B2 Programming Mastery Quiz

Which statement best describes why functions are used in programming?

• To increase the number of variables

• To make code longer

• To group reusable logic into a named block

• To replace loops

What is missing from this function? def check(age): if age >= 18: print("Adult")

• A parameter

• A return statement

• A loop

• A variable declaration

Which version correctly returns whether someone is old enough?

• def check(age): if age >= 18: print(True)

• def check(age): return age >= 18

• def check(age): age >= 18

• def check(age): return print(age >= 18)

Which best describes a count-controlled loop?

• A loop that runs while a condition is true

• A loop that runs forever

• A loop that runs a fixed number of times

• A loop that only runs once

Which loop is typically used when the number of repetitions is unknown?

• for loop

• while loop

• if statement

• function

In Bubble Sort, what happens after the first full pass?

• The smallest element is in the middle

• The largest element is at the end

• The list is fully sorted

• Nothing changes

Why does the inner loop in Bubble Sort use: range(0, n - 1 - i)

• To reduce comparisons after each pass

• To increase speed randomly

• To skip even numbers

• To reverse the list

What is the worst-case time complexity of Bubble Sort?

• O(n)

• O(log n)

• O(n²)

• O(1)

What is wrong with this bubble sort attempt? for i in range(len(arr)): if arr[i] > arr[i+1]:

• Missing nested loop

• Missing variable

• Wrong comparison operator

• It is correct

What does a binary search require?

• A list of strings

• A sorted list

• A loop

• A dictionary