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Python Functions & Lambdas MCQs

MCQs on Python def, *args, **kwargs, lambda functions, and scope rules.

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Deep-dive into Functions & Lambdas principles within Python. These targeted questions evaluate edge-cases, common pitfalls, and interview problem patterns.

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Functions & Lambdas MCQ Questions

Page 1 of 1 (5 total)
Q1

What is a lambda expression in Java used for?

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Correct Answer: It provides a concise way to represent an instance of a functional interface, often for short pieces of behavior
Explanation:
Lambda expressions were introduced to reduce the verbosity of anonymous inner classes, especially when working with interfaces that have a single abstract method, such as Runnable or Comparator.
Q2

What is the purpose of Python's 'map()' function?

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Correct Answer: It applies a given function to every item in an iterable and returns an iterator of the results
Explanation:
map() is often used with a lambda or named function to transform each element of a list, such as squaring every number, without writing an explicit loop.
Q3

What is a Python f-string used for?

easy
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Correct Answer: It provides a convenient way to embed expressions directly inside string literals for formatting
Explanation:
Introduced in Python 3.6, f-strings let you write something like f'Hello {name}' to insert the value of a variable directly, which is generally more readable than older formatting methods.
Q4

What is the purpose of Python's '*args' and '**kwargs' when combined in a single function definition?

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Correct Answer: They allow a function to accept any number of positional arguments and any number of keyword arguments respectively
Explanation:
*args collects extra positional arguments into a tuple, while **kwargs collects extra keyword arguments into a dictionary, giving functions a great deal of flexibility.
Q5

What is the syntax used in Python to accept an arbitrary number of keyword arguments?

easy
View Answer & Explanation
Correct Answer: **kwargs
Explanation:
**kwargs captures arbitrary keyword arguments as a dictionary.