MCQ Quiz on Computer Systems

Sarah’s laptop is running slowly because too many programs are open. Which OS function should she use to fix this?

• File Explorer

• Task Manager

• Control Panel

• Disk Cleanup

A school wants to protect its computers from viruses. Which utility program should they install?

• Word Processor

• Antivirus Software

• Video Editor

• Calculator

Why does a smartphone need an operating system?

• To play games faster

• To manage apps, memory, and user input

• To increase battery size

• To connect to Wi-Fi automatically

A computer stores the letter 'A' as 65 in denary. What is this system called?

• Binary

• ASCII

• Compression

• Unicode

Why is file compression used when sending photos over WhatsApp?

• To improve image quality

• To reduce file size for faster sharing

• To change the photo format to ASCII

• To encrypt the photo

Which type of compression permanently removes some data to reduce file size?

• Lossless

• Lossy

• Binary

• ZIP

A traffic light system turns green ONLY if the pedestrian button is pressed AND the timer has ended. Which logic gate represents this?

• OR

• AND

• NOT

• XOR

Convert the binary number 1101 to denary.

• 10

• 12

• 13

• 15

A NOT gate inverts input. If the input is 1, what is the output?

• 0

• 1

• 2

• No change

Why does a computer slow down when too many apps are open?

• ROM is full

• RAM is overloaded

• The CPU stops working

• The monitor is damaged