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 8857

What is JIT ?

Satyam,

4 10043

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

CTS,

5 9712

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

5 11107

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 11550

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

4 6410

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

5 7149

can u override the start() method of Thread class

5 20164

which method throws exception of type Throwable

2 5536

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

4 8145

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

Bosch,

4 12452

how do you store phone numbers using java collections

Bosch, IBAB,

5 18927

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

6 12225

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

HCL,

5 10879

What is difference between hash mapping and hash table?

NDS, Wipro,

5 10662

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Un-Answered Questions { Core Java }

Give few difference between constructor and method?

965

What is the output of the below java program?

1048

Explain purpose of sleep() method in java?

1120

What are peerless components in java programming?

1013

What is generic class?

1092

What is a predicate method?

1017

What are keywords in programming?

1012

What is continuity of a function?

1094

What is a function argument in java?

997

Is an empty arraylist null?

1094

How do you write methodology?

986

What is unsigned char?

1069

Differentiate between overriding and overloading cases?

1106

What is an example of a constant variable?

1087

Does java set allow duplicates?

1084

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