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Core Java Interview Questions
Questions Answers Views Company eMail

What do you mean Abstraction in java?

Aspire, Infogain,

1127

What is meant by 'Class access modifiers'?

HCL,

1095

Compare Mutex and Semaphore in java.

Ciena,

1055

Describe the Big-O Notation.

Global Logic,

1102

What is the use of StringTokenizer class?

Hexaware, Virtusa,

1117

Difference between stack and queue?

Flextronics,

1139

Describe the syntax of multiple inheritance? When do we use such an inheritance?

Fidelity,

1146

What is the concatenation operator in java?

Aspire, Infogain,

1211

Explain the access modifiers for a class, method and variables?

Global Logic,

1186

What is OOP's Terms with explanation?

 1248

What is better - 'bit-shift a value' or 'multiply by 2'?

DELL,

1264

How would you use Bubble Sort to sort the number of elements?

Genpact,

1062

What is close method? How it's different from Finalize & Dispose?

InfoAxon Technologies,

1127

Can a private method be declared as static?

Global Logic,

1068

What do you understand by access specifiers in Java?

Genpact,

1054

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Un-Answered Questions { Core Java }

What is api data?

1054

How do you implement singleton class?

1040

What is the significance of java packages?

1143

Define canvas?

1029

Does constructor return any value?

1088

what do you mean by java annotations?

1230

What is reflexive association?

1878

What is the primary benefit of encapsulation?

1158

What is command line used for?

1143

What is operator overloading. Is it is supported in java?

1096

What are the major advantages of internal iteration over external iteration?

1109

Difference between arraylist and vector.

1182

How many times finalize method will be invoked? Who invokes finalize() method in java?

1073

What is a local class in java?

1093

What is the relationship difference the canvas class and the graphics class?

1119

For More Un-Answered { Core Java } Questions Click Here