Department of Education
Computer System
Servicing
First Quarter – Week 3
Mary Ann R. Franco
Writer
Yvonne R. Alba
Validator
Schools Division Office – Muntinlupa City
Student Center for Life Skills Bldg., Centennial Ave., Brgy. Tunasan, Muntinlupa City
(02) 8805-9935 / (02) 8805-9940
LEARNING COMPETENCY. Understanding the Computer System
In this lesson, you are expected to:
1. Identify the important components of a PC
2. List the functions of parts of a motherboard correctly
Directions: Multiple Choice. Encircle the correct letter of your answer.
1. It is a non-volatile, meaning it holds data even when the power is ON or OFF.
a. Adapter b. RAM c. CPU d. ROM
2. It is volatile, meaning it holds data only when the power is on. When the
power is off, the contents are lost.
a. CPU b. RAM c. PCI d. ROM
3. It is the main part of a microcomputer, sometimes called the chassis.
a. CPU b.ROM c. RAM d. system unit
4. The main circuit board of a computer. This refers to:
a.CPU b. RAM c. Motherboard d. System unit
5. It performs all of the instructions and calculations that are needed and
manages the flow of information through a computer.
a. CPU b.mobo c. expansion card d. system unit
6. It is a circuit boards (also called interface cards) that enable the computer to
use a peripheral device for which it does not have the necessary connections or
circuit boards.
a. Adapters b. Expansion card c. CPU d. System Unit
7.It converts 120vac (standard house power) into DC voltages that are used by
other components in the PC.
a. Adapter b. Power supply unit c. Motherboard d. RAM
8. It is used as permanent storage for data.
a.CPU b. PCI c.Hardware d. Power Supply Unit
9. It is an optical drive is a storage device that uses lasers to read data on the
optical media
a. motherboard b. PCI c. optical drive d. Power supply unit
10. It accepts data and instructions from the user or from another computer
system
a. Input devices b. optical drive c. Keyboard d. Output device
Before we proceed, let’s see if you can still remember your past lesson.
Directions: Choose your answer from the box below. Write your answer in a
separate sheet of paper.
1. Which of the following lists the correct Hierarchy of Controls from most to
least effective?
A. Elimination,PPE,Substitution,Administrative control, Engineering control
B. Isolation,PPE,Elimination,Engineering control, Administrative control
C. Elimination,Substitution,Engineering control,Administrative control,PPE
D. PPE,Administratice control,Substitution,Elimination,Engineering control
2. Removing flammable material from an area with ignition sources would be
an example of what control measure?
A. Administrative control B. Elimination C. Engineering control D. PPE
3. It is a step-by-step approach to eliminating or reducing risks. This refers to:
A. Administrative control B. Hierarchy control C. Isolation D. PPE
4. Why does employers need conduct hazard assessmet?
A. Avoid accident C. promote accident
B. eliminate workers D. part of the orientation
5. What is OHS stands for?
A. Occupational Health Service C. Occupation Health on Service
B. Occupational Health and Safety D. Occupational Health and Safety
As an aspiring computer technician, it is very important to know the
different components of a computer system. These are the hardware, software
and peopleware.
Each component plays an important role, without each other computer
systems will not work properly.
1. Hardware- the physical, touchable, electronic and mechanical parts of a
computer system.
A. Major hardware components of a computer system
1. System Unit- The main part of a microcomputer, sometimes called the
chassis. It includes the following parts: Motherboard, Microprocessor, Memory
Chips, Buses, Ports, Expansion Slots and Cards.
https://tinyurl.com/2yasmjkp
2. Motherboard / Mainboard / System Board- The main circuit board of a computer.
It contains all the circuits and components that run the computer.
https://tinyurl.com/zf6tyk5d
3. CPU (Central Processing Unit) - The processor is the main “brain” or “heart”
of a computer system. It performs all of the instructions and calculations that
are needed and manages the flow of information through a computer.
https://tinyurl.com/4y4ejmtf
4. Primary storage- (internal storage, main memory or memory) is the
computer's working storage space that holds data, instructions for processing
and processed data (information) waiting to be sent to secondary storage.
Physically, primary storage is a collection of RAM
chips.
Two (2) Types of Memory
a. ROM – (Read Only Memory) ROM is non-volatile, meaning it holds
data even when the
power is ON or OFF.
b. RAM – (Random Access Memory) RAM is volatile, meaning it holds
data only when the
power is on. When the power is off, RAM's contents are lost.
https://tinyurl.com/2u3vfjba
5. Expansion Bus - A bus is a data pathway between several hardware
components inside or outside a computer.
https://tinyurl.com/d6cz5mbb
6.Adapters- Printed-circuit boards (also called interface cards) that enable
the computer to use a peripheral device for which it does not have
the necessary connections or circuit boards.
https://tinyurl.com/ehc8cskj
7. Power Supply Unit (PSU) It converts 120vac (standard house power) into
DC voltages that are used by other components in the PC.
https://tinyurl.com/v7ppe5aw
8. Hard Disk Drive (HDD) - The hard drive is used as permanent storage for
data.
https://tinyurl.com/tbhvazbz
9. Optical Drive- An optical drive is a storage device that uses lasers to read
data on the optical media
https://tinyurl.com/y3yzz9ap
10. Digital Versatile Disc (DVD) - Designed to optically access data stored
on a DVD. A laser moves back and forth near the disk surface and
accesses data at a very fast rate.
https://tinyurl.com/wx3fuabs
B. Input Devices - Accepts data and instructions from the user or from
another computer
system
Two (2) Types of Input Devices
1. Keyboard Entry – Data is inputted to the computer through a keyboard.
2. Direct Entry –Direct-entry devices create machine-readable data on
paper, or magnetic
media, or feed it directly into the computer’s CPU.
C. Output Devices - Any piece of computer hardware that displays results
after the computer has processed the input data that has been entered.
o Computer Display Monitor-
o LCD Projectors
o Smart Board
o Printer
o Speakers
I. Directions: Multiple Choice. Choose the correct letter for each number.
Write your answer in a separate sheet
1. What are some common input devices for a computer system?
A. Keyboard, mouse and image scanner
B. Keyboard, mouse, and printer
C. Monitor, printer, and microphone
D. Keyboard, microphone, video camera, and printer
2. What is typically considered the most important hardware element of a
computer system?
A. Motherboard with the central processing unit and main memory
B. Hard disk drive
C. Monitor
D. Keyboard
3. . _____ is used when computer programs are turned on. It is cleared once
the machine is shut off.
A. The network interface C. The optical disk
B. Random Access Memory (RAM) D. Read Only Memory (ROM)
4. _____ is used to plug peripherals into the system unit.
A. Flash drive B. USB port C. video card D. Audio card
5. _____ is used when computer programs are turned on. It is cleared once
the machine is shut off.
A. Network interface C. Optical disk
B. Random Access Memory (RAM) D. Read Only Memory (ROM)
II. Direction: Label the parts of a computer. Write your answer in spaces
provided.
1. ______________________
2. ______________________
3. ______________________
4. ______________________
5. ______________________
6. ______________________
7. ______________________
8. ______________________
9. ______________________
10. _____________________
https://tinyurl.com/3573n2ru
III. Directions: Answer the given questions in the space provided.
1. As a student, why is it important for you to learn computer hardware?
_______________________________________________________________________
_______________________________________________________________________
2. What do you think is the real life example of RAM and ROM?
______________________________________________________________________
Almost everyone uses a computer daily, but numerous don’t
know how a computer system works or all the different individual pieces that
make up. In fact, numerous individuals incorrectly look at a computer system
and call it CPU, when in truth these are just a part of computer. When these
specific parts are connected together they create a complete and working
gadget with names in computer system. As a user, it is important that you
have a standard understanding of the core parts that mke up your computer.
Directions: Multiple Choice. Encircle the correct letter of your answer.
1. It is a non-volatile, meaning it holds data even when the power is ON or OFF.
a. Adapter b. RAM c. CPU d. ROM
2. It is volatile, meaning it holds data only when the power is on. When the
power is off, the contents are lost.
a. CPU b. RAM c. PCI d. ROM
3. It is the main part of a microcomputer, sometimes called the chassis.
a. CPU b.ROM c. RAM d. system unit
4. The main circuit board of a computer. This refers to:
a.CPU b. RAM c. Motherboard d. System unit
5. It performs all of the instructions and calculations that are needed and
manages the flow of information through a computer.
a. CPU b.mobo c. expansion card d. system unit
6. It is a circuit boards (also called interface cards) that enable the computer to
use a peripheral device for which it does not have the necessary connections or
circuit boards.
a. Adapters b. Expansion card c. CPU d. System Unit
7. It converts 120vac (standard house power) into DC voltages that are used by
other components in the PC.
a. Adapter b. Power supply unit c. Motherboard d. RAM
8. It is used as permanent storage for data.
a.CPU b. PCI c.Hardware d. Power Supply Unit
9. It is an optical drive is a storage device that uses lasers to read data on the
optical media
a. motherboard b. PCI c. optical drive d. Power supply unit
10. It accepts data and instructions from the user or from another computer
system
a. Input devices b. optical drive c. Keyboard d. Output device
Answer Key
1. D
2. B
3. D
4. C
5. A
6. A
7. B
8. A
9. C
10. A
References
K to 12 Basic Education Curriculum Technology and Livelihood Education
Learning Modulehttp://amparonians.weebly.com/uploads/5/4/6/2/54623275/e-
chs_lm_module4_q3-
q4dec.pdf
http://www.depedbataan.com/resources/9/k_to_12_pc_hardware_servicing_learning_m
odu le.pdf
https://www.bleepingcomputer.com/virus-removal/remove-windows-maintenance-suit
