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

Core Java Interview Questions

Questions Answers Views Company eMail

What are decalarations?

860

What are facelets templates?

805

what is the purpose of using rmisecuritymanager in rmi?

777

What is the tradeoff between using an unordered array versus an ordered array?

939

Why we override equals() method?

793

What is the advantage of preparedstatement over statement?

838

What is the default size of load factor in hashing based collection?

820

What is difference between jdk,jre and jvm?

828

What is the difference between processes and threads?

787

What is the main difference between java platform and other platforms?

725

What is the difference between sleep and wait in java?

736

Explain java heap space and garbage collection?

810

What is meant by binding in rmi?

803

Can we call the run() method instead of start()?

813

How do weakhashmap works?

870

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Un-Answered Questions { Core Java }

can java object be locked down for exclusive use by a given thread? : Java thread

790

Does java trim remove newline?

742

What is unsigned char?

846

What is difference between arraylist and list in java?

834

What are static blocks in java ?

853

What are the two basic ways in which classes that can be run as threads may be defined?

832

Can list contain null in java?

890

Is it safe to install java on my computer?

795

If you are given the name of the function at run time how will you invoke the function?

904

Can you change array size in java?

750

worst case complexities of Quick sort and Merge sort.

810

Is it possible to define a method in java class but provide it’s implementation in the code of another language like c?

832

What are the advantages and disadvantages of object cloning?

799

How many bytes is 255 characters?

757

Can a final variable be null?

772

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