It’s not so easy to clear an interview with a distinction and not too hard to face them. No matter, you are a beginner or an experienced and which path you choose to build you career. We always need to prepare first for making our interview best. There are a number of job areas available out there and we all are well aware about the huge competition between them. Then, how you will create a great influence on the hiring manager to get the job easily. It’s a difficult thing for anyone, but if you are planning to build a profile as a Java developer then you must see below some Java questions and answers.

Sometimes, a selection of perfect path is also a great question before us. Don’t be confused, you can also have the brief details and important factors to choose Java as a career. In case you already have the enough details and looking for some direction to clear an interview, some of the noticeable points are mentioned below.

Just take a look over some tips and try to implement them in your next interview.

1. What is Java?

Java is a platform independent programming language that is compiled into a format of byte-code to develop large software applications. Also known as a high level language for it’s easy to use and perform in comparison to C++ and another programming language.

2. What do you mean by Platform Independent?

The word Platform Independent stands as a platform that can be run and compile programme identically that means work in the same way on all the operating systems like Windows, Linux, and many others.

3. What is JVM?

JVM (Java Virtual Machine) is an abstract computing machine that is used to execute the Java code. As a part of Java Runtime Environment, it enables Java byte-code to perform on any operating system or platform.

4. What are different types of memory areas allocated by JVM?

1. Class Method Area
2. Heap
3. Stack
4. Program Counter Register
5. Native Method Stack

5. Name of the Access specifiers for Java interfaces.

There are four types of access specifier, which have been listed below according to their order:-

1. Public:- As the name implies, class, method and field are approachable from anywhere.

2. Protected:- Accessible from the same class or their related sub-class, but not from the outside.

3. Default:- Accessible only from the related package.

4. Private:- Approachable from the specific class.

6. Difference Between method Overloading and method Overriding.

1. Overloading:-Method overloading, a part of compile time polymorphism or static polymorphism where parameter must be different.

2. Overriding:- Method overriding or you can say a run time polymorphism in which parameter must be same.

7. What is Garbage collection in java?

Garbage collection is used in most of the programming language to manage memory, which reclaims the memory automatically by the application.

8. Define JDK

JDK (Java Development Kit) is also the example of Java Runtime Environment that also comprise development tools. the method is used to create Java applications and applets.

9. Is Empty .Java file name a valid source name?

Yes, you can prove it by giving such this simple example:

the first step to saving your file by .java name only

compile it through javac .java and run by java your class name.

//save by .java only
class B{
public static void main(String args[]){
System.out.println(“Good morning”);
}
}
//compile by javac .java
//run by     java B

10. How objects are stored in Java?

Two types of memory are used in Java. one is stack memory and the another one is heap memory. The former comprise the primitive objects and the addresses of objects, while the latter for the objects values.

Conclusion:-

Well, the programming language is not so easy to understand and a career in this field is quite difficult. Therefore, we have mentioned some of the noticeable questions and answers that may give you an idea for the betterment of your interview. If you are fresher and wish to hike your knowledge in the same, you can also join the Java training Course at the SAG Academy Jaipur.

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