Computing Mock 2025

WASSCE style · Study mode

Computing Mock 2025

Question 1 of 50

A network in which every device connects to a central switch or hub uses a

A. ring topology B. bus topology C. mesh topology D. star topology

Question 2 of 50

Which SQL command retrieves data from a table?

A. INSERT B. UPDATE C. DELETE D. SELECT

Question 3 of 50

An email that pretends to come from a bank and asks for your PIN is an example of

A. phishing B. a firewall C. encryption D. a backup

Question 4 of 50

Turning readable data into a coded form that only authorised people can read is called

A. compression B. encryption C. validation D. formatting

Question 5 of 50

Which of these is system software?

A. a web browser B. a word processor C. an operating system D. a game

Question 6 of 50

Antivirus and disk-cleanup programs are examples of

A. firmware only B. application suites C. programming languages D. utility software

Question 7 of 50

Software whose source code anyone may view, change and share is

A. malware B. proprietary software C. open-source software D. a device driver

Question 8 of 50

A network covering a single school building is a

A. GAN B. WAN C. MAN D. LAN

Question 9 of 50

Which device connects different networks and directs data between them?

A. keyboard B. router C. monitor D. scanner

Question 10 of 50

Network speed (bandwidth) is commonly measured in

A. volts B. grams C. bits per second D. pixels

Question 11 of 50

Breaking a big problem into smaller parts is

A. abstraction B. decomposition C. compilation D. encryption

Question 12 of 50

Finding similarities between problems so one solution can be reused is

A. decomposition B. pattern recognition C. compression D. sorting

Question 13 of 50

In HTML, which tag creates a hyperlink?

A. <img> B. <p> C. <a> D. <h1>

Question 14 of 50

Which language is mainly used to style the appearance of web pages?

A. Python B. HTML C. SQL D. CSS

Question 15 of 50

A program that translates all of the source code into machine code before it runs is

A. an interpreter B. an assembler C. a compiler D. a linker

Question 16 of 50

Binary search only works if the list is

A. sorted B. of even length C. stored in a linked list D. free of negative numbers

Question 17 of 50

Which sorting algorithm repeatedly compares neighbouring items and swaps them if they are in the wrong order?

A. merge sort B. bubble sort C. binary sort D. quick search

Question 18 of 50

A stack removes items in which order?

A. first in, first out B. random order C. last in, first out D. smallest item first

Question 19 of 50

Which data structure removes items in the same order they were added?

A. queue B. stack C. tree D. graph

Question 20 of 50

Which version of the Internet Protocol uses 128-bit addresses?

A. IPv4 B. IPv6 C. MAC D. DNS

Question 21 of 50

The main job of DNS is to

A. translate domain names into IP addresses B. encrypt emails C. assign MAC addresses D. block viruses

Question 22 of 50

Which protocol is used to send email from a client to a mail server?

A. FTP B. SMTP C. HTTP D. DHCP

Question 23 of 50

A field that uniquely identifies each record in a table is the

A. foreign key B. index C. primary key D. query

Question 24 of 50

Which is usually the first stage of the software development life cycle?

A. testing B. maintenance C. coding D. requirements analysis

Question 25 of 50

Machine learning is best described as

A. a computer learning patterns from data to make predictions B. training people to type faster C. building computer hardware D. a type of operating system

Question 26 of 50

In the von Neumann architecture, programs and data are

A. kept on separate machines B. stored together in the same main memory C. stored only on paper D. never stored

Question 27 of 50

Which bus carries the address of the memory location being read or written?

A. control bus B. data bus C. address bus D. power bus

Question 28 of 50

A processor with a clock speed of 3 GHz performs about

A. 3 million cycles per second B. 3 billion cycles per second C. 3 cycles per second D. 3,000 cycles per second

Question 29 of 50

Software stored permanently in ROM to start up the computer, such as the BIOS, is

A. freeware B. firmware C. malware D. shareware

Question 30 of 50

In a client–server network,

A. clients never send requests B. all computers are equal C. there is no network D. a central server provides services to client computers

Question 31 of 50

Ignoring unnecessary detail and focusing on what matters is

A. iteration B. decomposition C. abstraction D. debugging

Question 32 of 50

A table used to follow the values of variables step by step through an algorithm is a

A. hash table B. truth table C. flowchart D. trace table

Question 33 of 50

HTTPS differs from HTTP because it

A. is slower always B. encrypts the data sent between browser and server C. does not use the internet D. only sends images

Question 34 of 50

Which algorithm is generally fastest for sorting large lists?

A. bubble sort B. merge sort C. linear search D. insertion sort for huge lists

Question 35 of 50

Normalisation in databases aims to

A. reduce data redundancy B. increase duplication C. delete all data D. slow queries

Question 36 of 50

What does the following print? for i in range(3): print(i, end="")

A. 123 B. 012 C. 0 1 2 D. 3

Question 37 of 50

After pushing 3, 5, 7 onto an empty stack and popping once, the top item is

A. 5 B. 7 C. 3 D. empty

Question 38 of 50

In TCP/IP, the protocol that guarantees ordered, reliable delivery is

A. TCP B. UDP C. IP D. ARP

Question 39 of 50

The SQL query SELECT COUNT(*) FROM students WHERE age > 16 returns

A. the number of students older than 16 B. all students C. their ages D. nothing

Question 40 of 50

Apply De Morgan's law to NOT(A + B).

A. Ā · B̄ B. Ā + B̄ C. A · B D. A + B

Question 41 of 50

A recursive function must have

A. a global variable B. no parameters C. a loop D. a base case that stops the recursion

Question 42 of 50

The time complexity of binary search is

A. O(n²) B. O(n) C. O(log n) D. O(1)

Question 43 of 50

The worst-case time complexity of bubble sort is

A. O(log n) B. O(n log n) C. O(n) D. O(n²)

Question 44 of 50

The transport-layer port commonly used for HTTPS is

A. 443 B. 80 C. 21 D. 25

Question 45 of 50

A many-to-many relationship in a relational database is implemented using

A. a link (junction) table B. one table C. a primary key only D. a view

Question 46 of 50

Referential integrity ensures that

A. foreign key values match existing primary keys B. data is encrypted C. tables are sorted D. no nulls exist

Question 47 of 50

Simplify A + A·B.

A. A B. B C. A·B D. 1

Question 48 of 50

How many NAND gates are needed to make an AND gate?

A. 2 B. 1 C. 3 D. 4

Question 49 of 50

In a circular queue of size 5 with front at index 3 and rear at index 1, the number of items is

A. 4 B. 2 C. 3 D. 5

Question 50 of 50

Accessing an element of an array by index takes

A. constant time O(1) B. O(n) C. O(n²) D. O(log n)

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.