This paper concentrates on the primary theme of A supermarket uses several different input devices to collect data from staff and customers. Describe in detail THREE input devices which might be in use in a supermarket. For EACH device state: • The purpose of the device • The user (customer, staff in which you have to explain and evaluate its intricate aspects in detail. In addition to this, this paper has been reviewed and purchased by most of the students hence; it has been rated 4.8 points on the scale of 5 points. Besides, the price of this paper starts from £ 40. For more details and full access to the paper, please refer to the site.
HARDWARE
& OPERATING SYSTEMS
Instructions to candidates:
a) Time
allowed: Three hours (plus an extra ten minutes’ reading time at the start – do
not write anything during this time)
b)
Answer any FIVE questions
c) All
questions carry equal marks. Marks for each question are shown in [ ]
d) Mark
allocation should determine the length of your answer and the time you spend on
it. Generally, one mark is awarded for each valid point
e)
Ensure that you pay particular attention to words underlined, in CAPITALS or in
bold. FEW OR NO
MARKS
will be awarded to any question where these are ignored
f) Use
RTL (Register Transfer Language) to define actions in questions related to
Fetch-Execute cycle or assembly language programming
g) Read
all sections of any question before attempting any part of it
h) No
computer equipment, books or notes may be used in this examination
1. a) A
supermarket uses several different input devices to collect data from staff and
customers.
Describe
in detail THREE input devices which might be in use in a supermarket.
For
EACH device state:
• The
purpose of the device
• The
user (customer, staff or both)
• The
form which the data take
• How
the device reads the data [5 each]
b)
Explain in detail the purpose of double buffering and how it operates. [5]
2. a)
The manager of a busy office wishes to buy a printer and asks for your advice.
The office prints a lot of large documents and would like to occasionally print
in colour. They are considering buying either an inkjet printer or a laser
printer. Write a report describing the functionality of EACH of these two types
of printer. Highlight the advantages and disadvantages that each type will
offer. [10]
b) The
use of assistive technology is important in enabling disabled users to access
computers.
Name
TWO assistive technology devices (input or output) which enable physically
disabled users to use a computer. For EACH device explain:
• the
purpose of the device
• how
the device works, referring to any hardware or software elements
• any
issues which may arise in implementing the device [10]
3. a)
For EACH of the data structures STACK and QUEUE:
i.
explain the purpose of the data structure, giving ONE possible use of EACH data
structure
ii.
list the basic operations which can be performed on EACH data structure
iii. Describe
how EACH data structure might be stored in a computer [10]
b)
Write a pseudo-code algorithm to insert an element at the front of a linked
list. [10]
Continued