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 7981

What is JIT ?

Satyam,

4 8067

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

CTS,

5 8058

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

5 9528

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 10548

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

4 4815

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

5 5535

can u override the start() method of Thread class

5 18527

which method throws exception of type Throwable

2 4636

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

4 6632

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

Bosch,

4 11046

how do you store phone numbers using java collections

Bosch, IBAB,

5 17232

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

6 10634

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

HCL,

5 9358

What is difference between hash mapping and hash table?

NDS, Wipro,

5 9009

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Un-Answered Questions { Core Java }

What is java virtual machine and how it is considered in context of java’s platform independent feature?

649

why java does not support unsigned keyword?

4243

What is r * in math?

548

How do you implement tree mirroring in java?

587

Define inheritance?

549

Explain the difference between string, stringbuffer and stringbuilder in java?

553

Why java is said to be pass-by-value ?

542

What if I write static public void instead of public static void in java?

577

What are the supported platforms by java programming language?

565

What are the drawbacks of reflection?

559

What is method overloading and method overriding?

536

Is it possible to instantiate the abstract class?

538

What is the difference between access specifiers and access modifiers in java?

567

What is method in java ?

621

What is yield () in java?

478

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