Python-Functions

What is the correct way to call a function named print_sum?

• 1. def print_sum():

  
  

• 1. print_sum

  
  

• 1. print_sum():

  
  

• 1. print_sum()

  Answered
  

Answer explanation

The correct way to call a function in Python is by using its name followed by parentheses. Therefore, 'print_sum()' is the correct choice, as it indicates a function call. The other options are either definitions or incomplete.

Which of the following is the correct way to declare a function in Python?

• print_hello:

  print("hello")

• function print_hello():

  print("hello")

• print_hello():

  print("hello")

• def print_hello():

  print("hello")

Answer explanation

The correct way to declare a function in Python is using the 'def' keyword. Thus, 'def print_hello(): print("hello")' is the right choice, as it properly defines a function named 'print_hello' that prints 'hello'.

Which of the following code samples correctly passes the number 10 as an argument to the function print_number?

• print_number(10)

• print_number()

  print 10

• 10(print_number)

• print print_number

  print 10

Answer explanation

The correct choice is print_number(10) because it directly calls the function print_number with 10 as an argument. The other options do not correctly pass 10 to the function.

Which of the following code samples correctly creates a function that takes a single parameter and prints it?

• def print_number(x):

  print(x)

• def print_number():

  print(parameter)

• def print_number():

  print(x)

• def print(x)

Answer explanation

The correct choice is 'def print_number(x): print(x)'. It defines a function that takes a parameter 'x' and prints it. The other options either lack parameters or reference undefined variables.

In which namespace is the variable ‘x’ defined in the following program?

• 1. Function namespace

• Global namespace

• Object namespace

• Class namespace

Answer explanation

The variable 'x' is defined in the global namespace because it is accessible throughout the program, not limited to a specific function, class, or object. Thus, the correct answer is the Global namespace.

Consider this code snippet.

Which of the following additional functions could be safely added to this code, without causing an error?

• def subtract_nums():

  z = x - y

  print(z)

• def subtract_nums():

  z = z - x

  print(z)

• def subtract_nums():

  y = 5

  z = x - y

  print(z)

• def subtract_nums():

  z = y

  z = x - y

  print(z)

Answer explanation

The correct choice defines 'y' locally, ensuring 'x' is used without errors. The other options either reference undefined variables or modify 'z' incorrectly, leading to potential errors.

Which of the following functions successfully returns the number 10?

• def my_function():

  10

• def my_function(10):

  return

• def my_function():

  return 10

• def my_function():

  print(10)

Answer explanation

The function 'def my_function(): return 10' correctly returns the number 10. The other options either do not return a value or do not use the return statement properly.

Which of the following functions successfully returns double the variable ‘number’?

• def my_function(number):

  return number*2

• def my_function(number*2):

  return

• def my_function():

  return number

• def my_function(number):

  number*2

Answer explanation

The correct function is 'def my_function(number): return number*2' because it takes 'number' as an argument and returns its double. The other options either have syntax errors or do not return the doubled value.

Which of the following programs will NOT cause an error?

• say_hi("Margaret")

  def say_hi(name):

  print("hi " + name)

• function say_hi(name):

  print("hi " + name)

• def say_hi(first_name="John", last_name="Doe"):

  print("hi " + first_name + " " + last_name)

  say_hi("Polly Pocket")

• def say_hi(first_name="John", last_name):

  print("hi " + first_name + " " + last_name)

  say_hi(‘Polly’, ‘Pocket’)

Answer explanation

The program 'def say_hi(first_name="John", last_name="Doe"):' defines a function with default parameters. Calling 'say_hi("Polly Pocket")' works because it matches the expected input format.

Which of the programs below will print the following output?
I would like a green balloon.

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