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Input and Output Operations in C++ Interview Questions & Answers

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Input and Output Operations in C++ Interview Questions & Answers

C++ uses a convenient abstraction called streams to perform input and output operations in sequential media such as the screen, the keyboard or a file. A stream is an entity where a program can either insert or extract characters to/from. The predefined object cin is an instance of istream class. The cin object is said to be attached to the standard input device, which usually is the keyboard. The cin is used in conjunction with the stream extraction operator, which is written as >> which are two greater than signs.

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What is the output of printf ("%d")
0.3 Rating
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Why do we need to close a file.
Eg.
ifstream ifile;
ifile.open("temp.dat")
.....
...
ifile.close();
What happens if we do not close() a file?
0.3 Rating
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What will be output of the following code
#include
using namespace std;
class abc
{
public :
void main()
{
cout<<" Its main function "< }
};
int main(int c, char **v)
{
abc a;
if(c<1)
{
cout<<" Error can not accept it "< exit(1);
}
cout<<" its in main program "< a.main();

return 0;
}
0.2 Rating
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Help me to write a c++ program using strings that does the following tasks 1)Removes multiple spaces between words. 2)find the longest word in a text. 3)extract the number of integers in the text. 4)extract the number of doubles.5)extract the number of words in a sentence.
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How to write a code for replacing a character with astrick sign?
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How to write c++ program to write a message to the screen?
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I was creating a program that has a 2 dimensional array with 25 elements.How can I display the highest row sum?
lowest row sum?
highest col sum?
lowest row sum?
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How do you write a program which produces its own source code as its output?

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Is it possible to have different access modifiers on the get/set methods of a property?
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Bitwise Operations - Given inputs X, Y, Z and operations | and & (meaning bitwise OR and AND, respectively), what is output equal to in?
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Can we make any program in c++ without using any header file and what is the shortest program in c++.
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HOW TO READ TEXT FILE AND READ IT INTO ANOTHER TEXT FILE?
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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


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