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 are exception handling keywords in java?

1034

What is meant by method overriding?

1112

What is the purpose of a transient variable?

1068

Difference between notify() method and notifyall() method in java?

971

Explain about public and private access specifiers?

1056

What do you mean by constructor?

981

What is the disadvantage of synchronization?

1015

Explain about wait() method?

1025

What are the java ide’s?

1027

What is the final keyword in java?

1 1430

Difference between serialization and deserialization in java?

1140

How do you make a thread in java?

1099

When to use runnable interface vs thread class in java?

980

Explain thread life cycle in java?

1038

What is meant by local variable and instance variable?

1018

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Un-Answered Questions { Core Java }

Can we extend singleton class in java?

965

What is the difference between hashmap and hashtable? What is an interface?

1165

Why Java doesn’t support multiple inheritance?

1041

What do you understand by synchronization?

1050

What is the difference between hashset and treeset in java?

1068

Who developed java?

990

Write code to implement bubble sort in java?

995

Do we need to manually write Copy Constructor?

1033

What is casting in java programming?

1033

Is an array a vector?

1045

How do you define a singleton class?

1080

What does yield method of the thread class do?

1039

What are void pointers?

1306

Explain about join() method?

968

Explain about automatic type conversion in java?

1050

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