NTA Computer Science and Technology

Question 1

Which data structure operates on a LIFO (Last In, First Out) principle?

Accepted Answer

Stack

Answer

A stack follows LIFO, where the last element inserted is the first one to be removed.

Question 2

What does HTML stand for?

Accepted Answer

HyperText Markup Language

Answer

HTML stands for HyperText Markup Language, the standard language for creating web pages.

Question 3

Which sorting algorithm has the best average-case time complexity?

Accepted Answer

Merge Sort

Answer

Merge Sort has an average-case time complexity of O(n log n), better than O(n²) algorithms.

Question 4

In binary, the decimal number 10 is represented as:

Accepted Answer

1010

Answer

10 in decimal = 8+2 = 2³+2¹, which is represented as 1010 in binary.

Question 5

Which protocol is used to send email over the internet?

Accepted Answer

SMTP

Answer

SMTP (Simple Mail Transfer Protocol) is the standard protocol used for sending emails.

NTA - National Testing Agency Practice Test