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  • Question
  • Which of the following statements is correct?

    1. We can return a global variable by reference.
    2. We cannot return a local variable by reference.


  • 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
  • Only 2 is correct. 


  • References problems


    Search Results


    • 1. Which of the following statements is correct?

    • Options
    • A. Base class pointer cannot point to derived class.
    • B. Derived class pointer cannot point to base class.
    • C. Pointer to derived class cannot be created.
    • D. Pointer to base class cannot be created.
    • Discuss
    • 2. Why reference is not same as a pointer?

    • Options
    • A. A reference can never be null.
    • B. A reference once established cannot be changed.
    • C. Reference doesn't need an explicit dereferencing mechanism.
    • D. All of the above.
    • Discuss
    • 3. What is correct about the static data member of a class?

    • Options
    • A. A static member function can access only static data members of a class.
    • B. A static data member is shared among all the object of the class.
    • C. A static data member can be accessed directly from main().
    • D. Both A and B.
    • Discuss
    • 4. 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
    • 5. Which of the following keyword is used to overload an operator?

    • Options
    • A. overload
    • B. operator
    • C. friend
    • D. override
    • Discuss
    • 6. Which of the following statements is correct?

      1. Once the variable and the reference are linked they are tied together.
      2. Once the reference of a variable is declared another reference of that variable is not allowed.

    • 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
    • 7. Reference is like a _____.

    • Options
    • A. Pointer
    • B. Structure
    • C. Macro
    • D. Enum
    • Discuss
    • 8. Which of the following statement is correct about the references?

    • Options
    • A. A reference must always be initialized within functions.
    • B. A reference must always be initialized outside all functions.
    • C. A reference must always be initialized.
    • D. Both A and C.
    • Discuss
    • 9. Which of the following statement is correct?

    • Options
    • A. A referenced has to be de-referenced to access a value.
    • B. A referenced does not need to be de-referenced to access a value.
    • C. A referenced has to be double de-referenced to access a value.
    • D. Whether a reference should be de-referenced or not depends on the type of the reference.
    • Discuss
    • 10. 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.
    • Discuss


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