C++ interview questions part 21
C++ interview questions part 21
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. By seeing which operator thus this program stops getting the input?
#include #include using namespace std; int main () { char ch; streambuf * p; ofstream os ("test.txt"); pbuf = os.rdbuf(); do { ch = cin.get(); p -> sputc(ch); } while (ch != '.'); os.close(); return 0; }
Correct Answer is : Depends on the compiler
2. Which member function is used to determine whether the stream object is currently associated with a file?
Correct Answer is : std:map
3. Which header file is used for reading and writing to a file?
Correct Answer is : Iterator
4. Which of the following is not one of the sizes of the floating point types?
Correct Answer is : Iterator type
5. Which of the following is a valid floating-point literal?
Correct Answer is : both start & finish
6. What is the range of the floating point numbers?
Correct Answer is : no return type
7. Which of three sizes of floating point types should be used when extended precision is required?
Correct Answer is : result of the type conversion is a valid
8. Which is used to indicate single precision value?
Correct Answer is : 4
9. Which is correct with respect to size of the data types?
Correct Answer is : converted
10. Which is used for formatting purpose in c++?
Correct Answer is : 2110
11. How many number of spaces should be set in default tab?
Correct Answer is : 2
12. What can be improved by formatting the source code?
Correct Answer is : operator float()const
13. Choose the correct formatted code.
Correct Answer is : 1 declares i,2 declares and defines i
14. Which function allows you to set minimum width for the next input?
Correct Answer is : only 4
15. What is the use of the function “showbase”?
Correct Answer is : Yes, but not a very efficient way to write programs
16. Which is used to allocate and deallocate storage for objects during the execution?
Correct Answer is : 234
17. Which operators are used in the free store?
Correct Answer is : error
18. What type of class member is operator new?
Correct Answer is : Statement 1 and 3 are wrong
19. What must be an operand of operator delete?
Correct Answer is : the number you entered
20. How can object be allocated outside the object lifetime?
Correct Answer is : 1st value: 1
