Core Java Interview Questions
Questions Answers Views Company eMail

Explain your academic project?

Accenture, Levonsys, SDF, TCS, Tech Mahindra,

2 9877

What is JVM ? use of JVM?

BVC, Tech Mahindra,

6 10606

Memory management in JAVA

Tech Mahindra, Wipro,

3 14638

What is constructor

Manforce, Tech Mahindra,

9 9510

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

2 4906

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 8368

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,

2856

how copy the hashmap object into arraylist at java program?

HCL, Wipro,

4 12973

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

3 5403

Nested classes VS Inner classes?

Infosys,

3 5046

waht You know about thread programming?

1 2825

What are Interceptors?

1 5011

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

1947

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 11652

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 3585


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Un-Answered Questions { Core Java }

Explain the Propertie sof class?

590


Is break statement can be used as labels in java?

511


How do you use wildcards?

538


What is function and method in java?

525


Write a java program to print fibonacci series?

542






what is the difference between Object Based Language and Object Oriented Language?

606


How do you check if a number is a perfect square?

518


What is bubble sort in java?

621


Why call by value prevents parameter value change?

588


What is floor math?

520


What are basic keywords?

559


Why collection doesn’t extend cloneable and serializable interfaces?

649


Can a variable be local and static at the same time?

548


Is java owned by oracle?

527


Can long be null in java?

546