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 a Presistent Object?

InfoAxon Technologies,

1293

How do you find the maximum number from an array without comparing and sorting?

BlackRock,

1180

What do you mean by a JVM?

GE,

1365

Explain the selection sort algorithm and state its time complexity?

Flextronics,

1074

Give me an example of array and linked list? Where they can be used?

Ericsson,

1066

What is meant by 'bit masking' in java?

DELL,

1262

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

CDAC,

1095

What is an interoperable application in java ?

HCL,

1062

These static constructors are correct ? class A { statc intA() { } static A(int x,int y) { } static A(int x) { } }

HCL,

1142

What is the difference between Error, defect,fault, failure and mistake?

HCL,

1253

What are assertions in java?

Impetus,

1 2249

How are java objects passed to a method and what are native methods?

Genpact,

1133

What is scope & storage allocation of global and extern variables? Explain with an example

IBS,

1097

Explain with example the concept of constant variable in java.

HCL,

1268

what is the purpose of "virtual"?

EDS,

1134

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Un-Answered Questions { Core Java }

Is java hard to learn?

967

What is a singleton class? Give a practical example of its usage.

1153

Is java code slower than native code?

1127

Explain throw keyword in java?

1100

Can we make main() thread as daemon?

1160

When is the finally clause of a try-catch-finally statement executed?

1144

Does java vector allow null?

1010

Are private methods final?

955

What are inbuilt functions?

1049

What is google full form?

1070

Can we declare an interface as final?

1117

What is constant in programming?

1186

what is meant by encapsulation?

1133

What is an example of character?

1210

How to change the priority of thread or how to set the priority of thread?

1099

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