Week 6 - Functions (DCS1101)

Poll

If you had to check “Pass/Fail” for 10 students, would you rather copy the code 10 times or reuse something?

• Copy code 10 times

• Reuse something

Open Ended

Why do humans divide work into roles?

Multiple Choice

What is the main purpose of a function?

• The main purpose of a function is to display information.
• A function is designed to create user interfaces.
• The main purpose of a function is to perform a specific task or calculation.
• A function is used to store data temporarily.

Multiple Choice

Where is a function prototype usually written?

• In a comment section of the code.
• At the end of a source file.
• Within a function definition.
• In a header file or at the beginning of a source file.

Multiple Choice

Passing data by value means:

• The original data is modified directly.
• A copy of the data is passed, not the original.
• Data is passed as a reference to the original.
• Only the metadata of the data is shared.

Multiple Choice

What does the return statement do?

• The return statement exits a function and returns a value.

• The return statement creates a new variable in the function.
• The return statement deletes a function from memory.
• The return statement pauses a function and saves its state.

Multiple Choice

What is the best way to explain a global variable?

• A global variable is accessible throughout the entire program.
• A global variable is limited to a single function.
• A global variable can only be used in local scopes.
• A global variable is automatically deleted after use.

Multiple Choice

Which error happens if return type mismatches?

• Return type failure
• Type error
• Compilation error

• Mismatch exception

Open Ended

Write a function that displays a welcome message "Hello!".

Open Ended

Write a function that returns true if a score above 50 is a pass.

Multiple Choice

What is the error of this code?

int total() {

return "10";

}

• Type mismatch: returning a string instead of an integer.
• Missing a return statement in the function.
• Function name does not match its purpose.
• Returning an integer instead of a string.

Open Ended

What is the error of this code?

int add(int a, int b) {

cout << a + b;

}

Multiple Choice

What happens if a function has return type int but no return statement?

• The function will return zero.
• The function will cause a compilation error.
• The function will return a random value.
• Undefined behavior occurs.