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

Core Java Interview Questions

Questions Answers Views Company eMail

Write a program to check string is palindrome without using loop?

Cyient,

1035

What is jvm? How its run?

1084

Define inheritance with reference to java.

1089

When will we prefer to use set and list in java and why?

963

How can we create a synchronized collection from given collection?

1085

How to avoid memory leak in java?

1138

What is the difference between a checked and an unchecked exception?

Cyient,

996

How dead lock situation occurs in java and how you can identify it?

996

What are the various access specifiers in java?

1002

Write a java program for binary search?

1061

Explain the difference between call by refrence and call by value?

1022

Why we use multi threading instead of multiprocessing?

1065

How to write custom exception in java?

Cyient,

1054

Name and explain the types of ways which are used to pass arguments in any function in java.

1078

Explain how hashmap works?

1063

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Un-Answered Questions { Core Java }

How do you sing an Applet ?

2459

what is the difference between future and callable interface in java?

1234

What are the basic interfaces of java collections framework?

1119

What are the differences between wait() and sleep()?

1016

What is the purpose of finalization in java programming?

1028

What is instance synchronization?

1048

Explain working of call by reference function invoking.

1027

Explain about varargs in java?

1130

A person says that he compiled a java class successfully without even having a main method in it? Is it possible?

1056

What is the main use of java?

1169

What is string array?

1064

Write a program to print fibonacci series

1158

What is a platform?

1076

What are some examples of variable costs?

955

Is it possible to use Semaphore/ Mutex in an Interrupt Handler?

1092

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