NECO 2026 COMPUTER HARDWARE & GSM REPAIR ANSWERS (OBJ & ESSAY)

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COMPUTER HARDWARE OBJ
01-10: CAEEDBADED
11-20: AEDEBAAAED
21-30: CCEEDAAEEB
31-40: CCEBCCADCA
41-50: ADDCCEAABA

COMPLETED
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INSTRUCTION: ANSWER FIVE(5) QUESTIONS ONLY

(1ai)
A medium is the channel or path through which information or signals are transmitted from a sender to a receiver.

(1aii)
(i) Copper cable
(ii) Optical fibre cable

(1b)
(i) NCC (Nigerian Communications Commission): Regulates and supervises the telecommunications industry in Nigeria.
(ii) NITEL (Nigerian Telecommunications Limited): Provides telecommunication services such as telephone and data communication.
(iii) NBC (National Broadcasting Commission): Regulates and licenses radio and television broadcasting stations in Nigeria.
(iv) NITDA (National Information Technology Development Agency): Promotes and develops Information Technology (IT) in Nigeria.
(v) NIPOST (Nigerian Postal Service): Provides postal and mail delivery services throughout Nigeria.

(1c)
The Base Transceiver Station (BTS) is the equipment in a GSM network that communicates directly with mobile phones within a cell. It houses the antenna and transceivers that transmit and receive radio signals to and from mobile stations, converting them for transmission to the Base Station Controller (BSC), which then links the cell to the rest of the network.

(1d)
(i) Weather satellite: Used for weather forecasting, climate monitoring, and storm tracking.
(ii) Communication satellite: Used for telephone, television, radio broadcasting, and Internet communication.
(iii) Navigation satellite: Used for positioning, navigation, mapping, and location services (GPS).

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(2ai)
(i) Current: This is the flow of electric charge through a conductor, measured in amperes (A).
(ii) Voltage: This is the electrical potential difference between two points that causes current to flow, measured in volts (V).
(iii) Resistance: This is the opposition offered to the flow of electric current in a conductor, measured in ohms (Ω).

(2aii)
Yellow (4), Violet (7), Orange (×1,000), Gold (±5% tolerance)
Value = 47,000Ω (47 kΩ) ± 5%

(2bi)
(i) Resistor
(ii) Capacitor
(iii) Diode
(iv) Transistor

(2bii)
(i) Resistor: used to limit or control the flow of electric current.
(ii) Capacitor: used to store electrical charge or smooth power supply output.
(iii) Diode: used to allow current to flow in only one direction (rectification).
(iv) Transistor: used as an electronic switch or amplifier.

(2ci)
An amplifier is an electronic device or circuit that increases the amplitude (strength) of an electrical signal, such as voltage, current, or power, without significantly changing the original signal.

(2cii)
(i) Public address (PA) systems; Used to increase the strength of audio signals for loudspeakers.
(ii) Radio and television communication; Used to amplify transmitted and received signals for clear communication.
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(3a)
A computer is an electronic device that accepts data as input, processes it according to a set of instructions, stores it, and produces meaningful information as output.

(3b)
(i) Software is a collection of programs and instructions that direct a computer on how to perform specific tasks. It enables the computer hardware to function and carry out various operations.
(ii) System software; Application software.

(3c)
(i) Monitor
(ii) System unit
(iii) Keyboard
(iv) Mouse
(v) Printer
(vi) Scanner
(vii) Speakers
(viii) Hard disk drive (HDD) or Solid State Drive (SSD)
(ix) Microphone
(x) Webcam

(3d)
(i) Sending and receiving e-mails.
(ii) Online learning and research.
(iii) Social networking and communication.
(iv) Online banking and electronic commerce (e-commerce).
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(4a)
(i) A national telecommunication carrier is a telecommunications company that provides communication services such as voice calls, text messaging, and internet services within a particular country.
(ii) An international telecommunication carrier is a telecommunications company that provides communication services between different countries, enabling international voice, data, and internet connectivity.

(4b)
[TABULATE]

UNDER NATIONAL CARRIER
(i) Operates within one country.
(ii) Provides domestic communication services.
(iii) Licensed mainly by national regulatory authorities.

UNDER INTERNATIONAL CARRIER
(i) Operates across different countries.
(ii) Provides international communication services.
(iii) Operates through international agreements and global networks.

(4c)
=National Telecommunication Carriers=
(i) MTN Nigeria
(ii) Airtel Nigeria
(iii) Globacom (Glo)
(iv) 9mobile
(v) Smile Communications

=International Telecommunication Carriers=
(i) AT&T
(ii) Vodafone
(iii) Orange
(iv) China Mobile
(v) Verizon
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(5ai)
A user interface is the means through which a user interacts and communicates with a computer, mobile phone, or other electronic device to perform tasks and receive information.
(ii) Graphical User Interface (GUI); Command Line Interface (CLI); Menu-driven Interface.

(5b)
(i) Mobile phone accessories are additional devices or equipment used with a mobile phone to improve its operation, protection, convenience, or functionality.
(ii) Charger: used to recharge the phone battery.
Earphones/Headset: used for listening to audio and making hands-free calls.

(5c)
(i) Display settings.
(ii) Sound settings.
(iii) Security settings.
(iv) Network settings.
(v) Date and time settings.

(5d)
=Hardware=
(i) Battery
(ii) Screen

=Software=
(i) Android Operating System
(ii) Phone Dialer Application
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(6a)
(i) A multimeter is an electronic measuring instrument used to measure electrical quantities such as voltage, current, and resistance.
(ii) Check that the multimeter is in good working condition. Select the correct measurement function and range. Insert the test leads correctly into the appropriate terminals.

(6b)

An Allen key is an L-shaped metal tool with a hexagonal cross-section used for tightening and loosening hexagonal socket screws and bolts commonly found in electronic devices and machinery.

(6c)
(i) Pouch: protects tools and devices from damage and allows easy carrying.
(ii) Screen Guard: protects the phone screen from scratches and cracks.
(iii) Gloves: protect the hands from injuries and electric shock.
(iv) Goggle: protects the eyes from dust and flying particles.
(v) Helmet: protects the head from accidental injuries.

(6d)
(i) Dirty battery contact: prevents proper power supply and may stop the phone from switching on.
(ii) Charger not well plugged: causes slow charging or failure to charge the battery.
(iii) SIM card incorrectly inserted: prevents the phone from detecting the network.
(iv) One key on the keypad stuck: causes difficulty in typing or unintended commands.
(v) Using a dead battery: prevents the phone from powering on.
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(7a)
(i) Dealership is the business arrangement in which an individual or company is authorized by a manufacturer or supplier to buy, sell, distribute, or service particular products within a specified area for profit.
(ii) Sales of mobile phones and accessories. GSM recharge cards, SIM card registration, and activation services.

(7b)
A network service provider supplies communication services such as voice calls, SMS, and internet connectivity to subscribers, while a service centre repairs, maintains, and services mobile phones and other communication devices.

(7c)
(i) Workbench
(ii) Soldering station
(iii) Digital multimeter
(iv) Screwdriver set
(v) Computer with internet connection

(7d)
(i) Keep the workshop clean and well arranged.
(ii) Switch off electrical equipment before repairing them.
(iii) Wear appropriate protective equipment while working.
(iv) Handle tools and equipment carefully.
(v) Keep flammable materials away from heat and electrical sources.
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