We develop the java program using Java development kit (JDK) and then compile it using “javac” command which is also a part of JDK. Result of javac command is the .class file which is a byte code and is platf
Another useful interview strategy is to review potential Java interview questions in advance. Let’s check out examples of some of the top Java interview questions. Also, each question includes some information that can help refresh your memory. The topics we will cover include: General Java inter...
Java 8 has been released in March 2014, so it’s one of the hot topics in java interview questions. If you answer this question clearly, it will show that you like to keep yourself up-to-date with the latest technologies. Java 8 has been one of the biggest releases after Java 5 anno...
Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory. User program cann't directly free the object from memory, instead it is the jo...
It’s a great design question and asked a lot in java interviews. This post provides all the differences between abstract class and interface. When should we use interface over the abstract class and vice versa? The post also explains how to use abstract class and interface to create a flexi...
This is probably the first question you’ll be asked. Object-Oriented Programming, as the name suggests, deals with Objects. Objects are used to emulate real world objects, and then they are assigned to a class. An object will have attributes and behaviour similar to the other objects in th...
This is most famous question in OOPs programming. if you have two interfaces and driving a class and these two interfaces have the same name method then how will you implement those same name methods. The below program is an example of the above problem. ...
To avoid this, add a question mark at the end of each item being accessed. This tells Javascript to use optional chaining. When using optional chaining, if the object being accessed is undefined, the entire operation short circuits and evaluates to undefined. // Safe property access with opt...
Question-30. What is the difference between the keywords struct and class in C++ ?Answer- By default the members of struct are public and by default the members of the class are private.Question-31. Can we implement all the concepts of OOPS using the keyword struct ?Answer- Yes....
1.17.How to Make a Java class immutable? An immutable class is one whose state can not be changed once created. There are certain guidelines to create a class immutable in Java and you must know them to answer this question correctly. ...