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CUS3701 EXAM WITH WELL DETAILED ANSWERS [ ALREADY GRADED A] 2024
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CUS3701 EXAM WITH WELL DETAILED ANSWERS [ ALREADY GRADED A] 2024
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CUS3701 EXAM WITH WELL DETAILED ANSWERS [ ALREADY GRADED A] 2024Question 1: Describe the main components of a computer system and their
functions.
Answer: A computer system comprises several key components, each with distinct functions:
1. Central Processing Unit (CPU): Often considered the brain of the computer, the CPU
performs all the instructions of a computer program by carrying out basic arithmetic,
logical, control, and input/output (I/O) operations.
2. Memory (RAM): Random Access Memory (RAM) is the computer's short-term memory,
which stores data and machine code currently being used. It allows for quick read and
write access to a storage medium.
3. Storage (Hard Drive/SSD): This is the computer's long-term memory, where all data,
programs, and the operating system are stored. Hard Drives (HDD) are mechanical,
whereas Solid State Drives (SSD) are faster and use flash memory.
4. Motherboard: The main circuit board that houses the CPU, memory, and other essential
components. It facilitates communication between all parts of the computer.
5. Power Supply Unit (PSU): Converts electricity from an outlet into a usable form for the
computer. It supplies power to all components within the computer.
6. Input Devices: Include keyboards, mice, scanners, and any other devices that allow
users to input data into the computer.
7. Output Devices: Include monitors, printers, and speakers, which are used to convey
information from the computer to the user.
8. Graphics Processing Unit (GPU): A specialized processor designed to accelerate
graphics rendering. It is used in gaming, professional graphics work, and some
computational tasks.
Question 2: Explain the differences between operating systems and
application software.
Answer: Operating systems (OS) and application software serve different roles in a computer
system:
1. Operating System (OS):
○ Function: Manages computer hardware and software resources and provides
common services for computer programs.
○ Examples: Windows, macOS, Linux, Android, iOS.
○ Roles:
■ Resource Management: Allocates CPU time, memory space, and
storage among various applications and tasks.
■ User Interface: Provides a user interface (command line or graphical
user interface) to interact with the system.
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