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

Core Java Interview Questions

Questions Answers Views Company eMail

Difference between Web-based applications,Client- Server applications and Distributed applications?

Infosys,

3 13608

Catch(Exception e){ } in that what is Exception and purpose of that in that place exactly?

3 4964

what is the diff between Servletcontext and servletconfig?

5 7206

how many access specifiers are available in java

11 23227

How many objects are created for a singleton class

Ness Technologies,

7 14822

How to sort the elements in HashMap

Ness Technologies,

3 11828

What is non static block in java

Emphasis, Ness Technologies,

10 23897

How to synchonise HashMap

IBM,

4 7936

Program to output as below formate: 1 2 3 4 5 6 7 8 9 10

Huawei,

4 8031

Program to find greatest prime number in n numbers?

Huawei,

3 15881

program to validate the IP address? Validity range should be 0 to 255

Huawei,

1 10670

question on Thread synchronization

Huawei,

3 10206

diff b/w sleep(1000) and wait(1000)?

Huawei,

4 21120

WHAT IS THE MEANING OF ALL TYPE OF BUZZWORDS?

4 14329

who can we create the object of a class? in how many ways we can create it (max 5)

2 5591

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Un-Answered Questions { Core Java }

How do I enable java in safari?

1041

What does @param args mean in java?

1065

What is an accessor?

1693

What is string in java with example?

1031

What are the types of casting?

1070

Tell me are there implementations for sorting and searching in the java libarary?

1038

What is the difference between an inner class and a sub-class?

1021

What is java virtual machine? Explain

1036

How to avoid memory leak in java?

1141

What is classes in java?

947

What are the different types of java?

1067

What methodology can be utilized to link to a database?

968

What is field name?

1018

What does the three dot emoji mean?

1124

What are the drawbacks of singleton class?

1010

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