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Core Java Interview Questions
Questions Answers Views Company eMail

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

Infosys,

3 11134

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

3 2934

what is the diff between Servletcontext and servletconfig?

5 4639

how many access specifiers are available in java

11 17372

How many objects are created for a singleton class

Ness Technologies,

7 11297

How to sort the elements in HashMap

Ness Technologies,

3 9662

What is non static block in java

Emphasis, Ness Technologies,

10 18208

How to synchonise HashMap

IBM,

4 4843

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

Huawei,

4 5701

Program to find greatest prime number in n numbers?

Huawei,

3 13533

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

Huawei,

1 9195

question on Thread synchronization

Huawei,

3 8101

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

Huawei,

4 17657

WHAT IS THE MEANING OF ALL TYPE OF BUZZWORDS?

4 11827

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

2 3890


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Un-Answered Questions { Core Java }

Addition to previous section relative word 5th one was Putrid ans: rotten, also there was prob. in 1st section on bucket weight ans:10kg, also there was a prob. on train speed to find bridge length ans:800 mtrs.

1222


What are the fileinputstream and fileoutputstream?

198


What is the size of arraylist in java?

179


Explain about main() method in java ?

224


Can the garbage collection be forced by any means?

190






what is the difference between preemptive scheduling and time slicing? : Java thread

183


What programs use java?

176


What are exception handling keywords in java?

238


What is the use of string and stringbuffer?

192


Can bool be null?

187


Do I need java for windows 10?

205


What are triggers in DB? Explain their types. How do they work?

246


Differentiate between stringbuffer and string?

227


What is boolean logic?

192


How do I stop concurrentmodificationexception?

159