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 is Restrictions in hibernate?

Bally Technologies,

1 5797

What is the difference between array and arraylist? what is the difference between arraylist and linkedlist?

EDS, Matrix,

8 24628

Does a class inherit the constructor of its super class?if it does, how can you hide that constructor? if it doesnot how can you call it from the sub class?

2 8400

which methods consisting of the serilizable interface?

3 6552

What is OOP?

BMC, Microsoft,

2 6069

What is encapsulation? Elaborate with example?

BMC,

1 8575

What is data abstraction? Elaborate with example?

BMC, TCS,

4 36927

What is casting?

BMC,

3 6646

What is thread?

BMC, Virtusa,

7 10596

What is advantage of using threads?

BMC,

2 11123

How the threads are synchronized?

BMC, CTS,

2 6154

What is Interface?

BMC,

8 11893

Do you know thread pools?

BMC,

2198

How multi processing is achieved in JAVA?

BMC,

5 22262

What is hash method?

1 4354

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Un-Answered Questions { Core Java }

What are the two ways to create a thread?

1008

Is string is a class in java?

964

What is the best definition for data?

971

What do negative exponents mean?

1045

What is busy spin, and why should you use it?

1085

What do you mean by static variable?

1064

What is a numeric format?

1094

Why do we need wrapper classes?

1068

What is collections framework?

1151

Can we call the run() method instead of start()?

1040

How will you initialize an Applet?

1149

What is string data?

982

How many bits are used to represent unicode, ascii, utf-16, and utf-8 characters in java programming?

1013

What is difference between adapter class and listener?

1043

What causes memory leak in java?

936

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