Top 50+ Most important C++ Interview Questions

C++ mcqs for interviews and exam preparation for all levels of education. Object oriented programming basic mcqs. share on

C++ Questions and Answers

  • In C++ generally the near pointer take 2 bytes. The size of pointer to pointer to float will take:
    • 6 bytes
    • 4 bytes
    • 2 bytes
    • 8 bytes
  • A pure virtual function is a virtual function that:
    • caused its class to be abstract
    • return nothing
    • is used in a base class
    • takes no arguments
    • Note: You can choose more than one option.
  • If you want to sort many large objects or structures, the most efficient way would be:
    • place them in an array and sort the array
    • place pointer to them in an array and sort the array
    • place them in a linked list and sort the linked list
  • A global variable is defined in file F1. To access the variable in file F2, you must:
    • define it in F1 using extern
    • define it in F2 using keyword extern
    • declare it in F2 using keyword extern
    • define it in F3 using extern
  • To be accessed from a member function of the derived class, data or functions in the base class must be:
    • public
    • protected
    • public or protected


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  • Actual code for a template function is generated when:
    • the function declaration appears in the source code
    • the function definition appears in the source code
    • a call to function appears in the source code
    • the function declaration appears in the source code
  • Signature of the function include…
    • Number of parameter
    • Types of parameters
    • Function name
    • All of above
  • A break statement inside a nested if, will do what:
    • The control will be transferred to the outer if
    • The control will be returned back to next statement in the outer scope
    • It will be an error
    • A break statement inside a swtich if, will do what:
  • If there are more initializers then the number of variables then:
    • compiler will ignore
    • compiler will give an error
  • Exceptions are thrown:
    • from a throw statement to a catch block
    • from the throw statement to a try block
    • from the print of error to a catch block

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