Hackerrank - HackerRank Python Functions and Modularity Questions and Answers

Question 1

What is the primary characteristic of a lambda function in Python?

Accepted Answer

It is an anonymous function.

Answer

It can contain multiple expressions.

Answer

It must be assigned to a variable.

Answer

It uses the 'def' keyword for creation.

Question 2

Consider the following Python code snippet:

```python
def add_item(item, my_list=[]):
    my_list.append(item)
    return my_list

list1 = add_item('a')
list2 = add_item('b')

print(list2)
```

What will be the output?

Accepted Answer

['a', 'b']

Answer

['b']

Answer

['a']

Answer

A syntax error will occur.

Question 3

Which of the following describes the correct order of scope resolution in Python according to the LEGB rule?

Accepted Answer

Local, Enclosing, Global, Built-in

Answer

Global, Enclosing, Local, Built-in

Answer

Local, Global, Enclosing, Built-in

Answer

Built-in, Global, Enclosing, Local

Question 4

A developer wants to add logging functionality to several functions without modifying their original code. This logging should occur every time the function is called. Which Python feature is most suitable for this scenario?

Accepted Answer

Decorators

Answer

Lambda Functions

Answer

List Comprehensions

Answer

Conditional Statements

Question 5

What is the primary advantage of using `import math` over `from math import *` when working with modules in a large Python script?

Accepted Answer

It prevents namespace pollution and improves code readability.

Answer

It is faster because it only imports the module object once.

Answer

It allows you to use math functions without the 'math.' prefix.

Answer

It consumes significantly less memory.

Question 6

A function is defined with some parameters having default values. Which rule must be followed regarding the order of these parameters in the function definition?

Accepted Answer

Parameters with default values must be placed at the very end, after all non-default parameters.

Answer

Parameters with default values must be placed at the beginning, before all non-default parameters.

Answer

The order does not matter; default and non-default parameters can be mixed.

Answer

All parameters must have default values if at least one does.