Foundations-of-Programming-Python Foundations of Programming (Python) - E010 JIV1 Question and Answers

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Step 1: The function receives one parameter named num.

Step 2: To double a number, multiply it by 2.

Step 3: The function should return the result using the return statement.

Correct code:

def double_number(num):

return num * 2

Example:

print(double_number(5))

Output:

10

A terminal-based Python environment uses atext-based command line interface. In this environment, the user types commands directly into a terminal or command prompt.

For example, a user may start Python by typing:

python

When Python is started from a terminal, the interpreter can run in interactive mode, where it displays prompts such as > > > and waits for the user to enter Python commands. The official Python documentation explains that when commands are read from a terminal, the interpreter is in interactive mode.

A terminal-based environment is not mainly identified by graphical user interface elements, internet connectivity, or automatic file saving.

Therefore, the correct answer isC. Text-based command line interface.

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Step 1: The function receives two string parameters: first and last.

Step 2: The required format is the last name first, followed by a comma, a space, and then the first name.

Step 3: Use string concatenation to combine the values correctly.

Correct code:

def format_name(first, last):

return last + " , " + first

Example:

print(format_name( " John " , " Smith " ))

Output:

Smith, John

A Python while loop needs a condition and an indented code block.

Example:

count = 1

while count < = 3:

print(count)

count += 1

The condition is count < = 3. The indented block contains the code that runs while the condition is true. Python’s compound statement documentation includes while as a control-flow statement.

Therefore, the correct answer isA. A condition and an indented code block.

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Step 1: The function receives two parameters: bill and tip_percent.

Step 2: Convert the percentage into a decimal by dividing tip_percent by 100.

Step 3: Multiply the bill amount by that decimal value.

Correct code:

def calculate_tip(bill, tip_percent):

return bill * tip_percent / 100

Example:

print(calculate_tip(50, 20))

Output:

10.0

To run a Python script from the terminal, the terminal should be in the correct directory, or the full file path should be provided.

The cd command is commonly used to change directories before running the script.

Example:

cd Documents

python my_script.py

Python’s documentation explains that Python can execute a script when the interpreter is called with a filename argument.

Therefore, the correct answer isC. Use the cd command to navigate to the script ' s directory.

The loop:

for grade in grades:

print(grade)

processes every individual item in the list grades.

The variable grade represents the current item being processed. Python’s documentation explains that a for statement iterates over the items of a sequence in order.

Therefore, the correct answer isB. for grade in grades:.

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Step 1: In Python, upper is a string method.

Step 2: A method must be called using parentheses ().

Step 3: text.upper refers to the method itself, but it does not execute it.

Step 4: Use text.upper() to return the uppercase version of the string.

Correct code:

def make_uppercase(text):

return text.upper()

Example:

print(make_uppercase( " hello " ))

Output:

HELLO

The Python shell allows Python code to be entered and executed interactively, one line at a time.

Example:

> > > 2 + 3

5

Python’s documentation explains that when commands are read from a terminal, the interpreter is in interactive mode and prompts for the next command.

Therefore, the correct answer isA. Python shell.

The correct Python for loop syntax uses the keyword in.

Correct code:

for name in [ ' Alice ' , ' Bob ' , ' Carol ' ]:

print(name)

This loop processes each name in the list one at a time. Python’s documentation explains that a for statement iterates over the items of a sequence or iterable.

Therefore, the correct answer isA. for name in [ ' Alice ' , ' Bob ' , ' Carol ' ]:.

The string method join() combines the strings in an iterable using the string before .join() as the separator.

In this question, the separator is an empty string:

' ' .join([ ' Hello ' , ' World ' ])

Because the separator is empty, Python joins ' Hello ' and ' World ' directly together with no space or comma between them.

Result:

' HelloWorld '

The official Python documentation defines str.join() as returning a string made by joining the strings in the given iterable.

Therefore, the correct answer is B. ' HelloWorld ' .

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Step 1: The function receives one string parameter named text.

Step 2: Python slicing can be used to reverse a string.

Step 3: The slice [::-1] means start at the end of the string and move backward by one character at a time.

Step 4: Return text[::-1].

Correct code:

def reverse_string(text):

return text[::-1]

Example:

print(reverse_string( " hello " ))

Output:

olleh

A for loop is commonly used when a program needs to repeat code for each item in a sequence or for a specific number of times using range().

Example:

for number in range(5):

print(number)

This loop runs 5 times. Python’s documentation explains that the for statement iterates over items of a sequence or iterable.

Therefore, the correct answer isB. for loop.

Asetstores only unique elements. If duplicate values are added, Python keeps only one copy.

Example:

numbers = {1, 2, 2, 3}

print(numbers)

Output:

{1, 2, 3}

Python’s data structures documentation describes sets as collections with no duplicate elements.

Therefore, the correct answer isD. Set.

The loop condition is:

while count > 0:

At the start, count is 5, so the condition is true. The program prints the value of count.

However, inside the loop, the value of count is never changed. That means count always stays 5, so the condition count > 0 is always true. As a result, the loop runs forever.

A corrected version would be:

count = 5

while count > 0:

print(count)

count = count - 1

This decreases count by 1 during each loop iteration. Eventually, count becomes 0, and the condition count > 0 becomes false.

Therefore, the correct answer isB. It runs infinitely because count is never modified.