Quiz Competition

1. What will be the output of the following code?

• [1], [2], [3], [4]

• [1], [1, 2], [3], [1, 2, 4]

• [1], [1, 2], [3], [1, 2, 3, 4]

• [1], [1, 2], [3], [3, 4]

Answer explanation

The default argument lst=[] is mutable. It retains its state between function calls unless explicitly overridden.

2. What will be the output?

• [1, 2, 3]

• Error

• [1, 2, 3, [4, 5]]

• [1, 2, 3, 4, 5]

Answer explanation

Since y = x, both variables point to the same list. The += operation modifies the existing list, so x also gets updated.

3. What is the output of this code?

• [1], [2], [3]

• [1], [2, 3], [1, 3]

• [1], [2], [1, 3]

• [1], [2], [1, 2, 3]

Answer explanation

Similar to Question 1, the default mutable list retains its state across function calls.

4. What will be the output?

• True

• False

• None

• Error

Answer explanation

Any non-empty string in Python is truthy, regardless of its content.

5. What is the result of this expression?

• True

• False

• None

• Error

Answer explanation

Due to floating-point precision errors, 0.1 + 0.2 is not exactly 0.3, but rather 0.30000000000000004.

6. What does this return?

• [1, 2, 3, 4, 5]

• {1, 2, 2, 3, 4, 4, 5}

• Error

• {1, 2, 3, 4, 5}

Answer explanation

A set only stores unique elements.

7. Which of the following is immutable in Python?

• List

• Tuple

• Dictionary

• Set

Answer explanation

Lists, dictionaries, and sets are mutable, while tuples are immutable.

8. What will be the output?

• nohtyP

• Error

• nohtyP nohtyP

• thonPy

Answer explanation

[::-1] reverses the string.

9. Which data type is the most memory-efficient for a large number of unique items?

• Dictionary

• Tuple

• List

• Set

Answer explanation

Sets provide fast lookups and store unique values efficiently.

10. What will be the output of this code?

• [1, 2, 3, 1, 2, 3]

• Error

• [2, 4, 6]

• [1, 2, 3]

Answer explanation

Multiplying a list replicates its elements.