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Core Java Interview Questions
Questions Answers Views Company eMail

Can we place the any object to key attribute of HashMap?

HCL,

4 19021

Hi friends, i am new to java. can you explain how java is secured.

2 4550

Hi Friends, can u give me Real Time example for interface and abstract class.(With Banking Example)

4 14836

when to use ArrayList and when to use HashMap in webApplication.

1 4707

what is main difference between architecture,framework and design pattren

3 15876

Hi Friends, can you explain instance in java. In general instance means "occurence of something" . In java what is instance.

4 6053

Hi Friends, I am beginner in java. what i know about synchonized keyword is,If more that one 1 thread tries to access a particular resource we can lock the method using synchronized keyword. Then after that how the lock is released and how next thread access that.Please explain with example.

5 6351

Hi Friends, can you give difference between extending thread class and implementing runnable interface.

4 6563

what is an object class?Explain its methods?

6 11918

Hi Friends, I am new to java. Can u explain about thread concept.How i know one thread is locked, and how can i force or acquire another thread for lock . Finally how to know thread is released from lock. Explain types of lock(like method level and block level) in thread.

1 3667

I have a sorting issue with a Hashmap. My constraint is that I MUST use the Hashmap and work with existing code. I do a database query and place the results in a Hashmap. When I iterate thru the Hashmap, it loses the original alphabetical sorting done by the database. So, my problem is that I must sort the results coming out of the Hashmap which is then placed into another class.

1 4508

What is Session and cookies?Explain in detail with an example?

Accenture, CTS,

4 19215

I need to know about complete topic in java's collections i with an examples

TCS,

1 5073

Real Time sample code for Encapsulation and Abstraction. where to use abstract and where to use specifies like public private.

2 9423

What will happen inside init() in servlet. my interviewer asked servlet lifecycle. i said "once servlet is loaded in to memory init() will be called which performs servlet initialization " . Again interview asked what values will be initialized . what is difference between init() and init(ServletConfig config).

Infinite Computer Solutions, TCS,

2 13279


Post New Core Java Questions

Un-Answered Questions { Core Java }

What is locale?

1033


What is the use of predicate in java 8?

963


Can we create more than one object singleton class?

1038


What is the platform?

1002


Write a java program to generate fibonacci series ?

1071


What does the append?

1001


What is the purpose class.forname method?

964


What is the default size of arraylist in java?

1128


Why java is a platform independent? Explain

1090


What is parsing a string?

1172


Why does java not support operator overloading?

1140


Explain reverse a linked list iterative solution in java?

925


What does @override mean?

1206


What restrictions are placed on method overloading?

1178


Can java run on google chrome?

1195