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

Core Java Interview Questions

Questions Answers Views Company eMail

write a program to create an vector with string(add,remove) operation.and value should be enter through keyboard.

Axcend,

2119

write a program to create an arraylist and listeterator.and value should be enter through keyboard.

Axcend,

1 3939

write a program to create an vector and listeterator.and value should be enter through keyboard.

Axcend,

1 3866

What will happen if we write code like: try{}catch(exception e)catch(IOException i)

CTS, TCS,

6 11188

How could Java classes direct program messages to the system console, but error messages, say to a file?

2 9276

Is Java Class Threadsafe ????? How to make Java class Thread safe??

Cognizant,

2 7954

why java does not have operator overloading?

2 5837

difference between java ,c#&java,c++

3 5702

What is diffrance between FINALIZE() & FINALLY ?

Infosys,

2 5238

how we can write the string concatenation program in java.

3 6912

give me the answer of this code class A extnds String This code we can write r not in Java? Explain?

4 6280

is set interface synchronized by default???

Manhattan,

2 7850

1.IN CASE OF DYNAMIC METHOD DISPATCH WHY WE USE REFERENCE VARIABLE,WE CAN USE THE DIFFERENT DEFINED OBJECT DIRECTLY TO ACCESS THE DATA MEMBER AND MEMBER FUNCTION OF THAT RESPECTIVE CLASS?WHAT IS THE MAIN FUNCTION OF "REFERENCE VARIABLE" HERE?

TCS,

2 4953

who can i handle multiple client in RMI

1897

what is difference betwenn Access Specifier and Access Modifier ????

2 4987

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Un-Answered Questions { Core Java }

Can we increase size of array?

1029

What is the purpose of static keyword in java?

963

How do you sort a list in java?

1033

What is super constructor?

998

What will be the default values of all the elements of an array defined as an instance variable?

1030

Which of the following is not an isolation level in the JDBC

2126

Will the jvm load the package twice at runtime?

1100

What is numeric function?

1014

Which number is denoted by leading 0x or 0x in java?

1044

Compare java and python.

984

Can we use switch statement with strings?

1045

What are the main uses of java?

992

What is java algorithm?

941

What is composition in java?

1291

Differences between external iteration and internal iteration?

1161

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