Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

What is a Hash Table? What are the advantages of using a hash table?

Ciena,

1047

What is a Transient Object?

InfoAxon Technologies,

1040

Why declare Main() method as a static in java ?

HCL,

1035

This abstract class is correct ? abstract class A { public abstract void Disp(); public abstract void B() { } public absract virtual C() { } }

HCL,

954

What are memory tables?

Aspiring Minds,

1063

Explain the selection sort algorithm?

Hexaware,

1013

What are daemon Threads in java?

Impetus,

1142

What is the basic concepts of OOPS?

BlackRock,

1150

What is backdrop?

Atos Origin,

1024

Can we store variables in local blocks?

Global Logic,

1316

Write a program to search a number in the given list of numbers.

Honeywell,

1001

What is a default constraint?

HCL,

1033

What isan abstract class and when do you use it?

Genpact,

1 1536

What do you understand by Header linked List?

Genpact,

1050

Difference between current previous versions of Java?

Atos Origin,

990

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Un-Answered Questions { Core Java }

What is treeset and treemap in java?

1031

What is the function of java?

962

How to make a read-only class in java?

1100

Is alive and join method in java?

1087

How to create com object in Java?

1024

What's a method in programming?

1015

What do you mean by constructor?

944

Can bool be null?

946

how to create multithreaded program? Explain different ways of using thread? : Java thread

922

What are the different types of constructor?

945

what is meant wrapper classes?

1121

What is java util?

979

Can we declare a static variable inside a method?

966

What is the difference between && and & in java?

1041

What is the difference between hashset and treeset in java?

1020

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