Covers: Functions, Error Handling, Decorators, Data Structures

Q1. What does *args capture in a function?

  • A) Keyword arguments
  • B) Variable positional arguments as a tuple ✓
  • C) Global variables
  • D) Default values

Q2. What is the output?

  def func(a, b=2, c=3):
    return a + b + c
print(func(1))
print(func(1, 5))
  • A) 6 then 9 ✓
  • B) Error then 9
  • C) 6 then 6
  • D) Error on both

Q3. Which exception is raised by int("abc")?

  • A) TypeError
  • B) ValueError ✓
  • C) KeyError
  • D) SyntaxError

Q4. What does finally do?

  • A) Runs only on success
  • B) Runs only on error
  • C) Always runs regardless of exceptions ✓
  • D) Re-raises the exception

Q5. What does @functools.lru_cache do?

  • A) Deletes old functions
  • B) Memoizes function results ✓
  • C) Limits recursion depth
  • D) Sorts function arguments

Q6. What is the time complexity of x in my_list for a list of n items?

  • A) O(1)
  • B) O(log n)
  • C) O(n) ✓
  • D) O(n²)

Sets and dicts offer O(1) membership testing.

Q7. What does import math as m do?

  • A) Imports only the m function
  • B) Imports math with alias m ✓
  • C) Imports from a file named m
  • D) Creates a new module

Q8. What is a generator?

  • A) A class that generates random numbers
  • B) A function that uses yield to produce values lazily ✓
  • C) A type of import
  • D) A database tool

Q9. What does raise ValueError("msg") from e do?

  • A) Ignores the original error
  • B) Chains the new exception to the original cause ✓
  • C) Prints a warning
  • D) Returns None

Q10. Which is the correct way to copy a nested list independently?

  • A) new = old.copy()
  • B) new = list(old)
  • C) new = copy.deepcopy(old) ✓
  • D) new = old[:]

Shallow copies share inner objects. Use copy.deepcopy() for full independence.

Scoring: 8+ = ready for Advanced Topics and Projects. Below 8 = review missed topics.

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