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

Core Java Interview Questions

Questions Answers Views Company eMail

Define canvas?

995

What will be the default values of all the elements of an array defined as an instance variable?

1049

What’s the difference between the methods sleep() and wait()?

1031

What’s the difference between constructors and other methods?

1013

Is it possible to define a method in java class but provide it’s implementation in the code of another language like c?

1042

Is it correct to say that due to garbage collection feature in java, a java program never goes out of memory?

1041

What environment variables do I need to set on my machine in order to be able to run java programs?

1037

What are the restriction imposed on a static method or a static block of code?

1071

What will happen to the exception object after exception handling?

1010

What will happen if static modifier is removed from the signature of the main method?

984

What is the difference between superclass and subclass?

1192

What is meant by inheritance and what are its advantages?

1125

Under what conditions is an object’s finalize() method invoked by the garbage collector?

1054

If a method is declared as protected, where may the method be accessed?

1029

What is constructor chaining and how is it achieved in java?

1172

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Un-Answered Questions { Core Java }

Can singleton class be inherited in java?

1018

How do you do absolute value in java?

999

Why is static used?

1041

Why super is first line in java?

1073

Explain about anonymous inner classes ?

1095

How do you create a sop?

1023

Is linked list a linear or non-linear data structure?

978

Difference between Preemptive scheduling vs. Time slicing?

1038

Explain about fail safe iterators in java?

1041

Is 0 true or false in java?

1001

What is the biggest integer?

1074

What is substring 1 in java?

1175

What is difference between word and integer?

1095

What is a generic type?

1026

Are there structures in java?

988

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