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

Core Java Interview Questions

Questions Answers Views Company eMail

finalize() method?

5 11534

What is the use of bin and lib in JDK?

TCS,

8 35820

What are Transient and Volatile Modifiers?

SAP Labs, TUP Manila,

3 15566

Difference between this(), super()?

College School Exams Tests, Oracle,

12 37033

What is a package?

2 5980

What is casting?

3 6545

Difference between an argument and a parameter?

Accounting, HCL, IBM, Quinnox,

10 48103

Explain final, finalize() and finally?

Accenture, TCS,

11 38063

What are different types of access modifiers?

3 8391

What are Encapsulation, Polymorphism and Inheritance?

5 25024

Explain different ways of passing arguments to sub-routine?

1 5809

Difference between Superclass and Subclass?

7 48603

what modifiers are used with top-level class?

2 6217

What are inner and anonymous class?

3 7193

what is the Diff. between Access Specifiers and Access Modifiers?

BMC, Cyber Shot, Infosys, VTS, Wipro,

39 124337

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Un-Answered Questions { Core Java }

How many bits is size_t?

995

Why is String immutable?

1062

what is mutual exclusion? : Java thread

1021

Why is it called boolean?

1005

If we allocate the memory using 'new' & de-allocated using 'free' then what will happen?

1042

Is static a keyword in java?

984

What do you mean by local variable and instance variable?

954

What is the difference between inheritance and encapsulation?

1149

Why is core java important?

1042

Is final static java?

1012

Why are the objects immutable in java?

987

What are the types of java?

1106

What is the file type?

1025

What is the purpose of the System class?

1002

Why singleton is not thread safe?

992

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