CodeHS Programming Language Accreditations 2

Question 1

In CodeHS Python, what does the `len()` function return when called on a list?

Accepted Answer

The number of elements in the list

Answer

`len()` returns the count of items in the list.

Question 2

Which Java keyword is used to prevent a class from being subclassed?

Accepted Answer

final

Answer

The `final` keyword on a class declaration prevents inheritance.

Question 3

In JavaScript, what is the output of `typeof null`?

Accepted Answer

"object"

Answer

`typeof null` returns `"object"` due to a historical bug in JavaScript that was never fixed.

Question 4

Which Python data structure uses key-value pairs?

Accepted Answer

Dictionary

Answer

Dictionaries store data as key-value pairs using curly braces `{}`.

Question 5

In Java, which access modifier makes a member accessible only within the same class?

Accepted Answer

private

Answer

The `private` modifier restricts access to the declaring class only.

(CodeHS) Code High School Certifications Practice Test