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 is for datainputstream?

1 4046

What is the use of static keyword in "public static void main()"

College School Exams Tests, Infosys, Six Dee Telecom,

10 12959

what is mena by object block any what is the use of that

CGI,

2216

can any body tell me? does advance java and j2ee both are same.

CTS, Infosys,

4 10365

does core java and j2se both are same?

5 14874

what is difference between signed & unsigned char?

2 5020

What is the blank final variable?

3 6516

difference throws and throw in java

3 5238

What is “try and catch” in java

2 4780

Integer.parse Int(bf.readLine(System.out.println("enter value for n["+m+"]:"))); can it run under this

1 3069

what is mean by ooad? where we are using? can you tell me any real time example?

Eka Software,

1 3899

What is mean by UML? what is the use? where we are using?

Eka Software,

1 4554

Any one can explain how the inerface uses in java. give with example.

IBM,

1 2935

interface X{ void m1(); void m2(); } class Child2 extends Object implements X { public void m1(){ System.out.println("Child2 M1"); } public void m2(){ System.out.println("Child2 M2"); } } public class ParentChildInfterfaceDemo { public static void main(String[] args){ X x = new Child2(); X x1 = new Child2(); x.m1(); x.m2(); x.equals(x1); } } Will the above code work? If yes? Can you please explain why the code x.equals(x1) will work as the equals method is called on interface reference vaiable?

2 5767

how can you say that java is independ language

TCS, Wipro,

2 5732

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Un-Answered Questions { Core Java }

What happens when I use / and % with a negative numerator?

1045

How to check if a list is sorted in java?

1037

Can list have duplicates in java?

912

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

1007

What is use of a abstract variable?

991

Can we use string in switch case in java?

1059

What is data type in java?

908

Can we override private method in java?

1091

What is hash code collision?

1052

What is the lifetime and scope of a variable?

1020

In multi-threading how can we ensure that a resource isn't used by multiple threads simultaneously?

1324

Why is method overloading not possible by changing the return type in java?

1009

What is string and its types?

1189

What is java developer skills?

985

How is a structure different from array ?

1052

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