Subroutines - Procedures & Functions

What is the purpose of the return statement in a function?

• To terminate the function

• To print a value

• To return a value to the main program

• To declare a local variable

Answer explanation

The return statement in a function is used to return a value to the main program, allowing the function to pass back a result for further processing.

Which of the following code snippets correctly calls the clear_screen procedure with 5 as the parameter?

• clear_screen(5)

• clear_screen = 5

• clear_screen()

• clear_screen = 5()

Answer explanation

Explanation: To call a procedure, use its name followed by parentheses and any required parameters.

What is a subroutine in computer programming?

• A sequence of program instructions that perform a specific task

• A unit of code that can be reused in programs

• A way to structure and organize programming code

• All of the above

Answer explanation

A subroutine in computer programming is a sequence of program instructions that perform a specific task, a unit of code that can be reused in programs, and a way to structure and organize programming code. Therefore, the correct answer is 'All of the above.'

What is the correct syntax for defining a procedure in Python?

• PROCEDURE identifier(parameters):

• SUB identifier(parameters):

• FUNCTION identifier(parameters):

• def identifier(parameters):

Answer explanation

The correct syntax for defining a procedure in Python is 'def identifier(parameters):'.

Which type of subroutine returns a value to the main program?

• Procedure

• Function

• Both procedure and function

• Neither procedure nor function

Answer explanation

Explanation: Functions manipulate data and return a value to the main program.

What does the following function do?

• Converts Celsius to Fahrenheit

• Calculates the average temperature

• Prints a temperature value

• Converts Fahrenheit to Celsius

Answer explanation

Explanation: The function f_to_c converts a temperature from Fahrenheit to Celsius using the given formula.

Which of the following statements is true about local variables?

• They are used for complex calculations.

• They are confined to a specific section of code (e.g., within a subroutine).

• They can be accessed from any part of the program.

• They are global variables.

Answer explanation

Explanation: Local variables are declared within a subroutine (procedure or function) and are accessible only within that specific section of code.

What would be the output of the code snippet?

• Nothing

• print_hello

• Hello

• Hello!|
  Hello!
  Hello!
  Hello!
  Hello!

Answer explanation

The correct output is 'Hello!|
Hello!
Hello!
Hello!
Hello!' as the code snippet prints this string multiple times with line breaks.

What keyword is used to declare a function in Python?

• function

• return

• call

• def

Answer explanation

Explanation: The def keyword is used to define a function in Python. Functions can manipulate data and return a value.

What is the value of the variable result?

• 5

• 10

• 25

• 52

Answer explanation

The value of the variable result is 25 because it is the only correct answer choice provided.