ITM 207 Test Questions and Answers | 2025/26
Update | 100% Correct
Byte
8 bits
wordlength of a computer
- determined by the number of bits in a word
- usually a multiple of 8 (ex. 32-bit machine, 64-bit machine)
Bit / Binary Digit
- computer storage units
- 1 or 0
- base 2
digits for bases 10 or higher
A = 10
B = 11
C = 12
D = 13
E = 14
F = 15
positional notation
Ex. 642 in base 10
,= 6(10^2) + 6(10^1) + 6(10^0)
*start counting positions from 0, from LEFT to RIGHT
base
- determines the number of different digit symbols and the values of digit positions
- numbers that include the base, or a greater number, do not exist in that base
(ex. 372 does not exist in base 7, or base 3 or base 2)
integer
- natural numbers
- negative number
(ex. 249, -3, 0, 1 , -2)
rational number
- an integer or the quotient of two integers (fraction)
(ex. -2/5, 3/6, 0, -1, -249)
natural number
zero and any counter numbers (numbers you can count with ur fingers)
(0, 1, 2, 3, 4, 5, 6...)
negative number
,values less than 0, with - sign
(-1, -2, -3, -4)
multimedia devices
- computers
- store, present & modify:
↳ numbers
↳ text
↳ audio
↳ images & graphics
↳ video
- stored as bits
data compression
reducing space needed to store a piece of data or the bandwidth to transmit it
compression ratio
compressed data ⌹ original data
lossless compression
data can be retrieved without any loss of original information
lossy compression
, some information may be lost in process of compression
analog data
↳ continuous representation
↳ analogous to the actual information it represents
↳ computers don't work well with analog so data must be digitized
(ex. thermometer)
digital data
- discrete representation
- breaks info up into separate elements & represents them separately (digitizing)
analog signal
↳ type of electronic signal
↳ voltage continually fluctuates up and down
digital signal
↳ has only a high or low state, corresponding to the two binary digits (1, 0)
voltage
↳ fluctuates due to environmental effects
relocking
periodically, a digital signal is relocked to regain its original signal when it degrades
signed-magnitude representation
Update | 100% Correct
Byte
8 bits
wordlength of a computer
- determined by the number of bits in a word
- usually a multiple of 8 (ex. 32-bit machine, 64-bit machine)
Bit / Binary Digit
- computer storage units
- 1 or 0
- base 2
digits for bases 10 or higher
A = 10
B = 11
C = 12
D = 13
E = 14
F = 15
positional notation
Ex. 642 in base 10
,= 6(10^2) + 6(10^1) + 6(10^0)
*start counting positions from 0, from LEFT to RIGHT
base
- determines the number of different digit symbols and the values of digit positions
- numbers that include the base, or a greater number, do not exist in that base
(ex. 372 does not exist in base 7, or base 3 or base 2)
integer
- natural numbers
- negative number
(ex. 249, -3, 0, 1 , -2)
rational number
- an integer or the quotient of two integers (fraction)
(ex. -2/5, 3/6, 0, -1, -249)
natural number
zero and any counter numbers (numbers you can count with ur fingers)
(0, 1, 2, 3, 4, 5, 6...)
negative number
,values less than 0, with - sign
(-1, -2, -3, -4)
multimedia devices
- computers
- store, present & modify:
↳ numbers
↳ text
↳ audio
↳ images & graphics
↳ video
- stored as bits
data compression
reducing space needed to store a piece of data or the bandwidth to transmit it
compression ratio
compressed data ⌹ original data
lossless compression
data can be retrieved without any loss of original information
lossy compression
, some information may be lost in process of compression
analog data
↳ continuous representation
↳ analogous to the actual information it represents
↳ computers don't work well with analog so data must be digitized
(ex. thermometer)
digital data
- discrete representation
- breaks info up into separate elements & represents them separately (digitizing)
analog signal
↳ type of electronic signal
↳ voltage continually fluctuates up and down
digital signal
↳ has only a high or low state, corresponding to the two binary digits (1, 0)
voltage
↳ fluctuates due to environmental effects
relocking
periodically, a digital signal is relocked to regain its original signal when it degrades
signed-magnitude representation
