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

Core Java Interview Questions

Questions Answers Views Company eMail

Which is faster call by value or call by reference?

929

Why parameters should be passed by reference?

966

What is the synonym of framework?

998

What is the use of singleton class?

967

What is super constructor?

993

What is the purpose of the main method?

990

What is the hashcode () and equals () used for?

1032

Why singleton is not thread safe?

988

What is super keyword explain with example?

1284

Why you should not use singleton?

965

What is the difference between method and means?

1074

What lambda means?

1001

Why can't you declare a class as protected?

1128

What is the synonym of procedure?

1114

What is return data type?

1002

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Un-Answered Questions { Core Java }

What is update method called?

1153

What 5 doubled?

984

Is null function in java?

1034

Give me some null interfaces in java?

1052

How to optimize the javac output?

1018

Explain, java is compatible with all servers but not all browsers?

1060

What is stored procedure. How do you create stored procedure ?

1948

How do you create an array in java?

988

what is encapsulation in java? Explain

1105

What is difference between hashset and hashmap?

1113

Hi friends am new to java. I read jar file means collection of java files. For executing struts application what are the necessary jar files. " struts.jar " file contains what. can u explain

1927

What are use cases?

973

How to solve the problem of generating the unique hash keys with hash function?

1913

whatis Home interface and Remoteinterface? with example?

2001

What initialize variables?

1017

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