NECO Computer Studies OBJ
- B — group
- A — entering text
- D — system profiler
- D — Ken Thompson
- E — web browser
- B — debugging
- B — character reader
- E — file operation
- B — creates high rate of unemployment
- A — AND
- E — 9
- B — 0 and 1
- C — hexadecimal
- B — Indent
- E — F7
- D — flowchart
- B — August 6, 1991
- D — star
- D — portability
- B — draws vector graphics
- B — application package
- C — line number
- B — convert assembly language into machine language
- C — Java
- C — start
- E — REM
- B — Education
- C — Permission
- C — High traffic
- B — hotspot
- E — remove unwanted part of an image
- D — style
- D — primary
- C — query
- C — is the total perception of the designer who drew the flowchart
- A — coding
- A — analysis
- E — there is too much dependency on the central device
- B — phishing
- B — cyberbullying
- A — black/black-white
- B — authentication
- A — Affordability
- B — first
- C — EDVAC
- B — manages system security
- A — delete
- A — Ctrl + =
- C — Microsoft Excel
- D — 750
- B — 0110₂
- C — TRUE if all inputs are TRUE
- D — can implement any other basic logic gate
- B — 101010₂
- A — 1
- A — 100010001
- E — VI → I → V → IV → III → II
- C — Making a choice
- C — Eating or drinking while using the system
- D — has a space between the username
COMPLETED!!!
NECO Computer Studies Essay
Number 1
(1ai)
A domain name is a unique name or address used to identify a website on the internet.
OR
A domain name is the text address typed into a web browser to open a particular website.
(1aii)
(PICK ANY TWO)
(i) .com: It is used for commercial or business websites.
(ii) .edu: It is used for educational institutions.
(iii) .gov: It is used for government websites.
(iv) .org: It is used for organizations, especially non-profit organizations.
(v) .net: It is used for network-related websites.
(1bi)
Auxiliary storage is a secondary storage device used to store data permanently, while main storage is the primary memory used by the computer to hold data and programs currently being processed.
Examples of auxiliary storage are hard disk, flash drive and memory card, while examples of main storage are RAM and ROM.
(1bii)
Steps involved in adding page numbers in Microsoft Word:
(i) Open the Microsoft Word document.
(ii) Click on the Insert tab.
(iii) Click on Page Number.
(iv) Choose the position where the page number should appear, such as top of page or bottom of page.
(v) Select the preferred page number style.
(vi) Click Close Header and Footer or continue typing in the document.
Number 2
(2ai)
(2aii)
(PICK ANY TWO)
(i) Greater than: >
(ii) Less than: <
(iii) Equal to: =
(iv) Greater than or equal to: >=
(v) Less than or equal to: <=
(vi) Not equal to: <>
(2bi)
Functions of two flowchart symbols:
(i) Terminal symbol: It is used to show the beginning or end of a flowchart.
(ii) Process symbol: It is used to show an operation or calculation in a flowchart.
(iii) Input/Output symbol: It is used to show data input or output in a flowchart.
(iv) Decision symbol: It is used to show where a choice or condition is made.
(2bii)
An algorithm is a step-by-step procedure for solving a problem or performing a task.
OR
An algorithm is a finite set of instructions arranged in logical order to solve a particular problem.
Number 3
NUMBER 3
(3a)
(i) Router: It connects different networks together and directs data packets to their correct destination.
(ii) Modem: It converts digital signals from a computer to analogue signals for transmission and converts analogue signals back to digital signals.
(iii) Switch: It connects devices in a network and sends data only to the device it is meant for.
(3b)
Binary number system uses only two digits, 0 and 1, while octal number system uses eight digits, 0 to 7.
Binary number system has base 2, while octal number system has base 8.
(3c)
(DIAGRAM)
Explanation of one component:
Central Processing Unit: The CPU is the brain of the computer. It controls the activities of all other parts of the computer and processes data into useful information. It contains the control unit, arithmetic and logic unit, and registers.
Number 4
(4ai)
A compiler is a language translator that converts a high-level programming language into machine language at once before the program is executed.
(4aii)
Convert 742₈ to binary:
7 = 111
4 = 100
2 = 010
Therefore,
742₈ = 111100010₂
(4aiii)
(PICK ANY TWO)
(i) Use strong passwords.
(ii) Install and update antivirus software.
(iii) Use firewall protection.
(iv) Avoid opening suspicious links and attachments.
(v) Keep software and operating system updated.
(vi) Restrict unauthorized access to the computer.
(4b)
CPU registers are small temporary storage locations inside the CPU used to hold data during processing.
To carry out basic addition, the first number is loaded into a register. The second number is also loaded into another register. The control unit directs the arithmetic and logic unit to add the two numbers. After the addition, the result is stored in another register called the accumulator or result register.
For example, if 5 and 3 are to be added, 5 is stored in one register and 3 is stored in another register. The ALU adds them and stores the result, 8, in the accumulator.
Number 5
(5ai)
A communication system is a system that enables information or messages to be transmitted from one person, place or device to another through a communication channel.
(5aii)
(PICK ANY TWO)
(i) It makes communication faster and easier.
(ii) It improves access to information.
(iii) It promotes online learning and research.
(iv) It helps businesses to operate faster and more efficiently.
(v) It creates job opportunities in areas such as programming, networking and data processing.
(5aiii)
An icon in computing is a small picture or symbol on the computer screen that represents a program, file, folder or command.
(5bi)
(PICK ANY TWO)
(i) To increase speed of operation.
(ii) To reduce errors in business activities.
(iii) To store and retrieve records easily.
(iv) To improve efficiency and productivity.
(v) To reduce the cost of manual work.
(vi) To improve customer service.
(5bii)
CorelDraw is a graphics package used mainly for designing logos, posters, flyers and other graphic works, while Microsoft PowerPoint is a presentation package used for creating and displaying slides.
CorelDraw is used mainly for graphic design, while Microsoft PowerPoint is used mainly for slide presentation.
Number 6
(6ai)
(DIAGRAM)
Mesh network topology is a type of network topology in which each device or computer is connected directly to other devices in the network. This allows data to move through different paths from one device to another.
(6aii)
(i) It is expensive to install because it requires many cables and network devices.
(ii) It is difficult to set up and maintain because of the many connections between devices.
(6bi)
A form in database is an object used to enter, view, edit and display records in a database in a well-arranged format.
(6bii)
(PICK ANY TWO)
(i) Charles Babbage: Difference Engine/Analytical Engine.
(ii) Blaise Pascal: Pascaline.
(iii) Herman Hollerith: Tabulating machine.
(iv) Joseph Jacquard: Jacquard loom.
(v) John Napier: Napier’s bones.
(vi) Gottfried Leibniz: Leibniz calculator/Stepped Reckoner.
(6biii)
(PICK ANY TWO)
(i) Print Layout view.
(ii) Read Mode view.
(iii) Web Layout view.
(iv) Outline view.
(v) Draft view.
COMPLETED!!!