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Interview Questions and Answers for 'Infor' - 44 question(s) found - Order By Rating

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 Q1. What is concurrent interface ?Core Java2020-02-07 09:48:12

 This question was recently asked at 'Fidelity Information Services (FIS)'.This question is still unanswered. Can you please provide an answer.


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 Q2. Explain memory allocation and deallocation.C++2019-10-29 15:26:25

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 Q3. What are reference variables in cC++2019-10-29 15:24:36

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 Q4. What is size of structure in c ?C++2019-10-29 15:23:21

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 Q5. what are system callsOperating System2019-10-29 15:23:00

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 Q6. Differentiate osi and tcp/ip models and describe themNetworking2019-10-29 15:22:06

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 Q7. What is cluster ?2019-04-01 08:18:35

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 Q8. Pascal Triangle Program2019-01-08 15:54:25

Ans. package snippet;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Pascal {
   public static void main(String[] args) {

      System.out.println(generatePascalTriangle(5));

   }

   static Map> generatePascalTriangle(int size) {
      Map> triangle = new HashMap<>();

      triangle.put(0, Arrays.asList(1));
      triangle.put(1, Arrays.asList(1, 1));

      for (int i = 2; i <= size; i ) {
         List coeffListForI = new ArrayList<>();
         List coeffListForI_1 = triangle.get(i - 1);
         coeffListForI.add(1);
         for (int j = 0; j <= coeffListForI_1.size() - 2; j ) {
            coeffListForI.add(coeffListForI_1.get(j) coeffListForI_1.get(j 1));
         }
         coeffListForI.add(1);
         triangle.put(i, coeffListForI);
      }

      return triangle;
   }
}

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   Like         Discuss         Correct / Improve          Asked in 8 Companies


 Q9. Which s/w is used for adhar card verification for amount transfer?2018-08-27 13:13:22

 This question was recently asked at 'National Informatics Centre (NIC)'.This question is still unanswered. Can you please provide an answer.


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 Q10. Is java fully platform independent ?Core Java2018-08-27 13:13:05

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  Q11. What are the types of authentication used in Web services ?Web Service2018-07-14 11:02:27

Ans. Encrypted User Name / Password
Encrypted Password within Cookie
Encrypted Tokens
IP
Client Certificates
Oauth

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   Like         Discuss         Correct / Improve     authentication  security  web service     Asked in 12 Companies      basic        frequent


 Q12. Describe SQL JoinsDatabase2018-02-08 00:11:24

Ans. Oracle having following types of joins these are also called 8i joins. There are:

1. Equi (or) Inner join
2. Non Equi join
3.Self join
4.Outer join

Oracle also support the 9i (or) ANSI standard joins.There are:

1.Inner join
2.Left outer join
3.Right outer join
4.Full outer join
5.Natural join

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   Like         Discuss         Correct / Improve     sql joins  sql     Asked in 2 Companies


 Q13. What is abstraction ?Design2017-10-13 09:23:38

Ans. Abstraction is a process of hiding the implementation details and describing only the functionality to the user.

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   Like         Discuss         Correct / Improve     bstraction  oops concepts  oops principle     Asked in 22 Companies


 Q14. Can you explain software design principles cohesion and coupling with an example?Design2017-09-30 07:24:10

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   Like         Discuss         Correct / Improve     cohesion  coupling     Asked in 1 Companies        frequent


 Q15. Can you write the code for implementing the one to many (student -> courses) relationship in hibernate?Hibernate2017-09-30 07:23:32

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  Q16. Explain OOPs

or

Explain OOPs Principles

or

Explain OOPs Concepts

or

Explain OOPs features

or

Tell me something about OOPs
Core Java2017-06-13 08:25:45

Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features

1. Inheritance for Code Reuse
2. Abstraction for modularity, maintenance and agility
3. Encapsulation for security and protection
4. Polymorphism for flexibility and interfacing

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   Like         Discuss         Correct / Improve     oops  oops features     Asked in 237 Companies      basic        frequent


 Q17. Explain OOPS.Core Java2017-04-20 19:58:24

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   Like         Discuss         Correct / Improve          Asked in 2 Companies


  Q18. What are the core OOPs concepts ?Core Java2017-02-06 16:15:55

Ans. Abstraction, Encapsulation, Polymorphism , Composition and Inheritance

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   Like         Discuss         Correct / Improve     core oops concepts     Asked in 65 Companies      basic        frequent


 Q19. Write a Program to print factorial of a number using recursionCore Java2017-01-29 17:47:20

Ans. public class BuggyBread {
public static void main(String args[]) {
System.out.println(factorial(5));
}

private static int factorial(int number){
if(number == 1){
return 1;
} else {
return number * factorial(number - 1);
}
}
}

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   Like         Discuss         Correct / Improve     recursion     Asked in 24 Companies


 Q20. Is there any relationship between Web.xml and Spring.xml ?Spring2017-01-11 09:13:48

Ans. No, there is no relationship between web.xml and spring.xml but you have to configure spring.xml in web.xml in order initialize beans when application starts up

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   Like         Discuss         Correct / Improve     spring  web.xml  spring.xml  deployment descriptor     Asked in 1 Companies


Very frequently asked. Usually asked in this format or as difference with interfaces / concrete classes.
  Q21. What is an abstract class ?Core Java2017-01-10 13:12:20

Ans. Abstract class is the class that is not supposed to be instantiated. The purpose of the class to only have extension to the derived class.

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   Like         Discuss         Correct / Improve     abstract class     Asked in 6 Companies      basic        frequent


 Q22. What is the difference between ServletConfig and ServletContext ?Java EE2017-01-03 09:51:14

Ans. http://www.java4s.com/java-servlet-tutorials/difference-between-servletconfig-and-servletcontext-in-java/

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Frequently asked in Accenture.
  Q23. What is your biggest achievement at work ?General2016-12-15 14:14:22

Ans. [Open Ended Answer]

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   Like         Discuss         Correct / Improve     general question  non technical question     Asked in 20 Companies        frequent


Basic and Very Frequently asked.
  Q24. What is Polymorphism in Java ?Core Java2016-11-06 09:10:54

Ans. Polymorphism means the condition of occurring in several different forms.

Polymorphism in Java is achieved in two manners

1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas

2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding.

  Sample Code for overloading

  Sample Code for overriding

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   Like         Discuss         Correct / Improve     polymorphism  object oriented programming (oops)  oops concepts  oops concepts     Asked in 107 Companies      Basic        frequent

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Frequently asked to fresh graduates.
 Q25. What is ACID ?Database2016-11-04 08:09:44

Ans. ACID stands for Atomicity, Consistency, Isolation, Durability is a set of properties of database transactions.

Atomicity means all or nothing. i.e parts of a transaction shouldn't commit if any one of them fails. Either the whole transaction should succeed or it should be complete rollback.

Consistency means that any transaction should lead database from one stabe state to another.

Isolation means that the execution of transaction results in a system state that would be obtained if transactions were executed serially.

Durability means that when a transaction is committed it forms the permanent state of database.

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   Like         Discuss         Correct / Improve     database  acid     Asked in 7 Companies      Intermediate

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 Q26. What is a Database Procedure ?Database2016-10-18 11:27:59

Ans. Stored procedures are a batch of SQL statements along with programming constructs ( if else, loops etc ) and stored as a single program that can be called by different clients and hence reused.


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   Like         Discuss         Correct / Improve     database  stored procedure     Asked in 2 Companies      basic        frequent


Frequently asked to Fresh graduates.
 Q27. Write a program to implement Binary search ?Core Java2016-10-18 10:49:58

Ans. http://algs4.cs.princeton.edu/11model/BinarySearch.java.html

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   Like         Discuss         Correct / Improve     binary search  search     Asked in 5 Companies      basic        frequent

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 Q28. What are some alternates to keeping Audit Tables ?Database2016-07-14 14:24:37

Ans. Audit Tables generally stores Raw information to be reviewed in case of problems or determining impact. If Database space is an issue , and the audit information is rarely retrieved, one design could be to use compressed file system.

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   Like         Discuss         Correct / Improve     databases   audit tables   raw transaction information storage     Asked in 1 Companies


  Q29. What is a self Join and give an example of a self Join ?

or

What is self Join and What is it's purpose ?
Database2016-06-30 20:13:35

Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later.

Select D1.name , D2.name from Dept D1, Dept D2 where D1.employee_count < D2.employee_count

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   Like         Discuss         Correct / Improve     sql  joins  self join  self-join  Pair of employee names with first having lesser salary than later  Pair of department names where first dept has lesser employees than the later     Asked in 26 Companies      basic        frequent


Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback )
  Q30. Difference between == and .equals() ?Core Java
Anonymous
Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory.

x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object.

Sample code:

String x = new String("str");
String y = new String("str");

System.out.println(x == y); // prints false
System.out.println(x.equals(y)); // prints true

  Sample Code for equals

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   Like         Discuss         Correct / Improve     java   string comparison   string   object class   ==    equals   object equality  operator     Asked in 292 Companies      basic        frequent

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