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HCL Core Java Interview Questions
Questions Answers Views Company eMail

java program that takes a 3 digit number n and finds out whether the number 2^n + 1 is prime, or if it is not prime find out its factors.

 7 8404

why we write public static void main (String args[]) in core java plz explain briefly??????????????????

 3 7250

what is the role of xml in core java?? and how we can use it?? can somebody give a sample program with explanation and from where i can read more about xml?????

 1803

how copy the hashmap object into arraylist at java program?

 4 12956

How can two threads be made to communicate with each other?

 3 7564

why java is better then .net?

 5 7479

Difference between hashCode() & equals()?

 3 6992

Why are the destructors for base class and derived class called in reverse order when the program exits

 1708

can write code for serialization ?

 1 3302

How to print a statement without using semicolan in java

 6 10160

When we r go to abstract class and when we go to Interface? i have confusion this question while in interview plz clarify

 3 5909

Java support call by reference (pass by reference) ?

 1 3836

What is the alternate of 'Inheritance' ?

 4 12583

int a=1,b=10; System.out.println(a+b--);

 12 13797

1) Find the Merge point of two linked lists. 2) Swap two bits of integer. 3) Reverse individual words of the sentence. 4) Reverse string without using temp string.

 2 5640

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HCL Core Java Interview Questions


Un-Answered Questions

Explain the different scenarios wherein you need to use different types of collections i.e list, set and map?

184

How do I lock an excel spreadsheet from editing?

328

Explain how do you sort filenames in a directory?

608

Differentiate between clustered and non-clustered index.

467

What are directives?

499




What is meant by lazy loading?

396

What are web services testing tools?

373

Why is swift so fast?

624

How can we test for drastic (severe) memory leakages?

634

A very strange fault i cam across today,that i never experienced not studied before, i need an answer for this. Phase to phase or line to line , L1,L2 & L3, voltages are 490VAC, but if i use line to ground , its again 490 VAC. . . whats the fault and theory behind of it?

1497

What is polymorphism used for?

573

Can we create object of interface?

605

Are ajax applications easier to develop than traditional web applications?

553

how to see the tables of 200 in client 100?

1411

Is node js frontend or backend?

246