Hackerrank Algorithms

Question 1

What is a variable in programming?

Accepted Answer

A named storage location for data that can change during program execution

Answer

A fixed constant

Answer

A type of function

Answer

A programming language

Question 2

What is the time complexity of binary search?

Accepted Answer

O(log n)

Answer

O(n)

Answer

O(n²)

Answer

O(1)

Question 3

What is a list in Python?

Accepted Answer

An ordered, mutable collection of elements

Answer

An immutable sequence

Answer

A key-value pair

Answer

A single value

Question 4

What is a function in programming?

Accepted Answer

A reusable block of code that performs a specific task

Answer

A type of variable

Answer

A data format

Answer

An error message

Question 5

What is the difference between '==' and '=' in most programming languages?

Accepted Answer

'==' compares values; '=' assigns a value

Answer

They are the same

Answer

'=' compares; '==' assigns

Answer

Neither is valid

Question 6

What is a loop used for in programming?

Accepted Answer

To repeat a block of code multiple times

Answer

To store data

Answer

To define variables

Answer

To import libraries