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Interview Questions and Answers for 'Intel' - 12 question(s) found - Order By Newest

Frequently asked to fresh graduates and less experienced developers. Among the first few questions in many interviews.
  Q1. What are the difference between composition and inheritance in Java?Core Java
Admin
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Ans. Composition - has-a relationship between objects.
Inheritance - is-a relationship between classes.

Composition - Composing object holds a reference to composed objects and hence relationship is loosely bound.
Inheritance - Derived object carries the base class definition in itself and hence its tightly bound.

Composition - Used in Dependency Injection
Inheritance - Used in Runtime Polymorphism

Composition - Single class objects can be composed within multiple classes.
Inheritance - Single class can only inherit 1 Class.

Composition - Its the relationship between objects.
Inheritance - Its the relationship between classes.

  Sample Code for inheritance

  Sample Code for composition

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Frequently asked in Infosys and HCL Technologies ( Based on 2 feedback )
 Q2. What are different ways of object creation in Java ?Core Java
Admin
info@buggybread.com
Ans. Using new operator - new xyzClass()

Using factory methods - xyzFactory.getInstance( )

Using newInstance( ) method - (Class.forName(xyzClass))emp.newInstance( )

By cloning an already available object - (xyzClass)obj1.clone( )

  Sample Code for object initialization using clone

  Sample Code for object initialization using getInstance

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Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)
  Q3. Describe, in general, how java's garbage collector works ?Core Java
Anonymous
Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.

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Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.
  Q4. Differences between abstract class and interface ?Core Java
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info@buggybread.com
Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).

A class can extend single abstract class whereas it can implement multiple interfaces.

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 Q5. Can you give a real world example of Encapsulation and Abstraction ?Core Java2016-05-29 13:47:31

Ans. Car Engine is an example of encapsulation and abstraction. You ignite the car using an interface called starter and least bothered about how the tire actually moves (This is abstraction). The engine encapsulates the complete process to itself only and doesn't allow you to start the other components like the radiator etc ( this is excapsulation )

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Frequently asked to fresh graduates.
  Q6. Difference between Process and Thread ?Operating System
Anonymous
Ans. Process is a program in execution whereas thread is a separate path of execution in a program.

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 Q7. What is unmarshalling ?
Anonymous
Ans. Its the process of creating Java Objects out of XML structures.

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   Like      Discuss      Correct / Improve     xml   java api for xml   unmarshalling   parser   sax   dom   architecture     Intel Securities


 Q8. Write a program to print all even numbers first and then all odd numbers till 100. For example the output should be
2
4
6
8
...... 100
and then
1
3
5
7
...... 99

using only 1 for loop ? Is it possible with just one loop ?
Core Java2017-01-27 18:20:39

Ans. Yes , It can be done using single for loop

public class BuggyBread{
public static void main (String args[]) {
   int x = 50;
   for(int i=1;i <= 100;i++){
      if(i<=50){
         System.out.println(i*2);
      } else {
         System.out.println(i-x);
         x = x - 1;
      }
   }
}
}

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 Q9. how does abstraction help your application ?Core Java2017-12-25 17:27:33

 This question was recently asked at 'Intel'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     abstraction  oops concepts     Intel      basic



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 Q10. What sets you apart from other developers ?

or

What are the distinguished qualities you have ?
General2018-07-19 21:15:01

 This question was recently asked at 'AECOM, Zillow,Tuff Shed,Mobiquity,Unbounce,Globe Co,Aequilibrium,Salesforce,QQ Solutions,Accenture,HCL Technologies,Integration Point,JDS Development Group,Intellinet,Dice,Link advantage,Indecomm Global Services,Schneider Electric,Regus,Golden State Warriors,WhatFix,MobileNow,Systemax,BASF,Mouser Electronics,Steinhafels,Yardi Systems,Colliers International,Nintendo of America,Morgan Stanley,Capgemini'.This question is still unanswered. Can you please provide an answer.


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 Q11. What is the purpose of doing mvn eclipse:eclipse or man idea:ideaMaven2018-08-30 08:55:25

Ans. It is an instruction to maven to set up files ( class path , project ) within the IDE

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 Q12. Do you like working on IntelliJ ? How is it different than Eclipse ?IntelliJ2018-08-30 08:58:30

 This question is still unanswered. Can you please provide an answer.


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