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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain your academic project?

Accenture, Levonsys, SDF, TCS, Tech Mahindra,

2 10843

What is JVM ? use of JVM?

BVC, Tech Mahindra,

6 14551

Memory management in JAVA

Tech Mahindra, Wipro,

3 15776

What is constructor

Manforce, Tech Mahindra,

9 11736

when everything can be done by static block then why do we use main method?.

2 5969

why we are calling j2se why not j1se or j3se or j4se..etc is there any reason.. can u please explain it... i shocked in my interview when they asked this question please explain ans

Infosys,

2 9357

Java openings 3 - 5 years, Lnt Infotech. requirements - core java, J2ee, struts, hibernate Interview Date:- 19 March 2011 Time:- 9:00 AM to 12:00 Pm Interview Location - L & T Infotech, Manapakkam, Chennai Refererral PS NO:- 291649 (Please mention this when u fill the form only then u will be considered for interview) Documents Required:- Latest Resume, Photograph and last 3 payslips Mail me on vasan2211@gmail.com once u appear for interview

L&T,

3362

how copy the hashmap object into arraylist at java program?

HCL, Wipro,

4 14679

can we access the method of class without creating the object of the class

3 6723

Nested classes VS Inner classes?

Infosys,

3 6406

waht You know about thread programming?

1 3496

What are Interceptors?

1 5786

i would like to attend for an interview of datalab technologies company i want to know the pattern of imnterview.

2386

Suppose i have two threads t1 and t2 are running.How the main thread will know that the two threads t1,t2 execution has completed?

Subex,

2 12692

I have a string like _a01_a02_a03_ and another string like _2_1.5_4_ as input.I want to extract a01,a02... to a string array and 2,1.5,etc to a double array with a01 corresponds to 2 and a02 to 1.5 etc. Need code in core java.. Can you do it?

Cognizant,

1 4325

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Un-Answered Questions { Core Java }

What is return in java?

972

What's the base class in java from which all classes are derived?

1272

Can I override protected method in java?

1078

What are abstract classes and anonymous classes?

1075

Which java version is latest?

1035

Name the components that are termed to be Heavy-weight component but available in Light-weight components?

2491

What do you mean by aggregation?

1322

Is java an open source?

974

what are three ways in which a thread can enter the waiting state? : Java thread

1022

What is ascii format?

994

How can a gui component handle its own events in java programming?

1046

What are the problems faced by java programmers who don't use layout managers?

979

Why pointers are not used in java?

1132

What is thread safe in java?

996

Is it possible to use string in the switch case?

1043

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