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Sep 3, 2024 · Find 200+ core Java interview questions for freshers and experienced professionals with 3, 5, and 8 years of experience. Learn about Java features, concepts, OOP, multithreading, JVM, JIT, and more.
Mar 11, 2024 · Prepare for your Java interview with 2024 core questions and answers, covering topics such as OOPs, collections, exceptions, threads, design patterns, and more. Download a free PDF guide and get a personalized career roadmap.
Prepare for your next Java interview with 50 advanced questions and answers on topics such as Spring, JVM, JDK, JRE, beans, and more. Learn the benefits of using Spring framework, the difference between JDK and JRE, and how to use System.gc() and Runtime.gc() methods.
- CI server function is to continuously integrate all changes being made and committed to repository by different developers and check for compile er...
- * Developers practicing **continuous integration** merge their changes back to the main branch as often as possible. By doing so, you avoid the int...
- A Java virtual machine (JVM) is a process virtual machine that can execute Java bytecode. Each Java source file is compiled into a bytecode file, w...
- * **The Java Runtime Environment (JRE) **is basically the Java Virtual Machine (**JVM**) where your Java programs are being executed. It also inclu...
- These methods can be used as a hint to the JVM, in order to start a garbage collection. However, this it is up to the Java Virtual Machine (JVM) to...
- JDBC is an abstraction layer that allows users to choose between databases. [JDBC enables developers to write database applications in Java](http:/...
- The name **reflection** is used to describe code which is able to inspect other code in the same system (or itself) and to make modifications at ru...
- The [Iterator's](http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html) fail-safe property works with the clone of the underlying collec...
- The JVM has a heap that is the runtime data area from which memory for all class instances and arrays is allocated. It is created at the JVM start-...
- There are only three thread-safe methods: * repaint, * revalidate, * invalidate.
Aug 6, 2019 · Prepare for Java interviews with this list of 50+ core Java questions covering fundamentals, collections, multithreading, IO, JDBC, JVM, and more. See answers, hints, and resources for further learning and improvement.
- Javinpaul
Test your Java skills with these challenging questions on garbage collection, hash maps, function overriding, and more. Find answers, sources, and explanations for each question on FullStack.Cafe.
- Java provides and supports the creation both of **abstract** classes and **interfaces**. Both implementations share some common characteristics, bu...
- There are several differences between `HashMap` and `Hashtable` in Java: 1. `Hashtable` is synchronized, whereas `HashMap` is not. This makes `Hash...
- * An **Error** "indicates serious problems that a reasonable application should not try to catch." * An **Exception** "indicates conditions that a...
- It doesn’t! Garbage Collection simply cleans up unused memory when an object goes out of scope and is no longer needed. However an application coul...
- The name **reflection** is used to describe code which is able to inspect other code in the same system (or itself) and to make modifications at ru...
- * Method **overloading** in Java occurs when two or more methods in the same class have the exact same name, but different parameters. ```java clas...
- It is not possible to do something like you want in Java. Different Java applications will use different JVM's fully separating themselves into dif...
- The [Iterator's](http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html) fail-safe property works with the clone of the underlying collec...
- The major advantage of an ordered array is that the search times have time complexity of O(log n), compared to that of an unordered array, which is...
- The JVM has a heap that is the runtime data area from which memory for all class instances and arrays is allocated. It is created at the JVM start-...
Aug 29, 2024 · Prepare for Java interview questions based on your level of experience and skills. Review common questions and answers on basic, intermediate and advanced Java topics, such as OOP, multithreading, Hibernate and more.
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Find out how to evaluate candidates' technical and soft skills for Core Java development with these 49 questions. See sample answers, tips, and examples for each question category.
