Font size
WorksheetsComputer Science
Total questions: 20
Worksheet time: 15mins
4 Things common to all computers
INPUT, STORAGE, POWER MANAGEMENT, OUTPUT
INPUT, EXECUTE, PROCESSING, OUTPUT
INPUT, STORAGE, PROCESSING, OUTPUT
DATA TYPE, STORAGE, PROGRAMMING, OUTPUT
SERIES OF COMMANDS
PROCESSING
FUNCTION
STORAGE
ALGORITHM
WHICH OF THE FOLLOWINGS IS NOT RELATED TO BINARY DATA
TRUE - FALSE
0 - 1
YES - NO
DO - DON NOT
ON-OFF STATE OF A SINGLE WIRE IS CALLED
(a)
IN DECIMAL NUMBETR SYSTEM WE HAVE DIGITS FROM ... TO ...
1 - 10
0 - 9
1 - 100
0 - 99
WITH 8 BITS YOU CAN STORE NUMBERS BETWEEN ... AND ...
1-255
1-100
0-255
0-100
a tiny physical device that acts like a digital switch in computers
MODEM
SWITCH
UPS
TRANSISTOR
Computers use ... to transform the 1s and 0s from input wires.
ELECTRICITY
TRANSISTORS
LOGIC GATES
WIRES
IF THE INPUT IS 1, THE OUTPUT IS 0:
NOT gate
XOR gate
OR gate
And gate
0
1 1
1 0
1
1
1 0
0
0 1
Choose correct answers
LED (Light emitting diode) - OUTPUT
pH sensor - OUTPUT
moisture sensor - INPUT
temperature sensor - OUTPUT
WHAT IS MEMORY BUS?
When input devices send binary data to a CPU, it immediately stores that data
Memory is designed for fast access and typically stores only the data and instructions that are necessary for the currently running programs on a computer
Computers also vary a lot in memory size, usually because of physical size constraints.
High speed communication transfer system, made from wires, conductors, or optical fibers
SECONDARY MEMORY IS ALSO KNOWN AS ... (2 ANSWERS)
input memry
external memory
auxiliary storage
processing memory
microcomputer that's often used by hobbyists to create projects like animated LED displays or bird watchers
Arduino Uno
Macintosh
Android
Raspberry PI
File sizes are always measured in
bytes
bits
megabytes
gygabytes
For the simplest of images, computers can use a compression algorithm called
file size compression
image compression
run-length encoding
bitmaps
The very first network connections re-used the ... of telephone lines, communicating binary data via pulses of electricity.
iron cables
steel cables
copper cables
CAT-5E cable
... compression algorithms reduce the size of files without losing any information in the file, which means that we can reconstruct the original data from the compressed file.
BITMAP
COMPUTER
LOSSLESS
LOSSY
... are techniques that reduce file size by discarding the less important information.
bitmap compression algorithms
image compression algorithms
lossy compression algorithms
lossless compression algorithms
