What is Python - Practice Questions & Exercises

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is Python primarily used for?

Python is a popular programming language. What is its main use?

A Building websites and web applications

B Cooking recipes automatically

C Designing physical buildings

D Driving cars without a driver

💡 Hint

Think about what programming languages help create.

Python is widely used to build websites, web apps, and many other software projects.

❓ Predict Output

intermediate

What is the output of this Python code?

Look at this code and tell what it prints:

print(type('Hello'))

Python

print(type('Hello'))

A <class 'int'>

B <class 'str'>

C Hello

D SyntaxError

💡 Hint

What type is a text inside quotes in Python?

Text inside quotes is a string, so type('Hello') returns <class 'str'>.

❓ Predict Output

advanced

What is the output of this Python code snippet?

What does this code print?

def greet(name):
    return f"Hello, {name}!"

print(greet('Alice'))

Python

def greet(name):
    return f"Hello, {name}!"

print(greet('Alice'))

A Hello, name!

B TypeError

C Hello, Alice!

D greet('Alice')

💡 Hint

Look at how the function uses the name inside the string.

The function returns a greeting with the given name inserted, so it prints 'Hello, Alice!'.

🧠 Conceptual

advanced

Which of these is NOT a feature of Python?

Python has many features. Which one below is NOT true about Python?

A It is easy to read and write

B It can run on many operating systems

C It supports multiple programming styles

D It requires manual memory management like C

💡 Hint

Think about how Python handles memory compared to lower-level languages.

Python manages memory automatically, unlike C which requires manual memory management.

❓ Predict Output

expert

What is the output of this Python code with a walrus operator?

What does this code print?

nums = [1, 2, 3, 4, 5]
if (n := len(nums)) > 3:
    print(f"List has {n} items")
else:
    print("List is small")

Python

nums = [1, 2, 3, 4, 5]
if (n := len(nums)) > 3:
    print(f"List has {n} items")
else:
    print("List is small")

A List has 5 items

B List is small

C SyntaxError

D TypeError

💡 Hint

The walrus operator assigns and returns the value in one step.

The length of the list is 5, which is greater than 3, so it prints 'List has 5 items'.

Practice

1. What is Python primarily used for?

easy

A. Designing buildings and architecture

B. Writing instructions for computers in a simple way

C. Cooking recipes automatically

D. Painting pictures with a brush

Solution

1. Step 1: Understand Python's purpose and compare options

   Python is a programming language used to tell computers what to do. Only Writing instructions for computers in a simple way describes writing instructions for computers simply, which matches Python's use.

2. Final Answer:

   Writing instructions for computers in a simple way -> Option B

3. Quick Check:

   Python = simple computer instructions [OK]

Hint: Python is for coding, not cooking or painting [OK]

Common Mistakes:

• Confusing Python with non-programming tasks
• Thinking Python is a tool for art or cooking
• Mixing Python with unrelated professions

2. Which of the following is the correct way to start a Python program?

easy

A. print('Hello, world!')

B. echo 'Hello, world!'

C. console.log('Hello, world!')

D. System.out.println('Hello, world!')

Solution

1. Step 1: Identify Python syntax for output and check options

   Python uses the print() function to show text on the screen. print('Hello, world!') uses print(), which is Python syntax; others belong to different languages.

2. Final Answer:

   print('Hello, world!') -> Option A

3. Quick Check:

   Python output uses print() [OK]

Hint: Python uses print() to show messages [OK]

Common Mistakes:

• Using commands from other languages like echo or console.log
• Confusing syntax from Java or JavaScript
• Missing parentheses in print function

3. What will this Python code print?

name = 'Alice'
print(f'Hello, {name}!')

medium

A. Hello, Alice!

B. Hello, name!

C. Hello, {name}!

D. Error: invalid syntax

Solution

1. Step 1: Understand f-string usage and replace variable

   The code uses an f-string to insert the value of variable name inside the string. Variable name is 'Alice', so the output becomes 'Hello, Alice!'.

2. Final Answer:

   Hello, Alice! -> Option A

3. Quick Check:

   f-string inserts variable value [OK]

Hint: f-strings show variable values inside strings [OK]

Common Mistakes:

• Thinking it prints the variable name as text
• Confusing f-string syntax with regular strings
• Expecting a syntax error due to unfamiliar syntax

4. Find the error in this Python code:

for i in range(3)
    print(i)

medium

A. Variable 'i' is not defined

B. Incorrect indentation of print statement

C. Missing colon ':' after range(3)

D. Wrong function name 'range'

Solution

1. Step 1: Check for syntax errors in for loop and identify issue

   Python requires a colon ':' at the end of the for statement line. The code misses ':' after range(3), causing a syntax error.

2. Final Answer:

   Missing colon ':' after range(3) -> Option C

3. Quick Check:

   for loops need ':' at end [OK]

Hint: Always put ':' after for loops [OK]

Common Mistakes:

• Forgetting the colon ':' after loop header
• Misaligning indentation but colon is more critical
• Thinking 'range' is misspelled

5. You want to create a simple Python program that asks for your name and then greets you. Which code correctly does this?

hard

A. input('Enter your name: ')
print('Hello, {name}!')

B. print('Enter your name: ')
name = input
print('Hello, name!')

C. name = input('Enter your name: ')
print('Hello, name!')

D. name = input('Enter your name: ')
print(f'Hello, {name}!')

Solution

1. Step 1: Use input() to get user input and f-string to greet

   name = input('Enter your name: ') print(f'Hello, {name}!') correctly assigns the input to variable name and uses f-string print(f'Hello, {name}!') to show the greeting with the actual name.

2. Final Answer:

   name = input('Enter your name: ') print(f'Hello, {name}!') -> Option D

3. Quick Check:

   input() + f-string greet = correct [OK]

Hint: Use input() to get text, f-string to show it [OK]

Common Mistakes:

• Not assigning input to a variable
• Printing variable name as text instead of value
• Missing parentheses in input or print