Which statement is false?

1. AAll function calls in C pass arguments using call by value
2. BCall by reference enables a called function to modify a variable in the calling function
3. CCall by value is always more efficient than call by reference
4. DProgrammers use pointers and indirection to simulate call by reference

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: C. Call by value is always more efficient than call by reference

Explanation

Call by value copies the argument, which is expensive for large structures, so it is not always more efficient. The other statements are true.