Core Java Interview Questions On the introduction of java.

Hello Friends, In this blog post(Core Java Interview Questions On the Introduction of Java) I am going to let you know about a few important questions core Java related to the introduction of Java.

Core Java interview questions cover all the important questions of the topic mentioned above.|Core Java Interview Questions On the Introduction of Java |

These core Java interview questions are a great help to remember all the important highlights and important topics from each Java chapter.|Core Java Interview Questions On the Introduction of Java |

These interview questions will surely help to understand a few very confusing concepts in Java.

Why pointers are eliminated from Java?

The various reasons for the elimination of pointers from Java are given below.

Most of the time pointers create confusion for the programmer.

A pointer may crash a program easily, for example, when we add two pointers, the program crashes immediately.

The same thing could also happen when we forget to free the memory allotted to a variable and reallot it to some other variable.

Pointers break security. Using pointers, harmful programs like viruses and other hacking programs can be developed.

What is the difference between a function and a method?

A method is a function that is written in a class. We do not have a function in Java: instead, we have a method. This means whenever a function is written in Java.

It should be written inside a class only. But if we take C++, we can write the function inside as well as outside the class.

So, in C++, they are called member functions, not a method.

Which part of JVM will allocate the memory for a Java program?

The class loader subsystem of JVM will allocate the necessary memory needed by the Java program.

Which algorithm is used by the garbage collector to remove the unused variables or objects from memory?

The garbage collector uses many algorithms but the most commonly used algorithm is mark and sweep.

How can you call the garbage collector?

The garbage collector is automatically invoked when the program is being run, It can also be called by calling the GC () method of the runtime class or system class in Java.

What is a JIT compiler?

JIT compiler is part of JVM which increases the speed of execution of a Java program.

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Core Java Interview Questions On the introduction of Java.