Advanced level 2025 South regional mock ICT 2
Advanced level 2025 South regional mock ICT 2
QUESTION 1:
i) State what is meant by the terms
a) Parallel data transmission (1mark)
b) Serial data transmission (1mark)
c) Give one benefit of each type of data transmission (2marks)
ii) Complete the truth table for the following logic circuit:
(4marks)
iii) Viruses, Pharming and Phishing are all examples of potential internet security issues.
Explain what is meant by each of these three terms (3marks)
iv) One of the key features of Von Neumann computer architectures is the use of buses.
State and describe the three buses. (3marks)
v) What is the function of the following protocols?
a) HTTP (1mark)
b) ICMP (1mark)
QUESTION 2:
i) A large supermarket has several EPOS (Electronic Point of Sales) terminal linked to a computer.
Each product on sale has a barcode on it. The barcode is made up of a pattern of bars.
a) Identify the type of device used to input data from the barcode. (1mark)
b) Identify what the pattern of bars represents. (1mark)
c) Give two benefits to the customers when barcode are used at the checkout. (2marks)
| ii) | Mention and briefly explain 02 methods used by an operating system to protect the computer system and files from unauthorised access. |
(4marks) |
| (iii) Various methods are used to modernise an existing information system. The System Development Lifecycle (SDLC) |
||
| a) Define System Development Lifecycle (SDLC). | (1mark) |
b) List in an orderly manner the 6 essential stages of SDLC. (4marks)
c) Use the 6 essential stages of the System Development Lifecycle mentioned in iii. (b) above,
Write the names of phases in the blanks below. (3marks)
| Task | Stages |
| 1 | Interface, Database and Design of Software Architecture |
| 2 | Creating a Database and computer programs |
| 3 | Gather information, identify feasibility. |
| 4 | Checking accuracy and safety |
| 5 | Direct implementation Parallel implementation Pilot implementation Phase implementation |
| 6 | Make changes as requested by the users after launching the system |
(iv) Differentiate between batch processing and real time processing operating system?
