2020/2021 WAEC/NECO Answers: 2020 Neco computer answer



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This is actually the 2019 Neco computer answer Answers as questions sent to our subscribers on WHATSAPP, if you are looking for 2020 WAEC/NECO Answers midnight before the exam, try contacting us.



(1a)
(Please Tabulate)
-Web address is the URL of your web page
while
Email is used to send electronic messages to each other using computer networks.

-Email you can always receives electronic mails while
web address is not used to receive any mails sent to you.

-The email address is oftenly used in lower case
while
websites or web address are written in mixed letters.

-Example of Web address
www.google.com
While
Example of Email address
christian999@gmail.com

(1aii)
POP=Post office protocol
SMTP=Simple Mail Transfer protocol

(1aiii)
(Choose any four)
(i)www.gmail.com
(ii)www.yahoo.com
(iii)www.outlook.com
(iv)www.icloud.com
(iv)www.zoho.com

=================================================


====================================

(2ai)
master file: Master file is a computer file that is used in collection of records pertaining to one of the main subjects of an information system, such as customers, employees, products and vendors. Master files contain descriptive data, such as name and address, as well as summary information, such as amount due and year-to-date sales.

(2aii)
Transaction file : transaction file is a computer file used to hold data during transaction processing. The file is later used to update the master file and audit daily, weekly or monthly transactions. For example in a busy supermarket, daily sales are recorded on a transaction file and later used to update the stock file. The file is also used by the management to check on the daily or periodic transactions.

(2bi)
(i)STP (Shielded twisted pair) is a twisted pair cable enclosed in foil or mesh shield.
While
UTP (Unshielded twisted pair) is a cable with wires that are twisted together.

(ii)In Shielded twisted pair Installation of cables is difficult comparatively.
While
In Unshielded twisted pair, Easily installed as cables are smaller, lighter, and flexible.

(2bii)
Octal is (arithmetic/computing/uncountable) the number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7
While
Binary is (mathematics/computing/uncountable) the bijective base-2 numeral system, which uses only the digits. example 110100

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(3ai)
computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as mechanical levers or electronic

(3aii)
(i)Function Keys
Example; F1 is used in many Windows programs to open the "help" menu
(ii)Alphanumeric Keys
Example; number sign."
(iii)Punctuation Keys
Example; "comma key,"
(iv)Navigation Keys
Example; one pointing up, one pointing down, one pointing right and one pointing left.

(3bi)
Broadcast in communication system is a track within mass communication that pertains to video and audio content for use on a variety of platforms.

(3bii)
(i)Internet broadcasting ; this is a means of advertising on the internet has become increasingly popular as you can advertise to your target audience. Space can be bought on websites that the target customers would use and data can be collected about how many people clicked on the ad.
(ii)TV broadcasting; this means of broadcast on television provides us with the highest volume of electronic media advertising. There are hundreds of advertisements shown on each channel per day and some slots are sold for millions to the advertisers as they will have such a high audience to watch their ad.
====================================

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(5ai)
(a) Real-time operating system(RTOS): This is any operating system intended to serve real-time applications that process data as it comes in, typically without buffer delays. Processing time requirements are measured in tenths of seconds or shorter increments of time.

(b) Basic input-output system(BIOS ):Is non-volatile firmware used to perform hardware initialization during the booting process, and to provide runtime services for operating systems and programs. The BIOS firmware comes pre-installed on a personal computer's system board, and it is the first software to run when powered on.

(c) Expansion card: Expansion card is an electronic card/board that is used to add extra functionality to a computer. It is inserted into an expansion slot on the motherboard of a computer. Expansion cards contain edge connectors that are used to create an electronic link between motherboard and card, thus enabling these two to communicate.

(d) Power-on self-test(POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. The results of the POST may be displayed on a panel that is part of the device, output to an external device, or stored for future retrieval by a diagnostic tool.

(5bi)
(i) Trojan Horses
(ii) Keyloggers

(5bii)
An Internet service provider, ISP is a company that provides individuals and other companies access to the Internet and other related services such as Web site building and virtual hosting.



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