Question Detail

ios::trunc is used for ?

If the file is opened for output operations and it already existed, no action is taken.
If the file is opened for output operations and it already existed, its previous content is deleted and replaced by the new one.
If the file is opened for output operations and it already existed, then a new copy is created.
None of above

Answer: Option B

Similar Questions :

1. Calling the stream's member function sync() causes an immediate synchronization.

True
False

Answer: Option A

2. Which among following is correct syntax of closing a file in c++ ?

myfile$close();
myfile@close();
myfile:close();
myfile.close();

Answer: Option D

3. Which stream class is to only write on files ?

ofstream
ifstream
fstream
iostream

Answer: Option A

4. ios::trunc is used for ?

If the file is opened for output operations and it already existed, no action is taken.
If the file is opened for output operations and it already existed, its previous content is deleted and replaced by the new one.
If the file is opened for output operations and it already existed, then a new copy is created.
None of above

Answer: Option B

5. Which functions allow to change the location of the get and put positions ?

sg() and sp()
sekg() and sekp()
gog() and gop()
seekg() and seekp()

Answer: Option D

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