WAEC 2021 Data Processing Obj And Essay Answer – Aug/Sept Expo

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WAEC Data Processing Obj Answers

DATA PROCESSING:

1-10: DCDABCAAAD

11-20: CACACBBCBD

21-30: BDDDDBCAAD

31-40: ABBAABBADD

WAEC Data Processing Questions 2021

Theory Answers (Expo)

2021 Answers completed

2021 DATA PROCESSING ESSAY

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(6ai)

(i)Fingerprint. …

(ii)Facial Recognition. …

(6aii)

(i)Modems.

(ii)Multiplexers.

(6aiii)

(i)RCA (Stereo audio output)

(6aiv)

(i)Finger print

(ii)Signature

(6bi)

Difference is that to access that on internet an Internet

Service Provider (ISP) and a router to connect to the ISP

while it is not needed for that of storage

(6bii)

Biometric recognition creates a specific link between an

individual and a data record.

(1a)

(i)Disk formatting is the configuring process of a data

storage media such as a hard disk drive, floppy disk or

flash drive for initial usage.

(ii) Data backup is a copy of computer data taken and

stored elsewhere so that it may be used to restore the

original after a data loss event.

(iii) Virus scans: this is the process where antivirus search

through your system to locate and remove any malicious

threats on your device.

(1b)

(i) it is used for intra bank transfer

(ii) it is used for inter bank transfers

(iii) it is used to check account balance

(iv) it is used for printing of mini statement of account

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(3ai)

(i) On the Basis of Size and Capacity, [Supercomputer,

Mainframe, Mini, and Micro Computer].

(ii) On the Basis of Purposes, [General and Special

Purpose].

(iii) On the Basis of Hardware Design and Type [Analog,

Digital, and Hybrid Computer].

(3bii)

-ANALOG COMPUTER-

(i) Analog computers works with continuous values or

these types of systems process continuous data.

(ii) Analog computer has very low or limited memory and

it can store less amount of data.

-DIGITAL COMPUTER-

(i) Digital computers works with discrete values or these

types of systems process discrete data.

(ii) Digital computer has very big memory it can store

large amount of data.

(3b)

(I) Access to information: Increase in access to

information and services that has accompanied the

growth of the Internet. Some of the positive aspects of

this increased access are better, and often cheaper,

communications, such as VoIP phone and Instant

Messaging.

(ii) New tools, new opportunities: ICT gives access to new

tools that did not previously exist: digital cameras, photo-

editing software and high quality printers, screen

magnification or screen reading software enables partially

sighted or blind people to work with ordinary text rather

than Braille.

(iii) Communication: Cost savings by using e.g. VoIP

instead of normal telephone, email / messaging instead of

post, video conferencing instead of traveling to meetings,

e-commerce web sites instead of sales catalogues.

Access to larger, even worldwide, markets.

(3c)

(i) Guided Media

(ii) Shielded Twisted Pair (STP).

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2aii)

-Analog computer system is the very old computer system

which operates on the mathematical variables in the form

of continuously changeable physical quantities/entities

like mechanical, electrical, hydraulic, etc. They use

continuous values rather than discrete values so they work

on analog signal. At the time of at the time of the 1950s–

1960s these analog computers were first used. Analog

computers are limited in accepting the problems and also

they can never be extremely accurate.

-Digital computers are the computer systems/machines

which uses the binary number system, which has two

digits: 0 and 1 and performs many computational tasks. It

processes the data represented in discrete and the main

three components of digital computers are input,

processing and output. The first digital computer was

designed for numerical computations in the late 1940s.

Digital computers give results with more accuracy as it is

not dependent upon physical quantities for processing a

task.

(2b)

Microsoft Excel

Google Sheets

LibreOffice Calc

(2a)

TABULATE

=DVD ROM=

– External

– Removable

– Indirect access

=HARD DISK=

– Internal

– Not removable

– Random/Direct access

=MAGNETIC TAPE=

– External

– Removable

– Indirect access

(2b)

(i)Google Sheets

(ii)Lotus Symphony

(iii)Microsoft Excel

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(5a)

– Insert the flash drive into a USB port on your computer.

– With your Microsoft Word document open, click the

“File” tab and select “Save As.”

– Click the “Save In” drop-down menu at the top of the

Save As dialog box.

– Navigate to and click the flash drive. The flash drive is

typically drive letter “E” or “F.”

– Type the name of your document into the File Name

field and click “Save” to save the file to the flash drive.

(5b)

– Choose Start Documents.

– Click the New Folder button in the command bar.

– Type ASSIGNMENTS.

– Press the Enter key to make the new name stick.

– With your document open, click File > Save As.

– Under Save As, select where you want to create your

new folder.

– In the Save As dialog box that opens, click New Folder.

– Type STUDENTS_ASSIGNMENT, and press Enter.

– Click Save.

(5c)

(i)open the folder that contains the word documents you

want to print.

(ii) press [ctrl], and select the files you want to print. (if the

files are adjacent, select the first file in the list, press

[shift], and select the last file in the list.)

(iii) right-click the selection, and select print from the

shortcut menu.

(iv) select the desired print options, and click ok. (the

selected options will apply to all of the documents.)

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