C++ Developer - Parameter Passing: Pass-By-Value and Pass-By-Reference

The video tutorial covers user-defined functions, focusing on parameter passing schemes. It explains pass by value, where a copy of the argument is used, and pass by reference, which allows direct modification of the argument. The tutorial includes coding examples and a challenge exercise to reinforce learning.

What is the primary purpose of user-defined functions?

• To store data permanently

• To handle user inputs

• To perform specific tasks and operations

• To manage memory allocation

In pass by value, what happens to the argument passed to a function?

• It is deleted after use

• A copy is made and used within the function

• It is ignored

• It is modified directly

Why does changing a parameter in a function not affect the original argument in pass by value?

• Because the parameter is a reference to the original argument

• Because the parameter is a copy of the original argument

• Because the parameter is a constant

• Because the parameter is a global variable

What is the key difference between pass by value and pass by reference?

• Pass by value uses pointers, pass by reference does not

• Pass by reference allows modification of the original argument, pass by value does not

• Pass by reference is only used for integers

• Pass by value is faster than pass by reference

What symbol is used in C++ to denote a reference in pass by reference?

• #

• &

• *

• %

In the coding challenge, what is the purpose of the second parameter in the function?

• To hold a constant value

• To store the result of the multiplication

• To act as a temporary variable

• To store the input value

What is the expected output of the function in the coding challenge when the input is 100?

• 400

• 300

• 200

• 100

Why is it important to use variables instead of literals in pass by reference?

• Variables allow the function to modify the value

• Literals are faster to process

• Variables are easier to debug

• Literals are more readable

What is the main advantage of using pass by reference?

• It reduces memory usage

• It increases execution speed

• It allows functions to modify multiple variables

• It simplifies code readability

What concept will be covered in the next lecture following this video?

• Memory allocation

• Variable scope and lifetime

• Error handling

• Data structures