CoolInterview.com - World's Largest Collection of Interview Questions & Answers, FAQs, queries, sample papers, exam papers, dumps, what, why, how, where, when questions
Our Services
Get 9,000 Interview Questions & Answers in an eBook.




Get it now !!
Send your Resume to 6000 Companies

Search Interview Questions

Question: What is namespace?

Answer: Namespaces allow us to group a set of global classes, objects and/or functions under a name. To say<br>it somehow, they serve to split the global scope in sub-scopes known<br>as namespaces.<br><br>The form to use namespaces is:<br><br>namespace identifier { namespace-body }<br><br>Where identifier is any valid identifier and namespace-body is the set of classes, objects and<br>functions that are included within the namespace. For example:<br><br>namespace general { int a, b; } In this case, a and b are normal variables integrated within the<br>general namespace. In order to access to these variables from outside the namespace we have to<br>use the scope operator ::. For example, to access the previous variables we would have to put:<br><br>general::a general::b<br><br>The functionality of namespaces is specially useful in case that there is a possibility that a global<br>object or function can have the same name than another one, causing a redefinition error.



Category Templates in C++ Interview Questions & Answers - Exam Mode / Learning Mode
Rating (0.3) By 7422 users
Added on 10/22/2009
Views 72380
Rate it!
Question: What is namespace?
Answer:

Namespaces allow us to group a set of global classes, objects and/or functions under a name. To say<br>it somehow, they serve to split the global scope in sub-scopes known<br>as namespaces.<br><br>The form to use namespaces is:<br><br>namespace identifier { namespace-body }<br><br>Where identifier is any valid identifier and namespace-body is the set of classes, objects and<br>functions that are included within the namespace. For example:<br><br>namespace general { int a, b; } In this case, a and b are normal variables integrated within the<br>general namespace. In order to access to these variables from outside the namespace we have to<br>use the scope operator ::. For example, to access the previous variables we would have to put:<br><br>general::a general::b<br><br>The functionality of namespaces is specially useful in case that there is a possibility that a global<br>object or function can have the same name than another one, causing a redefinition error. Source: CoolInterview.com


Namespaces allow us to group a set of global classes, objects and/or functions under a name. To say<br>it somehow, they serve to split the global scope in sub-scopes known<br>as namespaces.<br><br>The form to use namespaces is:<br><br>namespace identifier { namespace-body }<br><br>Where identifier is any valid identifier and namespace-body is the set of classes, objects and<br>functions that are included within the namespace. For example:<br><br>namespace general { int a, b; } In this case, a and b are normal variables integrated within the<br>general namespace. In order to access to these variables from outside the namespace we have to<br>use the scope operator ::. For example, to access the previous variables we would have to put:<br><br>general::a general::b<br><br>The functionality of namespaces is specially useful in case that there is a possibility that a global<br>object or function can have the same name than another one, causing a redefinition error. Source: CoolInterview.com

Answered by: manoj kumar | Date: 12/13/2009 | Contact manoj kumar Contact manoj kumar

A namespace is a declarative region that is used to package names, improve readability and avoid name clashes that occur with multiple, independently developed libraries.<br><br>While writing a program different header files can be included. It may happen that some header files may contain same function or class names. Trying to access these functions or classes, may lead to ambiguity.This can be avoided using namespace.<br><br> Source: CoolInterview.com

Answered by: Monalisha Nayak | Date: 12/17/2009 | Contact Monalisha Nayak Contact Monalisha Nayak

A namespace define the scope of an identifier used in a program Source: CoolInterview.com

Answered by: rakesh | Date: 1/1/2010 | Contact rakesh Contact rakesh

namespace:it is used to reduce the colusion between the program Source: CoolInterview.com

Answered by: karthikeyan | Date: 1/17/2010 | Contact karthikeyan Contact karthikeyan

It is mainly used to avoid name conflicts for identifiers. elements that are defined in one name space is separate from another. Source: CoolInterview.com

Answered by: sangeeta babaleshwar | Date: 1/19/2010 | Contact sangeeta babaleshwar Contact sangeeta babaleshwar

namespace defines the scope of the identifier used in the program.<br>-> to use the identifier defined in the namespace we must use th include directive as:<br> using namespace std;<br>here std is the namespace where the ANCi c++ standard class libraries are defined.<br>->this will bring all the identifiers defined in the namespace to the current global scope. Source: CoolInterview.com

Answered by: Hema | Date: 1/30/2010 | Contact Hema Contact Hema

namespace define the the scope of an identifier used in the program Source: CoolInterview.com

Answered by: tadyal | Date: 2/4/2010 | Contact tadyal Contact tadyal

Namespace is used to understand the program in a batter way by defining their identifiers. Source: CoolInterview.com

Answered by: Neeshu soni | Date: 3/27/2010 | Contact Neeshu soni Contact Neeshu soni

One of the problems encountered in the C language is that you ?run out of names? for functions and identifiers when your programs reach a certain size.C effectively has a single arena where all the identifier and function names live, this means that all the developers must be careful not to<br>accidentally use the same names in situations where they canconflict. This rapidly becomes tedious, time-wasting, and,<br>ultimately, expensive.<br><br> Standard C++ has a mechanism to prevent this collision: the<br>namespace keyword. Each set of C++ definitions in a library or<br>program is ?wrapped? in a namespace, and if some other definition has an identical name, but is in a different namespace, then there is no collision. Source: CoolInterview.com

Answered by: seetharaman | Date: 5/23/2010 | Contact seetharaman Contact seetharaman

name space is a collection of predefined function which is used for declaring the variables and using the predefined function in that appropriate platform Source: CoolInterview.com

Answered by: pon babitha | Date: 6/1/2010 | Contact pon babitha Contact pon babitha

Namespace is used to understand the program in a batter way by defining their identifiers the current global scope.<br><br><br> Source: CoolInterview.com

Answered by: sathish | Date: 6/9/2010 | Contact sathish Contact sathish

it is a logical entity which is used to store one or more classes Source: CoolInterview.com

Answered by: srinivasaraju | Date: 6/20/2010 | Contact srinivasaraju Contact srinivasaraju


If you have the better answer, then send it to us. We will display your answer after the approval

Rules to Post Answers in CoolInterview.com:-

  • There should not be any Spelling Mistakes.
  • There should not be any Gramatical Errors.
  • Answers must not contain any bad words.
  • Answers should not be the repeat of same answer, already approved.
  • Answer should be complete in itself.

Post your answer here

Inform me about updated answers to this question.
Related Questions
View Answer

Please Note: We keep on updating better answers to this site. In case you are looking for Jobs, Pls Click Here Vyoms.com - Best Freshers & Experienced Jobs Website.

View All Templates in C++ Interview Questions & Answers - Exam Mode / Learning Mode




India News Network
Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
Cache = 0.03125 Seconds