Python Lambda Function Quiz
1. What is the output? f = lambda x: x * 2 print(f(5))
A. 25
B. 10
C. 7
D. 5
2. What is the output? add = lambda a, b: a + b print(add(3, 7))
A. 10
B. 4
C. 37
D. 21
3. What is the output? square = lambda x: x ** 2 print(square(4))
A. 16
B. 6
C. 8
D. 12
4. What is the output? nums = [1, 2, 3, 4] result = list(map(lambda x: x * 2, nums)) print(result)
A. [2, 3, 4, 5]
B. [1, 2, 3, 4]
C. [2, 4, 6, 8]
D. [1, 4, 9, 16]
5. What is the output? nums = [1, 2, 3, 4, 5] result = list(filter(lambda x: x % 2 == 0, nums)) print(result)
A. [2, 4]
B. [2, 3, 4]
C. [1, 2, 3, 4]
D. [1, 3, 5]
6. What is the output? nums = [3, 1, 2] result = sorted(nums, key=lambda x: x) print(result)
A. [3, 2, 1]
B. [2, 1, 3]
C. [1, 2, 3]
D. [3, 1, 2]
7. What is the output? f = lambda x: x + 10 print(f(2) * 3)
A. 36
B. 16
C. 26
D. 6
8. What is the output? multiply = lambda a, b: a * b print(multiply(4, 5))
A. 9
B. 45
C. 1
D. 20
9. What does a Python lambda expression return when its expression is evaluated?
A. Always None
B. Always a Boolean
C. The evaluated expression result
D. Always a string
10. What is the output? words = ["cat", "elephant", "dog"] result = sorted(words, key=lambda x: len(x)) print(result)
A. ['cat', 'dog', 'elephant']
B. ['cat', 'elephant', 'dog']
C. ['dog', 'cat', 'elephant']
D. ['elephant', 'cat', 'dog']
1 comment:
What is the output?
f = lambda x: x \* 2 print(f(5))
The lambda multiplies its argument by 2, so f(5) produces 10.
What is the output?
add = lambda a, b: a + b print(add(3, 7))
The lambda adds its two arguments, so 3 + 7 equals 10.
What is the output?
square = lambda x: x 2 print(square(4))
The expression 4 \*\* 2 evaluates to 16.
What is the output?
nums = \[1, 2, 3, 4\] result = list(map(lambda x: x \* 2, nums)) print(result)
Each element is multiplied by 2, producing this list.
What is the output?
nums = \[1, 2, 3, 4, 5\] result = list(filter(lambda x: x % 2 == 0, nums)) print(result)
The condition x % 2 == 0 is true for the even values 2 and 4.
What is the output?
nums = \[3, 1, 2\] result = sorted(nums, key=lambda x: x) print(result)
The key returns each number itself, so sorted() orders the values in ascending order.
What is the output?
f = lambda x: x + 10 print(f(2) \* 3)
The lambda first produces 12 from 2 + 10, and 12 × 3 equals 36.
What is the output?
multiply = lambda a, b: a \* b print(multiply(4, 5))
The lambda multiplies 4 by 5, giving 20.
What does a Python lambda expression return when its expression is evaluated?
A lambda returns the value produced by its expression when it is called.
What is the output?
words = \["cat", "elephant", "dog"\] result = sorted(words, key=lambda x: len(x)) print(result)
The key returns each word's length, so the words are ordered from shortest to longest: 3, 3, 8.
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