Waec 2017 Computer Obj And Theory Answers – May/June Expo

Exam Time:
Computer Studies 2 (Essay) 3:00pm – 4:00pm
Computer Studies 2 (Objective) 4:00pm – 5:00pm
COMPUTER OBJ:
1A 2C 3D 4C 5B 6D 7D 8C 9C 10C
11B 12A 13D 14D 15C 16B 17B 18C 19D 20B
21B 22A 23C 24A 25A 26C 27C 28A 29C 30A
31A 32B 33A 34D 35D 36C 37D 38C 39C 40B
41D 42B 43D 44D 45C 46B 47C 48C 49D 50B

MORE COMING..

NOTE: ^ means rise to power
5a)
10110112
=12^6 + 02^5 + 12^4 + 12^3 + 02^2 + 12^1 + 12^0
=1
64 + 032 + 116 + 18 + 04 + 12 + 11
=64 + 0 + 16 + 8 + 0 + 2 + 1
=91
tabulate:
16|91
5 r B
O r 5
10110112=5B16
were B is 11
5b)
HACKER: A hack group getting main owner on an XAT chat
without authorization.
SCAMMER: Tricking an internet user into giving you his/her
login name and password
5c)
i)HTML: Hypertext Markup Language
ii)HTTP: Hypertext Transfer Protocol
iii)ISP: Internet Service Language

iv)SMTP: Simple Mail Transfer Protocol.

1a)
An input device is any hardware device that sends data to
a computer, allowing you to interact with and control the
computer.
1b)
i)key board
ii)The mouse
1c)
i) Logic gates are digital components that typically work
two levels of voltage and determine how a component
conducts electricity.
ii) Logic gates use Boolean equations and switch tables.
1di)
A,B
OR —-)—- A+B
1dii)
and gate
A—- AB

B—- AND

4a)
complet the table
1)RAM is volatile i.e. its contents are lost when the
ddevice is powered off. ROM is non-volatile i.e. its
contents are retained even when the device is powered
off.
2)RAM allows the computer to read data quickly to run
applications. It allows reading and writing.
ROM stores the program required to initially boot the
computer. It only allows reading.
4b)
i)Searching and Organizing
ii)Ease of Access Center
iii)Default Programs
iv)Remote Desktop Connection
4c)
i)antivirus programs
ii)registry cleaners

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