Types of Computer & Their Parts

TYPES OF COMPUTERS AND THEIR PARTS
MULTIPLE CHOICE QUESTIONS
1. What is a computer?
a. A programmable electronic device that processes data via instructions to
output information for future use.
b. Raw facts and figures that has no meaning processed via a set of
instructions.
c. Meaning attached to data letters, pictures, symbols or sounds.
d. All of the above
2. What is Data and Information:
a. Raw facts and figures that has no meaning processed via a set of
instructions and Meaning attached to data letters, pictures, symbols or
sounds.
b. Raw information and meaningful data.
c. Symbols, pictures or sounds.
d. All of the above.
3. Why do users use computers?
a. For their data processing speeds, accuracy, storage capacity and ability to
work for long periods.
b. Computers are very fast and not very accurate.
c. Computers work for long periods without the need for maintenance.
d. Computers stores large amounts of data.
4. A computer system consists of both hardware and software.
a. True.
b. False.
5. Hardware is a set of instructions called programs the computer uses to carry out
tasks while Software are all the parts of the computer you can see and touch and is
also known as peripherals.
a. True
b. False.
6. Tasks the computer usually performs are:
a. Drawing a picture, typing a letter and perform calculations.
b. Word processors, spreadsheets and graphic packages.
c. Hardware and software used to process data.
7. To accomplish a task a computer has to process data in three stages. They are:
a. CU Processing Output
b. Input ALU Hardwar

e
c. Hardware CPU Software
d. Input Processing Output
8. The CPU is also known as:

a. The Brain
b. The Processor
c. The Central Processing Unit
9. What is a machine cycle:
a. Data measured in megahertz.
b. Data measured in gigahertz.
c. A sequence of instructions performed to execute one program instruction.
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10. The speed at which the CPU processes data to convert is measured in what:
a. Megahertz
b. Gigahertz
c. Nanoseconds
d. A and B
11. Machine cycles are measured in nanoseconds picoseconds..
a. True
b. False.
12. The two smaller units of the Processor are CU and ALU.
a. True
b. False
13. Which smaller unit of the CPU directs and coordinates all activities within it and
determines the sequence in which instructions are executed, sending instructions
sequence to other smaller unit.
a. CU
b. ALU
c. PROCESSOR
14. Which smaller unit of the CPU performs all arithmetic and logic functions in a
computer?
a. CU
b. ALU
c. PROCESSOR
15. The CPU primary responsibility is the movement of data and instructions from
itself to main memory and ALU and back. Arrange the CU execution of
instructions in the correct order by placing the execution instructions letter in the
box provided:
a. Sends data to memory unit after processing.
b. Fetches data required by the instruction from memory.
c. Fetches the instruction from memory.
d. Decode the instruction.
e. Send data and instruction to the ALU for processing
16. Which smaller CPU unit contains registers – temporary storage locations that
holds a single instruction or data item needed immediately and frequently.
a. CU
b. ALU
c. PROCESSOR
17. Program Counter (PC) and Instruction Register (IR) are examples of registers.
a. True
b. False
18. Which register example holds the address of the current instruction being
processed?
a. Program Counter.
b. Instruction Register.
c. Control Unit
d. Arithmetic Logic Unit.
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19. Which register example hold the instruction itself?

a. Program Counter.
b. Instruction Register.
c. Control Unit
d. Arithmetic Logic Unit.
20. Central Processing Unit, Input Devices, Output Devices, Main Memory,
Arithmetic and Logic Unit (ALU), Control Unit (CU), Secondary or Auxilliary
Storage Devices/Backing Store/Disk Storage. Use the word to complete the
diagram.
21. Main Memory holds data and instructions being processed by the computer and is
this memory is directly accessible by the CPU.
a. True
b. False.
22. It is difficult to classify computer systems on the basis of their system
performance, as newer, smaller computer systems outperform their larger models
of yesteryear.
a. True
b. False.
23. The different types of computer are:
a. Personal Computers (PCs), Laptops and Minicomputers
b. Mainframes, Supercomputers and Tablet PC
c. Electronic Organizers and Palmtop Computers and Embedded Computers
d. ALL OF THE ABOVE.
24. Label the different Types of Computers using: Supercomputer, Minicomputers,
Mainframes, Tablet PC, Electronic Organizers, Palmtop Computers,
Embedded Computers, Personal Computers, Laptops, Notebooks, Sub-
notebooks.
*/ * used for number crunching scientific simulations,

research and developments in energy, space
exploration, medicine and industry.
* designed to process complex scientific applications.
* are the most expensive computers in the world

costing millions of dollars
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Personal Computer also known as:
C * comes in different size, shapes and colours.

* used by one person at a time.
* consists of Monitor, System Unit, Mouse, Keyboard.
* designed to perform input, control, arithmetic/logic,
output and storage functions.
* executes software program instructions to perform a wide
variety of tasks.
• Portable version of PC with flat LCD monitor.

• Weighs 1-4 kilograms.
• There are two types: Notebooks and Sub-
Notebooks.
• Notebook: weighs 2-4 kilogram.
• Is roughly the size of a thick large notebook (35 *
25 * 4 cm)
• Touch sensitive pad serves as mouse.
• Tucked in briefcases.
• Gets its power from electrical outlet or
rechargeable batteries
• Just as powerful as PCs but cost more.
• Sub-Notebooks: weighs1/2 kilogram.
• Fits in a large jacket pocket.
• Small colour screen, keyboard without mouse
function.
• Performs many function of notebooks to a lesser
degree
• Looks like a notebook.

• Data is entered via keyboard, touch screen or
digitizing tablet with a special pen called a
stylus
• Fits in the palm of your hand, shirt pocket.

• Less powerful than Notebooks & sub-notebooks.
• Weighs 300 grams on average.
• Small keyboard, palm size screen with special
pen.
• More powerful than electronic organizers.
• Used mainly to store appointments, addresses,

and telephone numbers and “to do lists”.
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• Cost, storage and processing capabilities

between a PC and Mainframe.
• Used in small manufacturing plants, research
labs and businesses.
• Handles the processing needs of multiple
users.
• Many users share access to a central
hardware through stations called Terminals.
• Supports dozens of terminals
• A terminal consists of keyboard, monitor,
wire that connects terminal to Computer
system.
• Powerful and expensive computers.

• Has faster processing speeds and
greater storage capacity than typical
mini.
• Handles more than a thousand users
at a time.
• Found in large organizations such as
banks, insurance companies, and
government agencies.
• Performs tasks that require a lot of
computational power, bulk data
processing such as censuses,
industry/consumer statistics and bank
transactions.
• Examples include IBM zSeries the
most powerful mainframe available.
• Special purpose compuer used inside a device

for a specific function.
• Has a single microprocessor board with
programs stored in ROM.
• Connect to sensors- devices which detects
changes in environment such as lights,
temperature or pressure
• Hardware output devices convert electrical
control signal into physical action.
• Examples as cameras, cars, clocks,
microwaves.
25. Computers are classified broadly into five generations based on the electronic component used to
build them. Label the generation, its main characteristic, computers built in the generation,
list the component used to build its computers and the software used to programs it from the
list below:
First Generation (1945-1956): Vacuum tube\valve, unreliable, machine language, Harvard Mark
1 and ENIAC.
Second Generation (1956-1963): Transistors, faster, smaller, energy-efficient and more reliable
computers, assembly language, IBM 1400 & 1600 and UNIVAC III.
Third Generation (1964- 1970): Integrate Circuit (IC), more faster, smaller, energy-efficient and
reliable computers, high-level languages, UNIVAC 9000 AND NCR century series.
Fourth Generation (1971-present): LSI, ULSI, IC, cheaper computers, increased processing
capabilities, IBM system 3090 and RISC 6000.
Fifth Generation (present – future): computer mimic human abilities, artificial intelligence (AI),
parallel processing, performs multiple simultaneous operations using a single microprocessor chip.
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TYPES OF COMPUTERS AND THEIR PARTS

MULTIPLE CHOICE QUESTIONS

b. Input ALU Hardwar

d. Input Processing Output

8. The CPU is also known as:

b. Fetches data required by the instruction from memory.

c. Fetches the instruction from memory.

d. Decode the instruction.

e. Send data and instruction to the ALU for processing

19. Which register example hold the instruction itself?

*/ * used for number crunching scientific simulations,

* designed to process complex scientific applications.

* are the most expensive computers in the world

Personal Computer also known as:

C * comes in different size, shapes and colours.

• Portable version of PC with flat LCD monitor.

• Looks like a notebook.

• Fits in the palm of your hand, shirt pocket.

• Used mainly to store appointments, addresses,

• Cost, storage and processing capabilities

• Powerful and expensive computers.

• Special purpose compuer used inside a device

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/ used for number crunching scientific simulations,