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

Core Java Interview Questions

Questions Answers Views Company eMail

How does JAVA ClassLoader work?

IBM,

1 4536

What is java class writing rules?

Oracle,

1 3341

What are possible key words, we can use to declare a class?

Tech Mahindra,

2 4097

How many types of modifiers are there?

Infosys,

1 3421

What are access modifiers?

Infosys,

1 3423

What are non-access modifiers?

Cognizant,

2 3928

How does access modifiers work?

Wipro,

1 3058

How does static modifier work?

Wipro,

1 3351

How does abstract modifier work?

Wipro,

1 3009

How does synchronized modifier work?

IBM,

1 3058

How does final modifier work?

Tech Mahindra,

1 3552

What are legal modifiers that we can use to declare an inner class?

Infosys,

1 3470

What is difference between “==” and equals()?

IBM,

1 3142

Why do we need to override equals() and hascode() method of object class?

Cognizant,

1 3663

How to override equals() and hashCode() method in java?

Wipro,

1 3283

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Un-Answered Questions { Core Java }

Why java is platform independent? Explain.

1059

What is use of map in java?

1058

What is the purpose of main function in java?

1077

What is callablestatement? How you can call stored procedure to pass in parameter?

1068

What is the purpose of final keyword and when to use it?

1056

What is type safety in java?

1001

How do you know if a value is nan?

1110

Can you use this() and super() both in a constructor?

1036

Can java cast null?

1080

What is a final class in java?

1065

What steps are taken when the OS shifts from one-thread execution to another?

1414

Give example to differentiate between call by value and call by reference.

1113

What are the two types of java programming?

1108

I want my class to be developed in such a way that no other class (even derived class) can create its objects. Define how can I do so?

1225

Define interface in java?

1130

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