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Interview Questions and Answers for 'Informatica' - 10 question(s) found - Order By Newest

Frequently asked to fresh graduates.
 Q1. What is ACID ?Database
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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Frequently asked question for intermediate developers. Frequently asked in HCL Technologies and EPAM.
  Q2. What is Volatile keyword used for ?Core Java
Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached.

  Sample Code for volatile

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   Like         Discuss         Correct / Improve     java   oops   synchronization   volatile   java keywords     Asked in 42 Companies      intermediate        frequent

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 Q3. What is PermGen or Permanent Generation ?Core Java
Ans. The memory pool containing all the reflective data of the java virtual machine itself, such as class and method objects. With Java VMs that use class data sharing, this generation is divided into read-only and read-write areas. The Permanent generation contains metadata required by the JVM to describe the classes and methods used in the application. The permanent generation is populated by the JVM at runtime based on classes in use by the application. In addition, Java SE library classes and methods may be stored here.

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   Like         Discuss         Correct / Improve     java   jvm   memory management   permgen   permanent generation   advanced   architecture     Asked in 9 Companies      expert


 Q4. What is a Database Procedure ?Database
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


 Q5. Describe SQL JoinsDatabase
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


 Q6. Differentiate osi and tcp/ip models and describe themNetworking
 This question was recently asked at 'Informatica'.This question is still unanswered. Can you please provide an answer.


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 Q7. what are system callsOperating System
 This question was recently asked at 'Informatica'.This question is still unanswered. Can you please provide an answer.


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 Q8. What is size of structure in c ?C++
 This question was recently asked at 'Informatica'.This question is still unanswered. Can you please provide an answer.


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 Q9. What are reference variables in cC++
 This question was recently asked at 'Informatica'.This question is still unanswered. Can you please provide an answer.


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 Q10. Explain memory allocation and deallocation.C++
 This question was recently asked at 'Informatica'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies



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