Mettl Fundamental Coding Skills 5

Question 1

What is the output of: `print(2 ** 3)` in Python?

Accepted Answer

8

Answer

The `**` operator in Python is the exponentiation operator, so `2 ** 3` equals 2³ = 8.

Question 2

Which of the following is a valid way to comment out a single line in Python?

Accepted Answer

# This is a comment

Answer

Python uses the `#` character to start a single-line comment; everything after `#` on that line is ignored.

Question 3

What is a stack overflow error typically caused by?

Accepted Answer

Unbounded recursion filling the call stack

Answer

A stack overflow occurs when recursive function calls accumulate without hitting a base case, exhausting the call stack's memory.

Question 4

Which of the following best describes a 'variable scope'?

Accepted Answer

The region of code where a variable can be accessed

Answer

Scope defines the region of the program where a variable is visible and can be referenced.

Question 5

What does DRY stand for in software development?

Accepted Answer

Don't Repeat Yourself

Answer

DRY (Don't Repeat Yourself) is a principle that encourages reducing code duplication by abstracting repeated logic.

Mettl Practice Test