Top 30 Interview Questions on Java OOPS Concepts In this section, we’ll look at the top 30 interview questions on various Java OOPS concepts. Java is an Object-Oriented Programming language as it uses Objects that acquire certain properties with the help of functions and methods. Note that hi...
Java Virtual Machine (JVM) is the heart of java programming language. JVM is responsible for converting byte code into machine-readable code. JVM is not platform-independent, that’s why you have different JVM for different operating systems. We can customize JVM with Java Options, such as all...
Ordered: It means the values that are stored in a collection is based on the values that are added to the collection. So we can iterate the values from the collection in a specific order. Sorted: Sorting mechanisms can be applied internally or externally so that the group of objects sorted...
Java is known for its simplicity of code, adding the concept of pointers will be contradicting. Moreover, since JVM is responsible for implicit memoryallocation, thus in order to avoid direct access to memory by the user, pointers are discouraged in Java. ...
It is a programming concept that allows running multiple tasks within one single program in a concurrent manner. 4) When and by whom was Java developed? Java was developed in 1995 by James Gosling. Top Java Interview Questions and Answers – Set 2 ...
9. Who Created Java? Java was first created byJames Goslingat Sun Microsystems. The first public version was released in 1996. 10. What is the latest version of Java? Java 12 is the latest version, released on March 19, 2019. Now, Oracle releases a new java version every 6 months. So...
Basic concepts of OOPs revolve around the following Class and Structure: Classes are used as a reference, for grouping both data and methods. Classes have to include constructors and destructors, and they support the concept of inheritance. Classes can also contain null variables. Structures are ...
Main Java-based AOP implementations are listed below : AspectJ Spring AOP JBoss AOP We can find the big list of AOP implementations on thewiki page. 4. What are the Different Types of Advices? An advice is the implementation of cross-cutting concern that we are interested in applying to oth...
() method from java.lang.Object, the finalize() method is called by garbage collector when it determines no more references to the object exists. In Java, it is good idea to explicitly assign null into a variable when no more in use. I Java on calling System.gc() and Runtime.gc(),...
When you are preparing to interview for a Java programming job, it’s important to consider the questions you’ll be asked. These interview questions can vary based on many factors, including company type, role level, and how long the company you interview with has been in business. How can...