Question 4
(a) Convert 10110112 to its hexadecimal equivalent.
(b) State one difference between a hacker and a scammer.
(c) Identify the parts labeled A, B, C and D on the keyboard shown below.
Observation
(a) First method
First converting 10110112 to Base ten:
10110112 = 1x26 + 0x25 + 1x24 + 1x23 + 0x22 + 1x21 + 1x20
= 1x64 + 0x32 + 1x16 + 1x8+ 0x4 +1x2 + 1x1
= 64 + 0 + 16 + 8 + 0 + 2 + 1
= 9110
Then converting 9110 to Hexadecimal:
DIVIDEND |
DIVISOR |
REMINDER |
16 |
91 |
|
16 |
5 |
11 |
16 |
0 |
5 |
Therefore 9110 = 5(11)16
= 5B16
OR
Second method
Using BCD digits equivalent conversion to Base 16
10110112 is equivalent to: 0101 1011
Conversion to Hexadecimal equivalent: 516 B16
Final answer: 5B16
(b)
A hacker is a person who gains unauthorized access to computer systems through user's account with the aim of stealing or altering data or having other bad intentions.
A scammer is a person who gains unauthorized access to user's account by sending unwanted or inappropriate electronic mail to multiple recipients with the intention to deceive.
OR
They are programmers who havebackend technical knowledge of any software and uses such to break into computer systems of unsuspecting client.
A scammer ensures that his victim remotely gain access to his computer and then uses the confidence tricks to later defraud the unsuspecting client for technical support.
OR
Hackers are also called black hats or crackers with malicious intentions, to steal, exploit, and sell data.
A scammer makes use of windows tools and System directories as tools for their malicious activities. Elderly people, illiterate computer users and free-software patronize are mostly victims of scammers.
(c) PARTS OF COMPUTER KEYBOARD
A - Function Keys
B - Alphanumeric Keys
C - Cursor Control Keys/Arrow keys
D - Numeric Keypad
Candidates were required to convert a number from binary to hexadecimal, state a difference between a hacker and a scammer and also identify parts of a keyboard.