WAEC 2017 Computer Studies Obj and Theory Answer – May/June Expo

100% Correct WAEC Computer Studies Essay/Theory and OBJ Questions and Answer Solution – May/June 2017 Expo Runs Real and Verified

Verified Computer OBJ
1A 2C 3D 4C 5B 6D 7D 8C 9C 10C
11B 12A 13D 14D 15C 16B 17B 18C 19D 20B
41D 42B 43D 44D 45C 46B 47C 48C 49D 50B



1a) An input device is any hardware device that

sends data to a computer, allowing you to
interact with and control the computer. The
picture shows a Logitech trackball mouse, an
example of an input device.
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.
===========================
(3a)
information is an analyzed or processed data, which is now
more meaningful and decisions can be made based on its
data and information is connected.
Communication technology is the activity of designing,
constructing and maintaining communication systems. In
the modern era it is referred to as ICT. This is information
and communications technology, and includes any
communication device or application such as radio and
television.
(3b)
LAN-local area network
GPS-global postioning Service.
IP-internet protocol
 (3b)
LAN-local area network
GPS-global postioning Service.
IP-internet protocol
==========================
(4a)TABULATE
RAM: is the memory available for the operating system, programs and processes to use when the computer is running.
ROM: is the memory that comes with your computer that is pre-written to hold the instructions for booting-up the computer.
RAM:requires a flow of electricity to retain data (e.g. the computer powered on).
ROM:will retain data without the flow of electricity (e.g. when computer is powered off)
(4b)ii.
+Password-protect
+documents encryption
+Secure wireless transmissions
========================
HTML =Hypertext Markup Language
HTTP =HyperText Transfer ProtocoL
ISP =Internet service provider
SMTP =Simple Mail Transfer Protocol
=========================
5a)
10110112
=1*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 0*2^2 + 1*2^1 + 1*2^0
=1*64 + 0*32 + 1*16 + 1*8 + 0*4 + 1*2 + 1*1
=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.

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