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

Core Java Interview Questions

Questions Answers Views Company eMail

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

ADP,

2 8772

What is JIT ?

Satyam,

4 9869

can we add two numbers without using arthematic operators? if possible how?

CTS,

5 9526

why the equals method can be override?when we override the equals method?

5 10946

why the wait,notify,notifyall methods are placed in object class?these are the thread concepts why these methods are placed in Object class?

Global Logic, Satyam,

2 11442

using equals method overriding which objects are compared?i.e same class objects or other class objects?Explain me.

4 6256

If set accepts only one argument then how can it compare two objects to avoid duplicates

5 6975

can u override the start() method of Thread class

5 20000

which method throws exception of type Throwable

2 5425

can u handle an error if u write Thowable in the catch class lise try { some errorneous code }catch(Throwable e){ ...}

4 7988

how to convert mm/dd/yy to dd/mm/yy using collections in java.

Bosch,

4 12343

how do you store phone numbers using java collections

Bosch, IBAB,

5 18756

which one is performance wise advantageious from List,Set,Map?

6 12073

string is immutable? right every one knows that, my question is it advantage or disadvantage making string immutable?

HCL,

5 10732

What is difference between hash mapping and hash table?

NDS, Wipro,

5 10500

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Un-Answered Questions { Core Java }

Explain about the security aspect of java?

932

How to implement a multithreaded applet?

2628

What does int argc char * argv [] mean?

955

What is jpa specification?

934

How can you handle java exceptions?

980

What is java thread dump, how can we get java thread dump of a program?

948

What is the purpose of using break in each case of switch statement?

979

Can we override the private methods?

955

What is Gang of four design patterns

1005

Name and explain the types of ways which are used to pass arguments in any function in java.

1030

Explain about static imports in java?

966

Explain about serializable interface in java?

955

Is it possible to use Semaphore/ Mutex in an Interrupt Handler?

1044

What all access modifiers are allowed for top class ?

1156

Can we pass a primitive type by reference in java? How

866

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