PCEP Exam Practice: Default Parameter Values in Python Functions

Question 1: What is the purpose of default parameter values in Python functions?

1. To enforce argument passing in the correct order.
2. To allow a function to be called without explicitly providing all arguments.
3. To restrict the number of arguments a function can accept.
4. To allow only positional arguments in a function.

Question 2: Which of the following are true about default parameter values? (Choose all that apply)

• Default parameter values must be specified last in the function definition.
• Default parameters can be overridden by passing values during the function call.
• Default parameter values are optional when calling the function.
• All function parameters must have default values.

Question 3: Complete the code to define a function greet with a default parameter name="Guest".

def greet(______="Guest"):
    print("Hello, " + name)

Question 4: What will be the output of the following code?

def add(a, b=5):
    return a + b

result = add(3)
print(result)

1. 8
2. 3
3. 5
4. Error

Question 5: Insert the correct default value for the parameter greeting in the function greet.

def greet(name, greeting=______):
    print(greeting + ", " + name)

greet("Alice")

Question 6: What will the following code output?

def multiply(x, y=2):
    return x * y

print(multiply(4))

1. 8
2. 4
3. 2
4. Error

Question 7: Which of the following statements are correct about defining and calling functions with default parameter values? (Choose all that apply)

1. You can call the function without providing arguments for parameters with default values.
2. Parameters with default values must always be provided during the function call.
3. Default values can be overridden by providing arguments during the function call.
4. Non-default parameters must come before default parameters in the function definition.

Question 8: Arrange the steps to define and call a function with default parameter values.

1. Print the result.
2. Define the function with a default parameter value.
3. Call the function without passing the default parameter.
4. Override the default parameter by passing a value during the function call.

Question 9: Complete the code to define a function subtract with a default parameter b=2.

def subtract(a, ______=2):
    return a - b

Question 10: What will be the output of the following code?

def greet(name="Guest", greeting="Hello"):
    print(greeting + ", " + name)

greet()

1. Hello, Guest
2. Guest, Hello
3. Hello,
4. Error

Question 11: Insert the correct default value for the parameter age in the function person_info.

def person_info(name, age=______):
    print(name + " is " + str(age) + " years old")

person_info("Alice")

Question 12: What will the following code output?

def calculate_area(length, width=10):
    return length * width

print(calculate_area(5))

1. 50
2. 10
3. 15
4. Error

Question 13: Which of the following function calls are valid for the following function definition? (Choose all that apply)

def display_info(name, age=25):
    print(name + " is " + str(age) + " years old")

1. display_info("Bob")
2. display_info("Bob", 30)
3. display_info(name="Alice", age=35)
4. display_info()

Question 14: Arrange the steps to define and call a function with a default parameter value.

1. Define the function with a default parameter.
2. Call the function without providing the default parameter.
3. Call the function and override the default parameter.
4. Print the results of both calls.

Question 15: Complete the code to define a function multiply with default parameter y=1.

def multiply(x, ______=1):
    return x * y

Question 16: What will be the output of the following code?

def greet(name, greeting="Hi"):
    print(greeting + ", " + name)

greet("Alice", "Hello")

1. Hi, Alice
2. Hello, Alice
3. Hello,
4. Error

17. Insert the correct default value for the parameter z in the function add.

def add(x, y, z=______):
    return x + y + z

Question 18: Which of the following function calls will result in using the default value?

def subtract(x, y=5):
    return x - y

1. subtract(10, 3)
2. subtract(x=7)
3. subtract(4, y=6)
4. subtract(5)

Question 19: Which of the following function definitions are valid regarding default parameter values? (Choose all that apply)

1. def my_func(a, b=2, c):
2. def my_func(a, b=2, c=3):
3. def my_func(a, b=1):
4. def my_func(a=5, b=6):

Question 20: Arrange the steps to define and call a function that multiplies two numbers with a default value for the second number.

1. Call the function with both arguments provided.
2. Define the function with the second parameter having a default value.
3. Call the function with only one argument.
4. Print the results of both calls.

Question 21: Complete the code to call the function greet with a default greeting value.

def greet(name, greeting="Hi"):
    print(greeting + ", " + name)

greet("John")

Question 22: What will be the output of the following code?

def power(base, exp=2):
    return base ** exp

print(power(3))

1. 9
2. 6
3. 3
4. Error

Question 23: Insert the correct default parameter value to define a function divide where the second argument defaults to 1.

def divide(x, y=______):
    return x / y

Question 24: What will be the result of the following code?

def greet(name="Guest", greeting="Hi"):
    print(greeting + ", " + name)

greet()

1. Hi, Guest
2. Guest, Hi
3. Hello,
4. Error

Question 25: Which of the following are valid ways to call the function def add(a, b=5):? (Choose all that apply)

1. add(2)
2. add(3, 4)
3. add(a=1)
4. add(b=6)