Pharos University in Alexandria
Faculty of Engineering
First Year Students
Computer Skills
Course code : UEC01
Information Technology
Sheet 1 Answer
Answer the following questions:
I) State whether the following sentences are TRUE or FALSE, and correct the false ones:
1. Input device is a piece of hardware that supplies input to a computer.
(  )
2. Scanner is an output device that produces output on paper.
Printer is an output device that produces output on paper.
(  )
3. Both printer and scanners are input devices.
Both Keyboard and scanners are input devices.
(  )
4. Information is raw, unorganized facts.
Data is raw, unorganized facts.
(  )
5. The hardware is the instructions that make the computer work.
The Software is the instructions that make the computer work.
(  )
6. Floppy Disk is a storage device that store large amount of data.
Floppy Disk is a storage device that store Small amount of data.
(  )
7. A trackball should be moved to change the pointer position on the screen.
A Mouse should be moved to change the pointer position on the screen.
(  )
8. CPU performs all the calculations within the computer.
(  )
9. Hardware is a term that only applies to storage devices.
Hardware is a term that all the physical components.
(  )
10. BIOS is an example of Volatile Memory.
BIOS is an example of Non Volatile Memory.
(  )
II ) Choose the correct answer:
1. An input device that moves an onscreen pointer, such as an arrow or insertion point, to
allow the user to select objects on the screen :
(a) Mouse.
(b) Pointing devices.
(c) Monitor.
2. A peripheral device that receives data from a computer and presents it in a form that a
person can understand is called a(n):
(a) Receiver.
(b) Output device.
(c) Input device.
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3. The term "hardware" refers to:
(a) The physical component of a computer including the digital circuitry.
(b) The input and output devices used by a computer system.
(c) The hard disk drives and the data and programs stored on them.
4. Which of the following is an input device?
(a) Printer.
(b) Scanner.
(c) Plotter.
5. Performing operations on data that has been input into a computer to convert that input to
output.
(a) Processing.
(b) Compilation.
(c) Conversion.
6. _________ is used to store your operating system your application program and your data.
(a) ROM.
(b) Hard disk.
(c) CPU.
7. A touch screen presents a (an) __________ device.
(a) Output.
(b) Input.
(c) Input / Output.
8. The Speed of the CPU is measured in:
(a) Giga Byte
(b) Giga Hertz
(c) Giga watt
9. Performs the mathematical calculations and comparisons using data stored within the CPU
registers.
(a) ALU
(b) Control Unit
(c)
BUS
10. Megabyte is approximately:
(a) 1000 kilobyte
(b) 1000 terabyte
(c) 1000 byte
IV- Discus the difference between Serial Port and Parallel Port.
Serial Port: is a socket located at the back of your computer which enables you to connect items to
the computer, such as a modem. They are commonly labeled as COM1 or COM2.
Parallel Port: is a socket located at the back of your computer which enables you to connect items
to the computer, such as a printer. It is commonly labeled as LPT1 or LPT2.
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V- State two different types of:
(a) Ports. (Network Port, FireWire Port)
(b) Computer Memory. (RAM, ROM)
(c) Printers. (Laser printers , Inkjet printers)
VI- Order the following:
------2-------
Byte
------1-------
Bit
------4-------
Megabyte
--------5------
Gigabyte
-----3---------
Kilobyte
-----6---------
Terabyte
VII- Convert the following from the binary system to Decimal numbering system:
(10101101)2

𝟏
𝟐𝟕
𝟎
𝟐𝟔
𝟏
𝟐𝟓
𝟏
𝟎
𝟏
𝟏
𝟎
𝟏
𝟎
𝟏

×
×
×
×
×
×
×
×
𝟎
𝟐𝟒
𝟐𝟎
𝟐𝟏
𝟐𝟐
𝟐𝟑
𝟐𝟒
𝟐𝟓
𝟐𝟔
𝟐𝟕
𝟏
𝟐𝟑
𝟏
𝟐𝟐
𝟎
𝟐𝟏
𝟏
𝟐𝟎
=𝟏
=𝟎
=𝟒
=𝟖
=𝟎
= 𝟑𝟐
=𝟎
= 𝟏𝟐𝟖
1 + 0 + 4 + 8 + 0 + 32 + 0 + 128
=173
(1001001)2
𝟏
𝟐𝟔
𝟎
𝟐𝟓
𝟏
𝟎
𝟎
𝟏
𝟎
𝟎
𝟏
×
×
×
×
×
×
×
𝟎
𝟐𝟒
𝟐𝟎
𝟐𝟏
𝟐𝟐
𝟐𝟑
𝟐𝟒
𝟐𝟓
𝟐𝟔
𝟏
𝟐𝟑
=𝟏
=𝟎
=𝟎
=𝟖
=𝟎
=𝟎
= 𝟔𝟒
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𝟎
𝟐𝟐
𝟎
𝟐𝟏
𝟏
𝟐𝟎
1 + 0 + 0 + 8 + 0 + 0 + 64
=73
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