Computer Studies past questions: JAMB UTME 2023

79 objective questions, with answers. Free to read and practise.

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79 questions, one at a time, marked as you go or at the end. No account needed.

1.
___ is the type of computer that is designed to operate on two states, 0 and 1.
1. A.Analog computer
2. B.Hybrid computer
3. C.Digital computer
4. D.micro computer
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Answer: C Digital computer
2.
A computer code that spreads without the user interaction and can cause network performance problem is
1. A.a trojan
2. B.a computer worm
3. C.a spyware
4. D.a computer virus
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Answer: B a computer worm
3.
A device that sends and receives printed pages or images over telephone lines by digitizing the material with an internal optical scanner and transmitting the information as electronic signals is a
1. A.ATM
2. B.scanner
3. C.GSM
4. D.fax machine
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Answer: D fax machine
4.
A set of moral principles that regulate the use of computers is called
1. A.cyber security guidelines
2. B.computer ethics
3. C.computer safety laws
4. D.computer rules
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Answer: B computer ethics
5.
A set of programs that direct computers to perform specific information processing activities for end users is
1. A.System software
2. B.Operating System
3. C.Application software
4. D.Translators
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Answer: C Application software
6.
A type of application software that combines the abilities of several general purpose applications in one program is ?
1. A.Graphics Packages
2. B.Integrated Packages
3. C.Multipurpose application
4. D.Database management packages
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Answer: B Integrated Packages
7.
An action performed in the GUI operating systems to hide a window but keep the program running in the background is ?
1. A.hide
2. B.multitasking
3. C.minimize
4. D.maximize
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Answer: C minimize
8.
Analog, digital and hybrid computers are classification of computers based on
1. A.the type of data-handling techniques
2. B.the purpose
3. C.the size
4. D.the functionality
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Answer: A the type of data-handling techniques
9.
Anti-virus software is an example of ?
1. A.Utility programs
2. B.Operating systems
3. C.Application software
4. D.Translators
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Answer: A Utility programs
10.
At what stage in system development life cycle are all data documented in the form of detailed data flow diagrams(DFDs)
1. A.System design
2. B.Feasibility study
3. C.System analysis
4. D.Investigative study
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Answer: C System analysis
11.
Computers manipulate data in many ways, and this manipulation is called ?
1. A.batching
2. B.utilizing
3. C.processing
4. D.upgrading
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Answer: C processing
12.
Computers that are small and low cost are referred to as ?
1. A.mini computers
2. B.small computers
3. C.tablet computers
4. D.micro computers
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Answer: D micro computers
13.
EDVAC was produced using which of these concepts ?
1. A.packet routing
2. B.stored program
3. C.circuit switching
4. D.packet switching
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Answer: B stored program
14.
Evaluate $1011 2 + 122 4 1011_2 + 122_4$ , leaving your answer in base 10.
1. A.37
2. B.51
3. C.47
4. D.73
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Answer: A 37
15.
How many bits are in one nibble ?
1. A.2
2. B.4
3. C.8
4. D.16
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Answer: B 4
16.
If the control unit controls other units of the CPU, which unit stores instructions,data and intermediate results.
1. A.Memory unit
2. B.Arithmetic section
3. C.Control unit
4. D.Logic section
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Answer: A Memory unit
17.
In BASIC, REM shows a statement to be
1. A.executable statement
2. B.un-executable statement
3. C.comment
4. D.output
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Answer: C comment
18.
In computer architecture, the type of bus that connects the major components of a computer system is
1. A.address
2. B.data bus
3. C.control bus
4. D.system bus
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Answer: D system bus
19.
In technical feasibility, the priority is ?
1. A.whether the probolem can be solved in the user's environment
2. B.if the likely benefits outweight the cost of solving the problem
3. C.whether the problem can be solved using existing technology and resources available
4. D.whether the problem can be solved without causing any social issues
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Answer: C whether the problem can be solved using existing technology and resources available
20.
Large computers are classified as
1. A.desktops
2. B.micro computers
3. C.mini computers
4. D.mainframe computers
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Answer: D mainframe computers
21.
One of the following is not a good way to prevent virus.
1. A.encryption
2. B.use of firewall
3. C.carelessly exposing your vital and personal information
4. D.use of antivirus software
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Answer: C carelessly exposing your vital and personal information
22.
The closest computer language to human is ?
1. A.High level language
2. B.Low level language
3. C.Machine language
4. D.Assembly language
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Answer: A High level language
23.
The computer that combines the functions of both analog and digital computers is called ?
1. A.Digital computer
2. B.Analog computer
3. C.Hybrid computer
4. D.multipurpose computer
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Answer: C Hybrid computer
24.
The connection between two or more computers to share resources or allow electronic communication is called ?
1. A.Connection
2. B.Communication
3. C.Transfer
4. D.Network
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Answer: D Network
25.
The default file extension for PowerPoint version 2007 and newer is ?
1. A..ppxt
2. B..pps
3. C..ppt
4. D..pptx
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Answer: D .pptx
26.
The diagrammatic representation of an algorithm is
1. A.pseudocodes
2. B.codes
3. C.graphics
4. D.flowchart
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Answer: D flowchart
27.
The first computer made available for commercial use was
1. A.UNIVAC
2. B.EDSAC
3. C.Mark-1
4. D.ENIAC
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Answer: A UNIVAC
28.
The first stage of data processing activities is ?
1. A.Manipulation
2. B.Collection
3. C.Conversion
4. D.Sorting
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Answer: B Collection
29.
The first step in a CPU instruction cycle is
1. A.Decode
2. B.Get
3. C.Fetch
4. D.Execute
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Answer: C Fetch
30.
The following are input devices except.
1. A.mouse
2. B.monitor
3. C.Keyboard
4. D.joystick
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Answer: B monitor
31.
The following are the methods of file security except
1. A.hacking
2. B.use of password
3. C.Use of back up
4. D.Use of Anti-virus
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Answer: A hacking
32.
The last cycle of data processing where data and information are preserved for future is called
1. A.processing
2. B.recording
3. C.storage
4. D.output
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Answer: C storage
33.
The logic gate in the figure above is
1. A.XNOR gate
2. B.NOT gate
3. C.XOR gate
4. D.OR gate
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Answer: C XOR gate
34.
The only possible number base for $235 x _x$ among the following is ?
1. A.3
2. B.5
3. C.4
4. D.6
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Answer: D 6
35.
The Output will be a HIGH for any case when one or more inputs are one for a(an)
1. A.OR gate
2. B.AND gate
3. C.NOR gate
4. D.NOT gate
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Answer: A OR gate
36.
The process of finding and correcting errors in the program code is called ?
1. A.testing
2. B.Debugging
3. C.Editing
4. D.coding
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Answer: B Debugging
37.
The process where a programmer converts a program specifications into computer instructions is called ?
1. A.Debugging
2. B.Coding
3. C.Testing
4. D.System design
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Answer: B Coding
38.
The term used to describe when new information replaces old information or data is
1. A.file loss
2. B.delete
3. C.re-write
4. D.overwrite
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Answer: D overwrite
39.
The two types of operating system are
1. A.command line and graphical user interface
2. B.translators and assemblers
3. C.system software and application software
4. D.UNIX and LINUX
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Answer: A command line and graphical user interface
40.
The type of computers that are designed to perform complex calculations extremely rapidly are called ?
1. A.supercomputer
2. B.micro computers
3. C.laptops
4. D.mainframe computer
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Answer: A supercomputer
41.
The type of database in which the data are connected in different files by using common data elements or a key field is ?
1. A.Relational database
2. B.Network database
3. C.Hierarchical database
4. D.Object-oriented database
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Answer: A Relational database
42.
Translating the problem statement into a series of sequential steps describing what the program must do is known as
1. A.coding
2. B.creating the algorithm
3. C.debugging
4. D.writing documentation
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Answer: B creating the algorithm
43.
Translators are type of ?
1. A.System software
2. B.Operating system
3. C.Utility programs
4. D.Application software
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Answer: A System software
44.
What category of application package does microsoft excel belong to ?
1. A.Word processing package
2. B.Graphics packages
3. C.Database management packages
4. D.Spreadsheet packages
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Answer: D Spreadsheet packages
45.
What does R stands for in the CRUD acronym ?
1. A.Retrieve
2. B.Redirect
3. C.Read
4. D.Relate
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Answer: C Read
46.
What generation of computer is characterized by the use of vacuum tubes for circuitry and magnetic drums for main memory?
1. A.second generation
2. B.fourth generation
3. C.first generation
4. D.third generation
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Answer: C first generation
47.
What is the difference between an assembler and a compiler ?
1. A.an assembler converts a machine language code into assembly level language code while a compiler converts high level programming language to a machine language code
2. B.an assembler converts assembly level language code into machine language code while a compiler converts high level programming language code to a machine language code
3. C.a compiler converts assembly level language code into machine lange while an assembler converts high level programming language to a machine language code
4. D.they both convert assembly level language code into machine lange
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Answer: B an assembler converts assembly level language code into machine language code while a compiler converts high level programming language code to a machine language code
48.
What is the difference between internal and external modem
1. A.external modems are PCI or ISA expansion cards while internal modems are traditionally plug into a serial port on the computer
2. B.internal modems are PCI or ISA expansion cards while external modems are traditionally plug into a serial port on the computer
3. C.external modems are PCI or ISA expansion cards while internal modems are USB modems
4. D.they are PCI or ISA expansion cards
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Answer: B internal modems are PCI or ISA expansion cards while external modems are traditionally plug into a serial port on the computer
49.
what is the first computing machine invented ?
1. A.slide rule
2. B.Pascal calculator
3. C.Napier bones
4. D.Abacus
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Answer: D Abacus
50.
What is the function of the escape key ?
1. A.to shutdown the computer
2. B.to start an application
3. C.to interrupt or cancel the current process or running program
4. D.to delete a file/folder
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Answer: C to interrupt or cancel the current process or running program
51.
What is the shortcut for creating a new document ?
1. A.Ctrl + N
2. B.Ctrl + O
3. C.Ctrl + Q
4. D.Ctrl + M
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Answer: A Ctrl + N
52.
What is the shortcut for performing warm booting ?
1. A.y pressing the Ctrl + Alt keys simultaneously
2. B.y pressing the Ctrl + Alt + F1 keys simultaneously
3. C.y pressing the Ctrl + Del keys simultaneously
4. D.by pressing the Ctrl + Alt + Del keys simultaneously
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Answer: D by pressing the Ctrl + Alt + Del keys simultaneously
53.
What part of the central processing unit coordinates other units and manages the computer resources ?
1. A.coordinating unit
2. B.Memory unit
3. C.Arithmetic Logic unit
4. D.Control unit
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Answer: D Control unit
54.
What protocol is used between Email servers?
1. A.SMTP
2. B.SNMP
3. C.FTP
4. D.POP
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Answer: A SMTP
55.
What type of booting does the computer go through when starting up from a powered down ?
1. A.Cold booting
2. B.Soft booting
3. C.Warm booting
4. D.Rebooting
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Answer: A Cold booting
56.
When records are given a new value, it is called
1. A.updation
2. B.insertion
3. C.deletion
4. D.retrieval
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Answer: A updation
57.
When the computer reboots itself without triggering the hardware based reset, it is called ?
1. A.cold booting
2. B.hard reboot
3. C.cold reboot
4. D.soft reboot
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Answer: D soft reboot
58.
which communication channel allows the sending of information in one direction only?
1. A.simplex mode
2. B.half duplex mode
3. C.duplex mode
4. D.full duplex mode
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Answer: A simplex mode
59.
Which of the following allows devices on one network to communicate with devices on another network ?
1. A.T-switch
2. B.gateway
3. C.modem
4. D.multiplexer
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Answer: B gateway
60.
Which of the following can be used to select the entire document ?
1. A.Ctrl + K
2. B.Ctrl + A
3. C.Shift + A
4. D.Alt + F5
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Answer: B Ctrl + A
61.
Which of the following components of the computer is referred to as the administrative section ?
1. A.CPU
2. B.Output unit
3. C.Input unit
4. D.Memory Unit
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Answer: A CPU
62.
Which of the following controls the way in which the computer system functions and provides a means by which users can interact with the computer.
1. A.CPU
2. B.application software
3. C.operating system
4. D.ALU
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Answer: C operating system
63.
Which of the following does not replicate itself in an infected computer?
1. A.spyware
2. B.worm
3. C.trojan horse
4. D.virus
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Answer: C trojan horse
64.
Which of the following is a valid variable name in Python?
1. A.my_variable$
2. B.m$y_v$ariable
3. C.my-variable
4. D.1m$y_v$ariable
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Answer: B m$y_v$ariable
65.
Which of the following is an example of graphics software ?
1. A.Microsoft word
2. B.Adobe Illustrator
3. C.Microsoft powerpoint
4. D.MS Access
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Answer: B Adobe Illustrator
66.
Which of the following is NOT a high-level programming language?
1. A.Assembly language
2. B.C++
3. C.Python
4. D.Java
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Answer: A Assembly language
67.
Which of the following is not a third generation language?
1. A.FORTRAN
2. B.COBOL
3. C.Assembly language
4. D.Basic
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Answer: C Assembly language
68.
Which of the following is not an application software
1. A.MS - Word
2. B.Corel Draw
3. C.Linux
4. D.MacWrite
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Answer: C Linux
69.
Which of the following is not an example of graphics packages
1. A.Freelance
2. B.Quattro pro
3. C.Corel draw
4. D.Havard graphics
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Answer: B Quattro pro
70.
Which of the following is the standard keyboard layout ?
1. A.Dvorak
2. B.QWERTY
3. C.AZERTY
4. D.ABCD
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Answer: B QWERTY
71.
Which of the following is used for modulation and demodulation ?
1. A.Gateway
2. B.Protocol
3. C.Modem
4. D.Multiplex
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Answer: C Modem
72.
Which of the following monitors has only two colours
1. A.colour monitor
2. B.colour graphic adapter (CGA)
3. C.dichrome monitor
4. D.monochrome monitor
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Answer: D monochrome monitor
73.
Which of these application packages can be used to create a spreadsheet ?
1. A.Microsoft powerpoint
2. B.Microsoft excel
3. C.Macwrite
4. D.Microsoft word
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Answer: B Microsoft excel
74.
Which of these commands will reboot the computer ?
1. A.Ctrl + Alt + Del
2. B.Ctrl + Del
3. C.Ctrl + Alt + C
4. D.Ctrl + Alt
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Answer: A Ctrl + Alt + Del
75.
Which of these criteria is not important while classifying files ?
1. A.Organization method
2. B.Nature of content in the file
3. C.Size of the file
4. D.Storage medium
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Answer: D Storage medium
76.
Which of these is not true about peer-to-peer network ?
1. A.there is no dedicated servers
2. B.it has a strong security system
3. C.all computers in this network are known as peers
4. D.there is no hierarchy among the computers
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Answer: B it has a strong security system
77.
Which of these programming languages is the most suitable for a business data processing?
1. A.BASIC
2. B.ALGOL
3. C.COBOL
4. D.FORTRAN
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Answer: C COBOL
78.
Which of these storage devices can act as a buffer between the CPU and the main memory ?
1. A.Hard disk
2. B.Floppy disk
3. C.Cache Memory
4. D.Flash drive
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Answer: C Cache Memory
79.
Who invented the Napier Bones
1. A.John Napier
2. B.Samuel Napier
3. C.Joseph Jacquard
4. D.Charles Babbage
Show answerHide answer
Answer: A John Napier

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