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

Core Java Interview Questions

Questions Answers Views Company eMail

In method overloading ,if i change the return type to Long instead of INT,is the program execute

HCL,

6 11991

wat is class level lock and object level lock

HCL, Persistent,

3 22358

is it possible to add a object in a HASHMAP

HCL,

6 9948

why we cannot declare static variable inside a static method

4 9954

why using interface interface ?

2110

why use interface? if interface declear a method implement in class. why direct implement method in class

HCL,

1 2877

different between exception and error? explaim check and uncheck exception

4 7588

Difference between interface and abstract class with ex.

Cognizant, Tech Mahindra,

4 9784

what is Thread priority?

Tech Mahindra, Wipro,

4 8271

Distinguish method overloading and overriding

Tech Mahindra,

2 5825

Distinguish method overloading and method overriding

Tech Mahindra,

4 7574

What is thread priority?

Tech Mahindra,

1 5848

Why Over riding is Run Time Polymorphism?

Genpact,

3 16157

How many objects are created when we create String class object using new operator?

Mind Tree,

9 27885

What is onClassLoader in java?

Cap Gemini,

5 10075

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Un-Answered Questions { Core Java }

What are the special characters?

1018

Explain spliterator in java8?

1099

Where local and global variables are stored?

1128

Which java version is latest?

1089

What are the limitations of procedural programming approach?

1113

Explain about wait() method?

1075

What is a lock or purpose of locks in java?

1090

What is bean? Where it can be used?

1141

What is an empirical question?

1025

Why local variables are stored in stack?

1044

Explain about main() method in java ?

1118

How is abstraction implemented in java ?

1097

How the interruptible method gets implemented?

1029

Define max and min heap, also the search time of heap.

1075

What is int short for?

1116

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