These are three sample questions from Bryq’s Python assessment, a coding test for hiring Python developers and data professionals. The full assessment covers three levels: beginner, intermediate, and advanced, from core data types to functional programming. Questions test both Python concepts and the ability to read code and predict its output, with four options and one correct answer each.
Beginner
Question
Which of the following is used to store a collection of items in a fixed, ordered sequence that cannot be modified?
Select your answer
Tuple
Dictionary
Set
List
WHY IS THIS THE CORECT ANSWER
A tuple is ordered and immutable: once created, its items cannot be changed, added or removed. Lists are ordered but mutable, while sets are unordered.
Intermediate
Question
What will be the output of the following code?
`x = {'a': 1, 'b': 2}
print(x.get(‘c’, 0))`
Select your answer
`0`
`''`
`None`
`Error`
WHY IS THIS THE CORECT ANSWER
The .get() method returns the supplied default value when a key is missing. Here that default is 0; with no default it would return None, and only square-bracket access (x[‘c’]) raises a KeyError.
Advanced
Question
What will be the output of the following code?
`numbers = [1, 2, 3, 4, 5]
result = list(map(lambda x: x ** 2, numbers))
print(result)`
Select your answer
`[1, 4, 9, 16, 25]`
`[2, 4, 6, 8, 10]`
`[1, 2, 3, 4, 5]`
`Error`
