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 8961

What is JIT ?

Satyam,

4 10206

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

CTS,

5 9909

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

5 11274

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 11678

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

4 6556

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

5 7327

can u override the start() method of Thread class

5 20353

which method throws exception of type Throwable

2 5644

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

4 8347

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

Bosch,

4 12639

how do you store phone numbers using java collections

Bosch, IBAB,

5 19097

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

6 12424

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

HCL,

5 11094

What is difference between hash mapping and hash table?

NDS, Wipro,

5 10846

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Un-Answered Questions { Core Java }

What is data type in java?

953

How can we make a class singleton?

1134

What is Recursion Function?

1267

What does || mean in code?

1106

How we can make copy of a java object?

1154

Explain method local inner classes ?

1098

What is java reflection api?

1059

Are the imports checked for validity at compile time? Will the code containing an import such as java.lang.abcd compile?

1142

What string is utf8?

1049

How does class forname work in java?

1025

What is the function of compareto in java?

1123

Is java se open source?

1085

What is palindrome in java?

1044

Why is multiple inheritance not supported in java?

1095

What is parsing and its types?

1195

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