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 10939

What is JVM ? use of JVM?

BVC, Tech Mahindra,

6 14712

Memory management in JAVA

Tech Mahindra, Wipro,

3 15899

What is constructor

Manforce, Tech Mahindra,

9 11967

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

2 6065

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 9479

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,

3407

how copy the hashmap object into arraylist at java program?

HCL, Wipro,

4 14830

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

3 6844

Nested classes VS Inner classes?

Infosys,

3 6531

waht You know about thread programming?

1 3570

What are Interceptors?

1 5873

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

2442

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 12795

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 4407

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Un-Answered Questions { Core Java }

What is stringwriter?

1024

What does I ++ mean?

1118

Where and how can you use a private constructor?

1046

What are java threads?

1174

How do you do exponents in java?

1100

What is the hashcode () and equals () used for?

1126

How to perform bubble sort in java?

1052

Write a program in java to find the maximum and minimum value node from a circular linked list.

1151

What are the rules for variable declaration?

1013

What is the collections api?

1119

Is static variable stored in heap?

1051

What is unicode used for?

1241

Is an empty arraylist null?

1146

What is break and continue statement?

1167

What's the difference between int and integer in java?

1233

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