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MCQ Practice Single Best Answer Topic: Function in C Language

Q What is the difference between call by value and call by reference in C language?

Question ID
#7186
Subchapter
Function in C Language
Action
Choose one option below

Choose Your Answer

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  • A Call by value passes the address of the argument to the function, while call by reference passes a copy of the argument value. ✔ ✖
  • B Call by value passes a copy of the argument value to the function, while call by reference passes a reference to the argument variable. ✔ ✖
  • C Call by value and call by reference are the same thing. ✔ ✖
  • D Call by value passes a reference to the argument variable, while call by reference passes a copy of the argument value. ✔ ✖
Correct Answer: B

Explanation

Answer: b. Call by value passes a copy of the argument value to the function, while call by reference passes a reference to the argument variable.

Explanation: In call by value, a copy of the argument value is passed to the function, while in call by reference, a reference to the argument variable is passed to the function. Call by reference allows the function to modify the argument variable, while call by value does not.

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