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CuriousTab

CuriousTab

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Home C++ Programming References See What Others Are Saying!
  • Question
  • Functions can be declared to return a reference type. There are reasons to make such a declaration/Which of the following reasons are correct?

    1. The information being returned is a large enough object that returning a reference is more efficient than returning a copy.
    2. The type of the function must be a R-value.


  • Options
  • A. Only 1 is correct.
  • B. Only 2 is correct.
  • C. Both 1 and 2 are correct.
  • D. Both 1 and 2 are incorrect.

  • Correct Answer
  • Both 1 and 2 are correct. 


  • More questions

    • 1. What will be the output of the following program?
      #include<iostream.h> 
      class CuriousTabTeam
      {
          int x, y; 
          public:
          CuriousTabTeam(int xx)
          {
              x = ++xx;
          }
          void Display()
          {
              cout<< --x << " ";
          }
      };
      int main()
      {
          CuriousTabTeam objBT(45);
          objBT.Display();
          int *p = (int*)&objBT;
          *p = 23;
          objBT.Display();
          return 0; 
      }

    • Options
    • A. 45 22
    • B. 46 22
    • C. 45 23
    • D. 46 23
    • Discuss
    • 2. A class's __________ is called when an object is destroyed.

    • Options
    • A. constructor
    • B. destructor
    • C. assignment function
    • D. copy constructor
    • Discuss
    • 3. A constructor that accepts __________ parameters is called the default constructor.

    • Options
    • A. one
    • B. two
    • C. no
    • D. three
    • Discuss
    • 4. Which one of the following is correct about the statements given below?

      1. All function calls are resolved at compile-time in Procedure Oriented Programming.
      2. All function calls are resolved at compile-time in OOPS.

    • Options
    • A. Only II is correct.
    • B. Both I and II are correct.
    • C. Only I is correct.
    • D. Both I and II are incorrect.
    • Discuss
    • 5. How can we make a class abstract?

    • Options
    • A. By making all member functions constant.
    • B. By making at least one member function as pure virtual function.
    • C. By declaring it abstract using the static keyword.
    • D. By declaring it abstract using the virtual keyword.
    • Discuss
    • 6. Copy constructor must receive its arguments by __________ .

    • Options
    • A. either pass-by-value or pass-by-reference
    • B. only pass-by-value
    • C. only pass-by-reference
    • D. only pass by address
    • Discuss
    • 7. What will happen if a class is not having any name?

    • Options
    • A. It cannot have a destructor.
    • B. It cannot have a constructor.
    • C. It is not allowed.
    • D. Both A and B.
    • Discuss
    • 8. cout is a/an __________ .

    • Options
    • A. operator
    • B. function
    • C. object
    • D. macro
    • Discuss
    • 9. What is the technical word for the function ~CuriousTab() defined in the following program?
      #include<iostream.h> 
      class CuriousTab
      {
          int x, y; 
          public:
          CuriousTab(int xx = 10, int yy = 20 )
          {
              x = xx; 
              y = yy;
          }
          void Display()
          {
              cout<< x << " " << y << endl;
          } 
          ~CuriousTab()
          { } 
      };
      int main()
      {
          CuriousTab objCuriousTab; 
          objCuriousTab.Display(); 
          return 0;
      }

    • Options
    • A. Constructor
    • B. Destructor
    • C. Default Destructor
    • D. Function Template
    • Discuss
    • 10. Which of the following statements is correct?

      1. Once a reference variable has been defined to refer to a particular variable it can refer to any other variable.
      2. A reference is not a constant pointer.

    • Options
    • A. Only 1 is correct.
    • B. Only 2 is correct.
    • C. Both 1 and 2 are correct.
    • D. Both 1 and 2 are incorrect.
    • Discuss


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