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

Core Java Interview Questions

Questions Answers Views Company eMail

I/O blocking means?

1 4248

what are the purposes of native, transiant key words?

2 8062

Functionality of JVM?

Infosys,

7 31087

what is a static block?

4 8279

what are class,constructor and primitive data types?

IBM,

2 10205

what is an object and how do you allocate memory to it?

Anshinsoft, Wipro,

6 20078

How many ways can an argument be passed to a subroutine?

Technological University of the Philippines,

3 10919

What are different type of access modifiers?

3 9935

How do you set security in applets?

Wipro,

1 5983

Is JRE required to compile Java files ?

HCL,

4 16230

How to set the Heap size in Java ?

HCL,

2 12469

What is the life cycle of Thread ?

HCL, Varnar Softech,

12 41856

What is the format of Inner Class after it compiled?

1 5234

What is the use of anonymous inner classes ?

DELL, HCL,

12 30118

What is the use join() in Threads ?

HCL,

5 12469

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Un-Answered Questions { Core Java }

What are exception handling keywords in java?

992

Have you ever used hashtable and dictionary?

989

Is map sorted in java?

1021

What is an off by one error in java?

918

What is unmodifiable collection in java?

880

Why java is call by value?

992

What about member inner classes?

1056

What are multiple inheritances?

1073

Can we use catch statement for checked exceptions?

930

What is the difference between quicksort & mergesort? When should they be used? What is their running time?

1047

What is the purpose of file class?

983

Define a package.

1028

Is a method a function?

1022

What will be the initial value of an object reference which is defined as an instance variable?

1098

What is gc()?

999

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