Which device is used mainly to type letters, numbers and commands into a computer?
Computer Systems
Question · Easy
This bouncer is a firewall
Short
What is the main role of the Central Processing Unit (CPU)?
Which type of memory loses its contents when the computer is switched off?
Which of the following is an output device?
Which statement correctly compares an SSD with a magnetic hard disk drive (HDD)?
Question · Medium
Which component of the CPU performs arithmetic and logical operations?
Cache memory is best described as:
Which of the following is an example of system software?
What is the main difference between a compiler and an interpreter?
In the fetch–decode–execute cycle, which unit decodes the fetched instruction?
Question · Hard
Which input method is designed to read the magnetic ink characters printed along the bottom of a bank cheque?
A school laboratory wants backup power so that work is not lost during a short blackout. Which device is most appropriate?
Which statement about ROM is correct?
Using the 1024 convention common in Ordinary Level work, how many megabytes are there in 4 GB?
Which of these is a typical function of an operating system?
Disk defragmentation, antivirus scanning and file compression are examples of:
How many bits are there in one byte?
Data Representation
What is the denary (decimal) value of the binary number 1011?
What is the denary value of the hexadecimal number 2F?
In standard ASCII, which statement is true?
Convert the binary number 11010110 to denary.
Which unit is the smallest?
Why do computer scientists often use hexadecimal instead of long binary strings?
An uncompressed bitmap is 200 pixels wide, 100 pixels high and uses 24 bits per pixel. What is the file size in bytes (ignore header data)?
A 5-second mono sound clip is sampled at 8000 Hz with 8 bits per sample. What is the uncompressed file size in bytes?
Increasing the colour depth of a bitmap from 8 bits to 24 bits per pixel will:
The binary number 0011 is equal to which hexadecimal digit?
The 7-bit data 1011001 is to be sent with an even parity bit added on the left. Which 8-bit pattern is sent?
Which application is most suitable for typing a formal letter and then printing it?
Applications
A teacher wants to calculate totals and averages of test marks for a class of 40. Which application is most appropriate?
What does mail merge do in a word processor?
In a spreadsheet, cell A1 contains 10 and B1 contains 4. What does =A1*B1+2 calculate?
A formula in cell D5 is =$B$2*C5. The formula is copied down to D6. What appears in D6?
Hours worked are in A2 and the hourly rate is in B2. Overtime after 8 hours is paid at 1.5 times the rate. Which formula correctly calculates pay?
Which file-management action creates a second copy of a file in another folder without removing the original?
A candidate is preparing a 10-slide talk on computer networks. Which application is most suitable?
Which spreadsheet function returns the arithmetic mean of the values in cells B2 to B21?
In HTML, which tag correctly creates a hyperlink to https://www.exams-council.org.zm?
A vector drawing of the Zambian flag is enlarged to fill a poster. Why does it usually stay sharp, unlike a small bitmap?
Which statement about a command-line interface (CLI) compared with a graphical user interface (GUI) is correct?
A network that links computers in one school building is best described as a:
Networking
In a star topology, each workstation connects to:
Which device forwards frames only to the port where the destination MAC address is located?
What is the role of a router on a school network that also uses the internet?
Which statement correctly contrasts a MAC address with an IPv4 address?
Which protocol is used to request and display ordinary web pages?
How does HTTPS differ from HTTP?
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