C++ Interview Question and Answers

31. What is file scope?
 
  • A variable declared all blocks and functions (precisely main ()) has the scope of a file.
  • The scope of a file scope variable is the entire program. The life time of a file scope variable is the life time of a program.
 
Your Name Your Email-ID
Your Answer
`
32. How many types of variable scopes are there? What are they?
  Scope refers to the accessibility of a variable. There are four types of scopes in C++. They are:
  • Local scope
  • File scope
  • Function scope
  • Class scope
 
Your Name Your Email-ID
Your Answer
33. What are the two methods used in functions?
  In C++, functions that have arguments can be invoked by
  • Call by value and
  • Call by reference
 
Your Name Your Email-ID
Your Answer
34. What is an inline function?
 
  • An inline looks like a normal function in the source file but inserts the function's code directly into the calling program.
  • Inline functions execute faster but require more memory space.
 
Your Name Your Email-ID
Your Answer
35. What is the use of parameters passing in function?
 
  • The call statement communicates with the function through arguments or parameters.
  • Parameters are the channels through which data flows from call statement to function and vice versa.
 
Your Name Your Email-ID
Your Answer
12345678910 Page 7 of 10