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 10842

What is JVM ? use of JVM?

BVC, Tech Mahindra,

6 14544

Memory management in JAVA

Tech Mahindra, Wipro,

3 15766

What is constructor

Manforce, Tech Mahindra,

9 11727

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

2 5966

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 9356

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 14673

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

3 6720

Nested classes VS Inner classes?

Infosys,

3 6403

waht You know about thread programming?

1 3495

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.

2385

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 12691

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 4324

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Un-Answered Questions { Core Java }

Is upper case in java?

960

How can you handle java exceptions?

1029

What does i ++ mean in Java?

953

Explain the different forms of polymorphism?

1006

Why java is secure? Explain.

1042

What is the significance of java packages?

1106

What is parsing and its types?

1109

Write a java program to print fibonacci series?

955

Is assembly language a low level language?

955

How you can force the garbage collection?

985

Explain about complier design(phases)

1084

What are measurable parameters?

1077

Difference between keyword and identifier.

1028

Why are there no global variables in java?

1044

What are the advantages of exception handling in java?

1061

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