1. Predict the Output: Variable Assignment

Question:
What will be printed by this code?

python

a = 5 b = a a = 10 print(b)

Walk-through:

• a is set to 5.

• b is set to a (so b is 5).

• a is changed to 10, but b remains 5.
  Answer:
  5
  Concept: Variables store values, not references.

2. Mutable vs Immutable Types

Question:
What will be printed by this code?

python

x = [1, 2, 3] y = x x.append(4) print(y)

Walk-through:

• x and y both refer to the same list object.

• Modifying x also changes y.
  Answer:
  [1, 2, 3,[4]
  Concept: Lists are mutable and assignments copy references.

3. String Immutability

Question:
What does this code print?

python

s = "hello" t = s s = s.upper() print(t)

Walk-through:

• t is assigned the value "hello".

• s.upper() creates a new string; t is unchanged.
  Answer:
  hello
  Concept: Strings are immutable.

4. Operator Precedence

Question:
What will this code print?

python

result = 2 + 3 * 4 print(result)

Walk-through:

• Multiplication happens before addition.

• 3 * 4 = 12; then 2 + 12 = 14.
  Answer:
  14
  Concept: Operator precedence.

5. Conditional Logic

Question:
What will be printed?

python

x = 10 if x > 5: print("A") elif x > 0: print("B") else: print("C")

Walk-through:

• x > 5 is True, so "A" is printed and the rest is skipped.
  Answer:
  A
  Concept: If-elif-else logic.

6. Loop with Range

Question:
How many times will "Hi" be printed?

python

for i in range(2, 10, 2): print("Hi")

Walk-through:

• range(2, 10, 2) gives 2, 4, 6, 8 (four numbers).
  Answer:
  4 times
  Concept: Understanding the range function.

7. FizzBuzz Logic

Question:
What will be printed for i = 15 in this code?

python

i = 15

if i % 15 == 0:

print("FizzBuzz")

elif i % 3 == 0:

print("Fizz")

elif i % 5 == 0:

print("Buzz")

else: print(i)

Walk-through:

• 15 % 15 == 0 is True, so "FizzBuzz" is printed.
  Answer:
  FizzBuzz
  Concept: Multiple conditions and order.

8. List Comprehension

Question:
What will this print?

python

nums = [1, 2, 3, 4] squares = [n**2 for n in nums] print(squares)

Walk-through:

• Each number is squared: 1, 4, 9, 16.
  Answer:
  [1,[4][9][16]
  Concept: List comprehensions.

9. Dictionary Key Access

Question:
What will this code print?

python

d = {"a": 1, "b": 2} print(d.get("c", 3))

Walk-through:

• .get("c", 3) returns 3 because "c" is not a key in the dictionary.
  Answer:
  3
  Concept: Dictionary .get() method and default values.

10. Function with Default Parameter

Question:
What is the output?

python

def greet(name="World"): print("Hello,", name) greet() greet("Alice")

Walk-through:

• First call uses default, prints "Hello, World".

• Second call passes "Alice", prints "Hello, Alice".
  Answer:

text

Hello, World Hello, Alice

Concept: Default function parameters.