tag:blogger.com,1999:blog-6948558783847923082024-03-18T21:58:48.260-07:00Java67Learn Java and Programming through articles, code examples, and tutorials for developers of all levels.javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.comBlogger1040125tag:blogger.com,1999:blog-694855878384792308.post-58967839209238050062024-03-18T21:58:00.000-07:002024-03-18T21:58:15.890-07:00Difference between include() and forward() methods of RequestDispatcher in Servlert<div dir="ltr" style="text-align: left;" trbidi="on">
What is the difference between include and forward methods of <span style="font-family: Courier New, Courier, monospace;">RequestDispatcher</span> interface is one of the <a href="http://www.java67.com/2012/10/servlet-jsp-interview-questions-answer-faq-experience.html">frequently asked Servlet questions</a> from Java EE interviews and we'll see how you can answer this question on your interview. You get the <span style="font-family: Courier New, Courier, monospace;">RequestDispatcher</span> reference either from <span style="font-family: Courier New, Courier, monospace;">ServletContext</span> or <span style="font-family: Courier New, Courier, monospace;">ServletRequest </span>interface and even though both <span style="font-family: Courier New, Courier, monospace;">include()</span> and <span style="font-family: Courier New, Courier, monospace;">forward()</span> method allow a Servlet to interact with another servlet, the main difference between <span style="font-family: Courier New, Courier, monospace;">include()</span> and <span style="font-family: Courier New, Courier, monospace;">forward</span> is that the <span style="font-family: Courier New, Courier, monospace;">include()</span> method is used to load the contents of the specified resource (could be a Servlet, JSP, or static resource like HTML files) directly into the Servlet's response, as if it is part of the calling Servlet. <span></span></div><a href="http://www.java67.com/2016/09/difference-between-include-and-forward-in-Servlet-JSP.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com2tag:blogger.com,1999:blog-694855878384792308.post-43028318578257975582024-03-18T21:55:00.000-07:002024-03-18T21:55:53.470-07:00Base64 Encoding and Decoding Examples in Java 8 and Before<div dir="ltr" style="text-align: left;" trbidi="on">
Though, there are a couple of ways to <b>Base64 encode a String in Java</b> e.g. by using Java 6's <span style="font-family: "courier new" , "courier" , monospace;">javax.xml.bind.DatatypeConverter#printBase64Binary(byte[])</span> or by using Apache Commons Codec's <span style="font-family: "courier new" , "courier" , monospace;">Base64.encodeBase64(byte[)</span> and <span style="font-family: "courier new" , "courier" , monospace;">Base64.decodeBase64(byte[])</span><span style="font-family: inherit;">as shown <a href="http://javarevisited.blogspot.sg/2012/02/how-to-encode-decode-string-in-java.html" target="_blank">here</a></span>, or the infamous Sun's internal base64 encoder and decoder, <span style="font-family: "courier new" , "courier" , monospace;">sun.misc.BASE64Encoder().encode()</span> and <span style="font-family: "courier new" , "courier" , monospace;">sun.misc.BASE64Decoder().decode()</span>, there was no standard way in JDK API itself. That was one of the few missing item (another one is about <a href="http://www.java67.com/2016/08/java-8-stringjoiner-example-how-to-join-String.html" target="_blank">joining string</a>) which is addressed in Java 8.<span></span></div><a href="http://www.java67.com/2016/09/Java-base64-encoding-and-decoding-example-in-JDK8.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com0tag:blogger.com,1999:blog-694855878384792308.post-74007354035288992622024-03-18T21:53:00.000-07:002024-03-18T21:53:10.926-07:00How Java achieves platform independence? Answer<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="MsoNormal">
<b style="mso-bidi-font-weight: normal;"><u><span style="font-family: inherit;">Java is a platform-independent language
How?</span></u></b></div>
<div class="MsoNormal">
<span style="font-family: inherit;">Java a programming language provides platform independence, what does it mean? It
means the same Java program can be run on any platform or operating system like </span><span style="font-family: "Courier New";">Windows</span><span style="font-family: inherit;">, </span><span style="font-family: "Courier New";">Linux</span><span style="font-family: inherit;"> or </span><span style="font-family: "Courier New";">Solaris</span><span style="font-family: inherit;"> without any change. This is a
great benefit for someone coming from a platform-dependent programming language
like C or C++ whose code needs to be ported for every single platform because
they use native libraries, which differ in every platform. Now the question comes
<i>how Java achieves platform independence</i>, what makes <i>Java programs running on
every platform without any change</i>? <span></span></span></div></div><a href="http://www.java67.com/2012/08/how-java-achieves-platform-independence.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com11tag:blogger.com,1999:blog-694855878384792308.post-25628725040592420022024-03-18T21:50:00.000-07:002024-03-18T21:50:39.654-07:0010 Difference between Struts 1.x and Struts 2.x framework in Java<div dir="ltr" style="text-align: left;" trbidi="on">
What is the <b>difference between Struts 1 and Struts 2 </b>is one of the popular <a href="http://javarevisited.blogspot.com/2011/11/struts-interview-questions-answer-j2ee.html">Struts interview questions</a> from Java JEE interviews? If you have mentioned Struts in your CV then you can expect this question on the telephonic or face-to-face round of interviews. Struts 1.x was a very popular MVC framework for Java web applications in the last decade, but when Spring MVC comes it lost a lot of its sheen. Spring framework's <a href="http://javarevisited.blogspot.com/2015/06/difference-between-dependency-injection.html" target="_blank">dependency injection</a> and <a href="http://javarevisited.blogspot.com/2012/12/inversion-of-control-dependency-injection-design-pattern-spring-example-tutorial.html" target="_blank">inversion of control</a> feature, along with several other template-based features makes it the de-facto framework for developing Java applications. <span></span></div><a href="http://www.java67.com/2016/01/10-differences-between-struts1-and-struts2x-framework-java.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com0tag:blogger.com,1999:blog-694855878384792308.post-31014248046441971272024-03-16T01:00:00.000-07:002024-03-16T01:00:22.276-07:00When You should Not use Microservice Architecture? (Answer)<p> Hello guys, recently while giving interview in one of the big US based Investment bank I was asked about, <b>what are the scenarios when you shouldn't be using Microservices architecture?</b> When I hear this question I was big surprised not because I didn't know the answer but because most of the people ask about using Microservice architecture and this was the first time I am hearing otherwise. To be honest, it's a good question because most of the candidate will prepare about benefirst about Microservice architecture and they may not know when it's not appropriate to use it. Since I have worked in low latency high frequency application, I knew that multiple process means more latency so clearly a Microservices is a big no if you are working on a high frequency low latency application. In those cases you want to do all your calculations inside a single thread or process without even swapping memory to avoid delay. Hence the first answer to this question was, y<b>ou shouldn't be using Microservice in a low latency application. </b><span></span></p><a href="http://www.java67.com/2024/03/when-you-should-not-use-microservice.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com0tag:blogger.com,1999:blog-694855878384792308.post-36079513619473966722024-03-14T07:20:00.000-07:002024-03-14T07:20:48.446-07:00 10 Examples of Comparator, Comparable, and Sorting in Java 8<p>The Comparator class is used to provide code or logic for comparing objects in Java, while sorting a list of objects or a collection of objects. It's close cousin of <span style="font-family: courier;">Comparable</span> which provides natural order sorting e.g. ascending and descending orders for numbers like int, short, long or float, and lexicographic order for String i.e. the order on which words are arranged in dictionaries. The Comparators are used while sorting arrays, lists and collections. You pass logic to compare objects and sorting methods like <span style="font-family: courier;">Collections.sort()</span> use that logic to compare elements until they are arranged in sorted order. <span></span></p><a href="http://www.java67.com/2023/10/10-example-of-comparator-and-sorting-in.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-86212746755183664312024-03-08T06:03:00.000-08:002024-03-08T06:03:12.867-08:00Difference between static and instance member variables in Java? Answer Example<div dir="ltr" style="text-align: left;" trbidi="on">Hello Java Programmers, In the <a href="http://java67.blogspot.com/2016/04/difference-between-static-vs-non-static-method-in-java.html" target="_blank">last article</a>, I had explained some key differences between static and nonstatic methods in Java, and in this part, I'll explain the difference between static and nonstatic member variables in Java. The concept of static remains the same, that doesn't change with method or member variables but there are still some subtle details, which every Java programmer should know and understand. As with <a href="http://java67.blogspot.com/2014/10/difference-between-static-and-non-static-method-java-programming.html" target="_blank">static methods</a>, a static member variable belongs to a class and a non-static member variable belongs to an instance. <span></span></div><a href="http://www.java67.com/2016/05/difference-between-static-and-nonstatic-member-variable-in-java.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com3tag:blogger.com,1999:blog-694855878384792308.post-46949368582168213892024-02-29T20:03:00.000-08:002024-03-03T22:59:05.150-08:0023 Java Static Class, Methods and Variables Interview Questions with AnswersThe <span style="font-family: courier;">static</span> keyword is one of the essential keyword in Java which represent the concept of static in programming. <b>When you make something <span style="font-family: courier;">static</span>, it is averse to change</b> i.e. it is not dynamic and that is true for static variable, methods and class in Java. When you make a member variable static in Java, JVM assumes that the value of that variable will not change between instance and remain same for all objects of that class, hence it is also referred as class variable. Same is true for static methods, which is bonded during compile time because JVM assumes that their definition will not change because they are static and not virtual.<span></span><a href="http://www.java67.com/2024/02/23-java-interview-questions-on-static.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-222205556384574032024-02-22T18:41:00.000-08:002024-02-22T18:41:29.781-08:00 Top 20 Abstract Class and Method Interview Questions and Answers in JavaBoth abstract class and abstract methods are very important concepts in core Java and every Java developer should have good understanding of what they are, when to use them and how to use them. They are also very popular on core Java job interviews as well as on Oracle Java certifications e.g. OCAJP or OCPJP. You will often find a lot of code based questions testing essential core Java concepts based upon abstract class and methods in the real exam. All good mock exam simulators e.g. Whizlabs and Enthuware contains a lot of questions testing and explaining these key concepts. In this article, I have collated some of the frequently asked questions about <a href="https://javarevisited.blogspot.com/2023/07/what-is-abstract-class-and-method-in.html" target="_blank">abstract class</a> and <a href="https://www.java67.com/2017/07/can-you-make-abstract-class-method-final-in-java.html" target="_blank">abstract methods in Java</a>. You can review these questions before going for Java interview, both telephonic and face-to-face round. They are also very useful if you are preparing for Oracle Java certification e.g. OCAJP.<span></span><a href="http://www.java67.com/2024/02/top-20-abstract-class-and-method.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-76061621246450008482024-02-01T19:37:00.000-08:002024-02-01T19:37:46.169-08:00Top 6 books to learn Java Virtual Machine, Garbage Collection, and Performance [UPDATED]<div dir="ltr" style="text-align: left;" trbidi="on">
In the last couple of years, I have seen a trend of many Java developers wants to learn more and more about JVM internals and how Java Virtual Machine and its different component works. This trend was not so strong in the last decade, but with more and more focus on concurrency, performance, and scalability, Java developer is exploring <a href="https://javarevisited.blogspot.com/2019/04/top-5-courses-to-learn-jvm-internals.html" target="_blank">JVM internals</a>, Garbage collection, and Performance tuning in more detail. Unfortunately, there are not many good books to learn about JVM internals and their different components, but fortunately, we have an excellent Java Virtual Machine specification to learn fundamentals. It is also the most up-to-date reference because Java and JVM are kept changing, especially after <a href="https://javarevisited.blogspot.sg/2018/03/java-10-released-10-new-features-java.html#axzz5ALJyiIAt" target="_blank">Java 10</a>.<br>
</div><a href="http://www.java67.com/2019/08/best-books-to-learn-java-virtual-machine-in-depth.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com2tag:blogger.com,1999:blog-694855878384792308.post-88588750939040505632024-01-31T06:01:00.000-08:002024-01-31T06:01:27.945-08:00Top 5 Design Patterns Books for Java Developers - Best of Lot<div dir="ltr" style="text-align: left;" trbidi="on">
Design patterns are an essential topic for object-oriented programmers, like <a href="https://www.java67.com/2018/08/top-10-free-java-courses-for-beginners-experienced-developers.html" target="_blank">Java</a> and <a href="https://www.java67.com/2018/02/5-free-cpp-courses-to-learn-programming.html" target="_blank">C++</a> developers. It becomes even more important as your experience grows because everybody starts expecting a lot more from you in terms of writing quality code. I often receive emails from intermediate and senior Java developers about progressing to the next level, like how to become Tech Lead, Team Lead, or software architect; knowledge of design patterns plays an important role in taking more technical responsibility. While the<b> <a href="http://javarevisited.blogspot.sg/2013/06/5-must-read-books-to-learn-object.html" rel="" target="_blank">GoF book</a></b> is the bible for object-oriented design patterns, in my opinion, it is a bit too dry and academic. <br>
</div><a href="http://www.java67.com/2016/10/top-5-object-oriented-analysis-and-design-patterns-book-java.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com2tag:blogger.com,1999:blog-694855878384792308.post-47030677395217836562024-01-29T20:57:00.000-08:002024-01-29T20:57:39.317-08:00Top 5 Books to learn SQL and Database Design in 2024 - Best of Lot<div dir="ltr" trbidi="on">
<div dir="ltr" style="text-align: left;" trbidi="on">SQL (Structured Query Language) is one of the most essential skills of a programmer. I would rate this skill similar to UNIX if you are a professional programmer because it doesn't matter whether you are <a href="https://www.java67.com/2018/08/top-10-free-java-courses-for-beginners-experienced-developers.html" target="_blank">Java</a>, <a href="https://hackernoon.com/top-5-free-c-courses-to-learn-programming-in-2019-d27352277da0" target="_blank">C++</a>, or a <a href="https://javarevisited.blogspot.com/2019/10/top-5-courses-to-learn-asp-net-in-2019.html" target="_blank">.NET</a> developer, you are bound to write SQL queries. Since a database is an integral part of any modern Java or Web application, the Interviewer always preferred candidates with excellent SQL skills. Now, the big question comes, how a programmer can learn SQL? Does just knowing how to query a table is enough? If you remember, insert, update, delete, and select, then are you a competent SQL programmer? <br>
</div></div><a href="http://www.java67.com/2016/09/sql-5-best-books-to-learn-and-master.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-24677792383263026592024-01-28T20:20:00.000-08:002024-01-28T20:22:05.851-08:00Top 10 Free Python Programming Books - Download PDF or Read Online<div dir="ltr" style="text-align: left;" trbidi="on">
Every Programmer loves free eBook and free courses, even more, if it comes from renowned technical book publishers like Oreilly and Manning. In the last article, I have shared some of the best <a href="https://www.java67.com/2013/11/10-free-java-programing-books-download-PDF-HTML.html" target="_blank">free Java programming books</a>, and today I am going to share some of the equally <b>best free Python Programming books</b>. These books are not illegal copies that are uploaded into the internet, but they are legal books, made free by their authors and publishers, much like <a href="https://hackernoon.com/10-free-python-programming-courses-for-beginners-to-learn-online-38312f3b9912" target="_blank">free Udemy courses</a>, which their instructor made free for educational and promotional reasons. Though these are not full-fledged books but concise eBooks, they are very informative and comprehensive enough to learn things like <a href="https://dev.to/javinpaul/10-data-science-and-machine-learning-courses-for-programmers-looking-to-switch-career-57kd" target="_blank">Data Science</a> and Functional programming in Python.<br>
</div><a href="http://www.java67.com/2017/05/top-7-free-python-programming-books-pdf-online-download.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com22tag:blogger.com,1999:blog-694855878384792308.post-52102269738784423192024-01-27T20:53:00.000-08:002024-01-27T20:54:40.245-08:00Top 6 Django Python Courses for Beginners to Learn Online in 2024 [UPDATED]<div dir="ltr" style="text-align: left;" trbidi="on">
Hello guys, if you want to become a Python web developer and looking for the best online courses to learn Django, Flask, and Python web development, then you have come to the right place. In the past, I have shared the <a href="https://www.java67.com/2020/05/top-5-courses-to-learn-python-in-depth.html" target="_blank"><b>best Python courses</b></a> and the <a href="https://javarevisited.blogspot.com/2020/01/top-5-courses-to-learn-flask-for-web-development-with-python.html" target="_blank"><b>best Flask courses</b></a>, and today, I will share the best course to learn everything about Python web development. You may know that Python is a multi-purpose programming language meaning that you can use it in different fields such as GUI application, artificial intelligence, web application, and much more, just to name a few. <span></span></div><a href="http://www.java67.com/2020/06/top-5-courses-to-learn-django-and-python-for-web-development.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com2tag:blogger.com,1999:blog-694855878384792308.post-74643169065906593462024-01-27T02:13:00.000-08:002024-01-27T02:14:16.871-08:00Top 7 Free Maven and Jenkins Online Courses for Java Programmers in 2024 [ UPDATED]<div dir="ltr" style="text-align: left;" trbidi="on">Hello Java programmers, if you want to learn Maven and Jenkins and look for free resources like free online courses, you have come to the right place. Earlier, I have shared the <a href="https://medium.com/javarevisited/6-best-maven-courses-for-beginners-in-2020-23ea3cba89" target="_blank"><b>best Maven courses</b></a> and <b><a href="https://medium.com/javarevisited/7-best-courses-to-learn-jenkins-and-ci-cd-for-devops-engineers-and-software-developers-df2de8fe38f3?source=---------15------------------" target="_blank">best Jenkins courses</a>,</b> and in this article, I will share the best free Jenkins and Maven courses for Java programmers. If you have been doing professional Java development, you know that Maven and Jenkins are two of the most popular tools in the Java world. Maven helps organize your project and provide support to build and deploy Java projects, while <b>Jenkins</b> can provide continuous integration and delivery by completely automating build and deploy projects.<span></span></div><a href="http://www.java67.com/2018/02/6-free-maven-and-jenkins-online-courses-for-java-developers.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com4tag:blogger.com,1999:blog-694855878384792308.post-11208657965019971582024-01-26T22:33:00.000-08:002024-01-26T22:33:48.558-08:00Top 5 Books to Learn Hibernate for Java Developers in 2024 - Best of Lot<div dir="ltr" style="text-align: left;" trbidi="on">
Hello guys, if you want to learn Hibernate and looking for the best Hibernate books to start with then you have come to the right place. In the past, I have shared the <a href="https://medium.com/javarevisited/top-5-hibernate-online-training-courses-for-beginners-and-advance-java-programmers-469460596b2b" target="_blank">best Hibernate courses</a> and <a href="https://medium.com/javarevisited/10-best-online-courses-to-learn-spring-framework-in-2020-f7f73599c2fd" target="_blank">Spring online courses</a>, and today, I am going to share the best books to learn Hibernate for beginners. These books have been created by Hibernate experts like Gavin King, creator of Hibernate himself and it will help you to master this <a href="https://medium.com/javarevisited/top-10-frameworks-full-stack-java-developers-can-learn-in-2020-5995021401e5" target="_blank">essential Java framework for full-stack developers</a>. Hibernate is the leading ORM (Object to relational) framework in the Java world used to implement the persistence layer of enterprise Java applications. <br>
</div><a href="http://www.java67.com/2017/02/2-best-books-to-learn-hibernate-for-Java-Developers.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-29467839017685593042024-01-26T03:15:00.000-08:002024-01-26T03:15:18.100-08:00Top 5 Books to Improve Coding and Programming Skills - Must Read, Best of Lot<div dir="ltr" style="text-align: left;" trbidi="on">
Learning a Programming language, like <a href="https://www.java67.com/2018/08/top-10-free-java-courses-for-beginners-experienced-developers.html" target="_blank">Java</a>, <a href="https://javarevisited.blogspot.com/2018/12/10-free-python-courses-for-programmers.html" target="_blank">Python</a>, or <a href="http://www.java67.com/2018/02/5-free-cpp-courses-to-learn-programming.html" target="_blank">C++</a> is easy, but learning to write good code is not. Writing good code is more Art than Science and also an important differentiating factor between an average programmer vs. a good programmer. Since most of the programmers often look for inspiration and resources to improve their coding skill, I decided to share some of the good books which can help them to improve their coding. Since many universities, colleges, and training courses only teach programming languages but not the art of coding, it still remains one of the self-learned skills which many programmers acquired either in Job or working on real-world projects. <br>
</div><a href="http://www.java67.com/2016/02/5-books-to-improve-coding-skills-of.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com5tag:blogger.com,1999:blog-694855878384792308.post-79444487805293336012024-01-25T18:28:00.000-08:002024-01-25T18:28:10.696-08:00Top 5 Free AWS Developer Associate Certification DVA-C02 Courses in 2024 - Best of Lot<div dir="ltr" trbidi="on">
Hello guys, if you are preparing for the AWS Certified Developer Associate exam and looking for free online courses, then you have come to the right place. In the past, I have shared the free online courses to prepare for <a href="https://www.java67.com/2020/08/top-5-free-courses-to-pass-aws-cloud.html" rel="" target="_blank"><b>AWS Cloud Practitioner</b></a> and <a href="https://www.java67.com/2020/08/top-5-free-courses-to-pass-aws-sysops-administrator-associate-exam.html" target="_blank"><b>SysOps Administrator</b></a> certifications. Today, I will share free online training courses to prepare for the prestigious AWS Developer Associate exam. The Exam requires hands-on experience with AWS, but that's not enough, you also need to prepare all the exam topics, and that's where these online courses can help you. These are the best and completely free courses from websites like <a href="https://medium.com/javarevisited/my-favorite-udemy-online-courses-for-programmers-and-software-engineers-f9d941dd0035" target="_blank">Udemy</a>, <a href="https://medium.com/javarevisited/18-coursera-courses-you-can-join-in-2020-to-learn-from-the-worlds-top-tech-companies-google-74af46967d1e?source=collection_home---4------0-----------------------" target="_blank">Coursera</a>, freeCodeCamp, and Youtube, and you can use them to prepare for this prestigious AWS cloud certification. <br>
</div><a href="http://www.java67.com/2020/08/top-5-free-courses-to-pass-aws-developer-associate-certification.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-55842661579613810782024-01-25T05:08:00.000-08:002024-01-25T05:08:45.019-08:003 Best Books to Learn Java Programming for Beginners<div dir="ltr" style="text-align: left;" trbidi="on">Hello guys, if you want to learn Java from scratch and looking for the best Java books then you have come to the right place. Earlier, I have shared the<b> </b><a href="https://www.java67.com/2018/08/top-10-free-java-courses-for-beginners-experienced-developers.html" target="_blank">free Java courses for beginners</a>, and today, I am going to share the best books to learn Java from scratch. There is no doubt that the best book to learn Java for beginners is indeed <b><a href="https://www.amazon.com/Head-First-Java-Brain-Friendly-Guide/dp/1491910771?tag=javamysqlanta-20" rel="nofollow" target="_blank">Head First Java, 3rd Edition</a></b>. It's interesting, informative, and yet easy to read, which is what a beginner wants. The only drawback of this book was that there is was 3rd Edition available until a couple of months ago but now that drawback has also gone as the 3rd Edition of Head First Java is now available and it covers Java SE 17, the latest version of Java. <span></span></div><a href="http://www.java67.com/2015/05/best-book-to-learn-java-for-beginners.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com13tag:blogger.com,1999:blog-694855878384792308.post-17078800830178561372024-01-24T20:04:00.000-08:002024-01-24T20:04:58.381-08:0010 Free Courses to Learn Data Structure and Algorithms in Java, Python, and C++ in 2024 [UPDATED]<div dir="ltr" style="text-align: left;" trbidi="on">
Algorithms and Data Structure are two of the most fundamental and essential topics in Computer Science, which is used everywhere in software development. I firmly believe that a good knowledge of these two topics is also crucial to becoming a <a href="https://javarevisited.blogspot.com/2014/01/10-tips-to-improve-programming-skill-become-better-programmer.html" target="_blank">better programmer</a> because a person who has a good understanding of algorithms and data structures can make thoughtful choices and write programs that can handle changes better and perform well. They are also essential to crack coding interviews at top tech companies like <a href="https://javarevisited.blogspot.com/2012/01/google-interview-questions-answers-top.html" target="_blank"><b>Google</b></a>, <a href="https://javarevisited.blogspot.com/2015/12/30-microsoft-interview-questions-for-software-development-engineers.html" target="_blank"><b>Microsoft</b></a>, <a href="https://javarevisited.blogspot.com/2016/01/top-20-amazon-and-google-programming-interview-questions.html" target="_blank"><b>Amazon</b></a>, Facebook, and Apple, which emphasizes candidates' ability to use existing data structures and algorithms to solve complex problems they have never seen before.<br>
</div><a href="http://www.java67.com/2019/02/top-10-free-algorithms-and-data.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-57751746865543669812024-01-24T06:17:00.000-08:002024-02-01T19:40:48.675-08:00Top 10 Books Every Programmer Should Read<div dir="ltr" style="text-align: left;" trbidi="on">
There is a saying that if you learn from your mistakes, you will only going to learn few things, but if you learn from other's mistakes, you can learn a lot of things in a short time, and what could be a better way to learn from someone's experience then reading books. <a href="https://www.java67.com/2020/07/5-free-courses-to-learn-c-programming.html" target="_blank">Programming </a>as a career is about constant learning and updating yourself, but unfortunately, there is no right way to begin. Schools and Colleges are far behind when it comes to real-world programming, and every Computer Science graduate is not lucky to work in a company that is great in training. The other viable option is to read <a href="https://www.java67.com/2015/09/top-10-algorithm-books-every-programmer-read-learn.html" target="_blank">books</a>, join <a href="https://javarevisited.blogspot.com/2019/08/top-10-udemy-courses-and-certifications-for-programmers.html" target="_blank">online courses</a>, and follow advice from the great programmer and authors who are gone on that path, and learning from the book is the most tried and trusted way of all of them.<br>
</div><a href="http://www.java67.com/2015/03/10-books-every-programmer-and-software-engineer-read.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com23tag:blogger.com,1999:blog-694855878384792308.post-58814557425656882822024-01-23T06:38:00.000-08:002024-01-23T06:41:39.835-08:00Top 5 Courses to learn Web Scraping using Python and JavaScript in 2024 - Best of Lot<div dir="ltr" style="text-align: left;" trbidi="on">
Hello guys, you have come to the right place if you want to learn Web Scraping and are looking for the best online courses to learn Web Scraping using Python and other programming languages. Earlier, I shared the <a href="https://javarevisited.blogspot.com/2020/06/top-5-web-scrapping-tools-best-of-lot.html" target="_blank"><b>best web scraping tools</b></a> and <a href="https://www.java67.com/2020/07/top-5-courses-to-learn-scrapy-with-python.html" target="_blank"><b>best scrappy courses</b></a>. In this article, I will share the best online training courses to learn Web Scraping using <a href="https://www.java67.com/2019/07/top-5-free-nodejs-courses-for-web-development.html" target="_blank">NodeJS</a>, <a href="https://javarevisited.blogspot.com/2018/06/top-10-courses-to-learn-javascript-in.html" target="_blank">JavaScript</a>, <a href="https://www.java67.com/2020/05/top-5-courses-to-learn-python-in-depth.html" target="_blank">Python</a>, and BeautifulSoup. These are the best courses from sites like Udemy and Pluralsight, the best places to learn online. So <b>what is Web Scraping?</b> Web scraping, also known as web harvesting, is a technique used to extract large amounts of data from websites. How does this happen?<br>
</div><a href="http://www.java67.com/2020/07/top-5-courses-to-learn-web-scraping-in-python-and-javascript.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com0tag:blogger.com,1999:blog-694855878384792308.post-19526182474835181922024-01-22T19:54:00.000-08:002024-01-22T19:54:44.291-08:00Top 5 Books to learn React.js for Beginners in 2024 - Best of Lot<div dir="ltr" style="text-align: left;" trbidi="on">Hello guys, if you want to learn React.js and looking for the best resources like books, online courses, and tutorials then you have come to the right place. Earlier, I have shared the <a href="https://javarevisited.blogspot.com/2018/08/top-5-react-js-and-redux-courses-to-learn-online.html#axzz5QyVrOCeJ" target="_blank">best React courses</a>, <a href="https://javarevisited.blogspot.com/2020/10/top-5-websites-to-learn-react-for-free.html#axzz6nTA4tfFM" target="_blank">websites</a>, <a href="https://javarevisited.blogspot.com/2018/10/the-2018-react-developer-roadmap.html" target="_blank">roadmap</a>, and <a href="https://medium.com/javarevisited/5-projects-you-can-build-to-learn-react-js-ffaaac23d4f0" target="_blank">projects </a>you can build to learn React.js, and in this article, I am going to share the best books to learn React.js in 2024. From my experience of learning so many techs and programming language, I can say that books are the most complete way to learn. For a better learning experience you can combine those with online courses and projects. For example, you can combine these React books with these <a href="https://javinpaul.medium.com/top-5-courses-to-learn-react-js-in-2019-best-of-lot-fa02cd96cdf0" target="_blank">best React courses</a> and <a href="https://javarevisited.blogspot.com/2020/10/5-best-reactjs-projects-for-beginners.html" target="_blank">React projects</a> to become a React Developer in 2024. <span></span></div><a href="http://www.java67.com/2020/03/top-5-books-to-learn-reactjs-for-beginners.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-17713824182659295142024-01-22T06:21:00.000-08:002024-01-22T06:23:21.020-08:00Top 5 Spring Framework Books for Java developers (Includes Spring Security and Spring Boot) - Best of lot<div dir="ltr" style="text-align: left;" trbidi="on">
Spring framework is one of the most famous structures in the Java world, which used to develop Java applications, both core Java and web application. It is also one of the most job-oriented skills for Java developers; hence many beginners and intermediate Java programmers try to learn the Spring framework on their own. Though there are some excellent<a href="http://javarevisited.blogspot.com/2016/12/top-5-spring-and-hibernate-training-courses-java-jee-programmers.html"> Spring training courses</a> available online, books are still the most popular and preferred way to learn Spring frameworks like Spring core, Spring Boot, Spring MVC, Spring Batch, or Spring Security. I often receive queries for Spring book recommendations e.g., which Spring book is suitable for beginners, or which Spring book is good for intermediate and advanced developers, which book should I read to learn <a href="http://www.java67.com/2018/06/5-best-courses-to-learn-spring-boot-in.html">Spring boot</a>, <a href="https://javarevisited.blogspot.com/2018/02/top-5-spring-microservices-courses-with-spring-boot-and-spring-cloud.html">Spring Cloud</a>, Spring Batch, or <a href="http://www.java67.com/2017/12/top-5-spring-security-online-training-courses.html">Spring security</a>, etc.?<br>
</div><a href="http://www.java67.com/2016/12/5-spring-framework-books-for-java-programmers.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com1tag:blogger.com,1999:blog-694855878384792308.post-84819124906081749802024-01-21T05:54:00.000-08:002024-01-21T05:54:04.135-08:00Top 10 Algorithms books Every Programmer Should Read<div dir="ltr" style="text-align: left;" trbidi="on">
Algorithms are language agnostic, and any programmer worth their salt should be able to convert them to code in their programming language of choice. Unfortunately, I have come across several programmers who are <i>REALLY </i>good at programming languages like <a href="http://www.java67.com/2018/08/top-10-free-java-courses-for-beginners-experienced-developers.html" target="_blank">Java</a> or <a href="https://javarevisited.blogspot.com/2018/12/10-free-python-courses-for-programmers.html" target="_blank">Python</a>, like know minor details of API and language intricacies but have very poor knowledge of the fundamentals of Algorithms and Data Structure. Just ask them to implement any popular sorting algorithms like <a href="http://java67.blogspot.sg/2014/07/quicksort-algorithm-in-java-in-place-example.html" target="_blank">quicksort</a> or <a href="http://www.java67.com/2018/03/mergesort-in-java-algorithm-example-and.html" target="_blank">merge sort</a>, and they will fall apart. If you expect them to know more advanced and sophisticated algorithms like String processing algorithms, graph algorithms, tree traversal, or greedy algorithms, be ready to check on Interviews; otherwise, you might end up with some surprises.<br>
</div><a href="http://www.java67.com/2015/09/top-10-algorithm-books-every-programmer-read-learn.html#more"></a><div class="blogger-post-footer"><hr/>
<a href="http://java67.blogspot.com/">Java Interview questions and tutorials</a></div>javin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.com48