ICAS Digital Systems and Programming 4

Question 1

What is the hexadecimal representation of the decimal number 255?

Accepted Answer

FF

Answer

255 in decimal equals FF in hexadecimal because 15×16 + 15 = 255.

Question 2

What does 'iteration' mean in the context of programming?

Accepted Answer

Repeating a block of code multiple times

Answer

Iteration refers to repeating a set of instructions, typically using a loop construct.

Question 3

Which of the following best describes the Internet?

Accepted Answer

A global network of interconnected computers

Answer

The Internet is a massive global network that interconnects millions of computers and devices worldwide.

Question 4

In a spreadsheet, what does a formula beginning with '=' do?

Accepted Answer

Performs a calculation or operation

Answer

In spreadsheet software, a formula beginning with '=' instructs the program to calculate or process data in that cell.

Question 5

What is the main role of an operating system?

Accepted Answer

To manage hardware resources and provide services for programs

Answer

An operating system manages the computer's hardware and provides a platform for applications to run.

(ICAS) ICAS Practice Test