Font size
WorksheetsGroup 8 - chapter 2 slides 14-24
Total questions: 18
Worksheet time: 9mins
Which statement best describes an analog signal?
It has only two states: on or off
It is continuous and varies in strength and quality
It uses the binary system
It represents characters using ASCII code
The binary system uses which two digits?
1 and 9
0 and 2
0 and 1
1 and 2
When you press a letter key on the keyboard, what happens first?
The key creates a scan code for that letter
The monitor displays the letter
The CPU converts binary to ASCII
The system stores the image of the letter
How many bits make up one byte?
2
4
8
16
ASCII is mainly used to
Compress computer files
Represent data and characters using binary codes
Encode images into pixels
Measure computer speed
Memory size is measured in units such as:
i. Kilobytes
ii. Megabytes
iii. Gigabytes
iv. Terabytes
i and ii
ii and iv
ii, iii and iv
i , ii ,iii and iv
One kilobyte (KB) is equal to:
1000 bytes
1024 bytes
2048 bytes
512 bytes
Which of the following is the smallest unit of data in a computer system?
Bit
Byte
Nibble
Word
What does computer memory consist of?
Magnetic components that process data
Electronic components that store data and instructions
Mechanical devices that control input and output
Software that runs the operating system
Which of the following statements about volatile memory is true?
It retains contents when power is off
It loses contents when power is turned off
It is used for long-term storage
It is the same as ROM
Examples of non-volatile memory include:
ROM, flash memory, CMOS
RAM
Cache memory
Registers
What is the binary equivalent of the decimal number 13?
1101
1010
1110
1001
Access time is measured in:
Milliseconds
Hertz
Minutes
Nanoseconds
What does ASCII stand for?
American Standard Code for Information Interchange
Advanced System Code for Internet Interface
Automated System Control for Integrated Input
American Standard Communication for Internal Interchange
Which type of memory has the fastest data access speed?
RAM
Hard disk
Cache memory
SSD
______ ____ is the amount of time it takes the processor to read from memory.
(a)
Which of the following is wrong?
L1 cache -
fastest access
L3 cache -
faster access than L1 and L2 cache
RAM -
slower access than L1, L2 and L3 cache
L2 cache -
slower access than L1 cache
Which of the following is correct?
Millisecond -
One-millionth of a second
Microsecond -
One-trillionth of a second
Picosecond -
One-thousandth of a second
Nanosecond -
One-billionth of a second
