2026 NECO COMPUTER STUDY ANSWER


COMPUTER STUDIES
1-10: BADDEBEEBA
11-20: EBCBEDBDDB
21-30: BCBCCEBCCB
31-40: EDDCCAAEBB
41-50: ABBBEBAACD
51-60: BCDBAAECCD



(1ai)
(PICK ANY ONE)
A domain name is the unique and easy-to-remember name given to a website on the Internet. It is used instead of the website's numerical IP address to help users locate and access websites easily.

OR

A domain name is the official address or name of a website on the Internet that identifies it and allows users to access it easily without using its IP address.

(1aii)
(PICK ANY TWO)
(i) .com – This is used for commercial or business websites.

(ii) .org – This is used by non-profit organizations, charities, and associations.

(iii) .edu – This is used by educational institutions such as universities and colleges.

(iv) .gov – This is used by government agencies and departments.

(v) .net – This is originally used for network service providers, but now used by various organizations.

(1bi)
(PICK ANY ONE)
Auxiliary storage is a secondary storage device used for the permanent storage of data and programs even when the computer is switched off. Main storage is the computer's primary memory that temporarily stores data and instructions currently being processed and loses its contents when power is turned off.

OR

Auxiliary storage refers to non-volatile memory used to store data and programs for long-term use, such as hard drives and flash drives. Main storage refers to the computer's primary memory (RAM), which temporarily holds data and instructions during processing and is volatile in nature.

(1bii)
(i) Open the Microsoft Word document.
(ii) Click on the Insert tab on the Ribbon.
(iii) Click Page Number in the Header & Footer group.
(iv) Choose where you want the page number to appear (Top of Page, Bottom of Page, Page Margins, or Current Position).
(v) Select your preferred page number style from the list.
(vi) Click Close Header and Footer or press the Esc key to return to the document.

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(2ai)


(2aii)
(PICK ANY TWO)
(i) Equal to (=)
(ii) Not equal to (<>)
(iii) Less than (<)
(iv) Greater than (>)

(2bi)


(2bii)
(PICK ANY ONE)
An algorithm is a step-by-step sequence of logical instructions or procedures used to solve a problem or perform a specific task. It serves as a guide for developing a computer program.

OR

An algorithm is a finite set of well-defined and orderly steps followed to solve a particular problem or achieve a desired result. It provides a systematic method for carrying out a task before writing a program.

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(3a)
(i) Router:
(PICK ANY ONE)
- It connects two or more different networks.
- It directs or routes data packets to their correct destination.
- It enables devices on a local network to access the Internet.

(ii) Modem:
(PICK ANY ONE)
- It converts digital signals to analogue signals and analogue signals back to digital (modulation and demodulation).
- It connects a computer or network to an Internet Service Provider (ISP).
- It facilitates the transmission of data over telephone or cable lines.

(iii) Switch:
(PICK ANY ONE)
- It connects multiple devices within the same Local Area Network (LAN).
- It transfers data only to the intended receiving device, reducing network traffic.
- It improves communication efficiency and network performance.

(3b)
(PICK ANY ONE)
The binary number system is a base-2 numbering system that uses only two digits, 0 and 1, to represent numbers and is mainly used by computers. The octal number system is a base-8 numbering system that uses eight digits (0–7) to represent numbers and provides a shorter form of binary numbers.

OR

Binary is a number system with a base of 2, using only the digits 0 and 1 for calculations and data processing in computers. Octal is a number system with a base of 8, using the digits 0 to 7, and is commonly used to simplify long binary numbers.

(3c)


(PICK ANY ONE)
(i) Control Unit (CU): The Control Unit (CU) is the part of the Central Processing Unit (CPU) that controls and coordinates all the operations of the computer. It fetches instructions from the computer's memory, interprets them, and directs other components on how to carry out the instructions. It also ensures that data flows properly between the CPU, memory, and input/output devices, making all computer operations run in the correct sequence.

(ii) Arithmetic and Logic Unit (ALU): The Arithmetic and Logic Unit (ALU) is the part of the CPU responsible for performing all arithmetic and logical operations. It carries out mathematical calculations such as addition, subtraction, multiplication, and division, and also performs logical comparisons like greater than, less than, and equal to. The ALU processes data and sends the results to memory or the output unit for further use.

(iii) Main Memory (Primary Storage): Main memory is the internal memory of the computer that stores data, instructions and programs currently being used by the CPU. It provides fast access to information needed for processing. It consists of Random Access Memory (RAM), which stores data temporarily and loses its contents when power is switched off, and Read Only Memory (ROM), which stores permanent instructions required to start the computer. Main memory plays an important role in improving the speed and efficiency of computer operations.

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(4ai)
(PICK ANY ONE)
A compiler is a computer program that translates an entire program written in a high-level programming language into machine language before it is executed.

OR

A compiler is a system software that converts a program written in a high-level programming language into machine code as a single unit before the program is run.


(4aii)



(4aiii)
(PICK ANY TWO)
(i) Use strong and unique passwords.
(ii) Install and regularly update antivirus software.
(iii) Keep the operating system and software up to date.
(iv) Enable and use a firewall.
(v) Avoid opening suspicious emails or attachments.
(vi) Back up important data regularly.
(vii) Install software only from trusted sources.

(4b)
(PICK ANY ONE)
To carry out a basic addition using CPU registers, the first number is loaded into the accumulator (ACC) or a general-purpose register, while the second number is loaded into another register. The Control Unit (CU) instructs the Arithmetic and Logic Unit (ALU) to perform the addition. The ALU adds the two values together, and the result is stored in the accumulator or another register. The final result can then be transferred to the computer's main memory or sent to an output device for display.

OR

During a basic addition operation, CPU registers temporarily store the numbers involved in the calculation. The first value is placed in one register, while the second value is stored in another register. The Control Unit (CU) directs the Arithmetic and Logic Unit (ALU) to add the two values. After the addition is completed, the result is stored in a register, usually the accumulator, before it is transferred to the main memory or displayed as output.

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(5ai)
(PICK ANY ONE)
A communication system is a system that enables the transmission and exchange of information or data from one person or device to another through a communication medium.

OR

A communication system is a set of devices and communication channels used to send, receive and process information between two or more points.

(5aii)
(PICK ANY TWO)
(i) It enables fast and easy communication.
(ii) It improves access to information.
(iii) It enhances teaching and learning.
(iv) It increases productivity and efficiency.
(v) It creates employment opportunities.
(vi) It saves time and reduces operational costs.

(5aiii)
(PICK ANY ONE)
An icon is a small graphical symbol or picture on a computer screen that represents a program, file, folder or command.

OR

An icon is a graphical representation used to identify and provide quick access to applications, files, folders or system functions on a computer.

(5bi)
(PICK ANY TWO)
(i) To increase the speed of processing information.
(ii) To improve accuracy and reduce errors.
(iii) To store large amounts of data efficiently.
(iv) To improve productivity and efficiency.
(v) To reduce operating costs.
(vi) To improve record keeping and data retrieval.

(5bii)
(PICK ANY ONE)
CorelDraw is a graphics design software used for creating and editing drawings, logos, posters, and other graphic designs. Microsoft PowerPoint is a presentation software used for creating and displaying slide shows for teaching, meetings, seminars, and presentations.

OR

CorelDraw is a software that is mainly used for designing and editing graphic images using vector graphics. Microsoft PowerPoint is mainly used for preparing and presenting information in the form of slides containing text, pictures, charts, and animations.

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(6ai)


(6aii)
(PICK ANY TWO)
(i) It is very expensive to install because a large number of cables and network devices are required.
(ii) Installation is complex and time-consuming due to the many connections between devices.
(iii) Maintenance and troubleshooting are difficult because every node has multiple links.
(iv) It requires many network ports and hardware, which increases the overall cost.
(v) Adding or removing a device can be complicated because several connections may need to be changed.
(vi) It occupies more space because a large amount of cabling is needed.

(6bi)
(PICK ANY ONE)
A form is a database object used for entering, editing, viewing and managing records in a user-friendly manner.

OR

A form is an interface used to enter, modify and display data stored in a database, in a user friendly way.

(6bii)
(i) Blaise Pascal — Pascaline (Mechanical Adding Machine)

(ii) Charles Babbage — Analytical Engine

(6biii)
(PICK ANY TWO)
(i) Print Layout View
(ii) Web Layout View
(iii) Draft View
(iv) Read Mode View
(v) Outline View