exam 1 computer concepts quiz 2 chapter 2 and 3
If A is 11111110 and B is 00000010, evaluate the following expression using two's complement: -B
11111110
convert decimal 11 to octal
13
in base 16, the digit E corresponds to what decimal value?
14
if 891 is a number in base 13, how many 1s are there
1470
convert hexadecimal 10 to decimal
16
high color uses _____ bits
16
how many things can be represented with 4 bits
16
perform the following hexadecimal addition: 19AB6 + 43 =
19AF9
convert 777 to hexadecimal
1FF
the number zero and any number obtained by repeatedly adding one to it is a ____
natural number
the number zero and any number obtained by repeatedly adding one to it is a _____
natural number
-1/3 is a ____ number
negative
all integers and all quotients of two integers (division by zero excluded) belong to the category _____
negative number
which is a unit of an abstract mathematical system subject to the laws of arithmetic
number
what does pulse-code modulation (PCM) describe
the behavior of a digital signal, which jumps between two extremes
How would the following string of characters be represented using run-length encoding? AAAABBBCCCCCCCCDDDD hi there EEEEEEEEEFF
*A4BBB*C8*D4 hi there *E9FF
If A is 5 and B is -7, find the solution to the following operation: B-A
-12
if W is 17, and Y is -29, evaluate the expression: Y-W
-46
convert binary 0 to octal
0
convert the real number 0.10 to binary using 5 binary places
0.00011
covert the real number 0.50 to binary using 5 binary places
0.10000
Convert the real number 0.26 to octal using 5 octal places.
0.20000
convert decimal 1 to hexadecimal
1
convert decimal 4 to binary
100
convert hexadecimal 8 to binary
1000
convert decimal 69 to binary
1000101
covert octal 521 to hexadecimal
151
convert decimal 1066 to octal
2052
if 891 is a number in base 16, how many 1s are there?
2193
convert hexadecimal A9 to octal
251
convert decimal 1492 to octal
2724
covert decimal 43 to hexadecimal
2B
what is the minimum number of bits needed to represent 6 things
3
how many things can be represented with 5 bits?
32
the formula to compute the negative representation in a fixed-size number scheme is negative(I)=10^k-I, where k is the number of digits. If k in the formula for the ten's complement is 6, how much would be 35768 represented?
35768
if W is 17, and X is 28, evaluate the following expression: X + W
45
the formula to compute the negative representation in a fixed-size number scheme is negative(I)=10^k-I, where k is the number of digits. If k in the formula for the ten's complement is 6, how many positive integers can be represented?
499,999
covert decimal 321 to octal
501
convert 111 from base 8 to base 10
73
how many digits are there in the octal number system
8
how many things can be represented using three bits
8
convert binary 1001 to decimal
9
covert binary 1001 to decimal
9
perform the following hexadecimal subtraction: A9F8 - 1492
9566
the highest digit in base 16 is
F
the most popular audio format used today is the _____ format
MP3
which audio format is the most popular today
MP3
what does code *X5*A9 represent using run-length encoding
XXXXXAAAAAAAAA
_____ data is a continuous representation of information
analog
networks have _____ restrictions that limit the number of bytes that can be transmitted from one place to another in a fixed amount of time
bandwidth
a group of eight bits is called a(n) ____
byte
which of the following is a list of characters and the codes used to represent each one
character set
which of the following is a list of characters and the codes used to represent each one?
character set
the "c" in the acronym ASCII stands for ____
code
which of the following characters are not represented in the ASCII character set
cyrillic characters
which is the lowest base in which the number 987 could be a valid number
decimal
______ data is discrete representation of information
digital
the rules for converting base-10 numbers to other bases involve?
dividing the base into which you are converting the number
a byte is made up of six binary digits
false
bandwidth is the term that describes the size of wires connecting two computers in a network
false
binary numbers are important in computing because a binary number can be converted into every other base
false
binary numbers can be read off in hexadecimal but not in octal
false
converting from base 10 to other bases involved dividing by the base into which you are converting until the quotient is 1
false
four bits can be used to represent 32 unique things
false
grace murray hopper is credited with being the first programmer
false
in the ASCII character set, there is no distinction made between uppercase and lowercase letters
false
negative numbers cannot be presented using the fixed-sized number representation technique
false
run-length encoding replaces common words with shorter symbols
false
the JPEG image format is best used for line art, while GIF format is superior for photographic images
false
the digits used in base 8 are 1 through 8
false
the number of bits in a word is the same on all machines
false
the value of each position in a number system is determined by subtracting the base from the position number
false
thicker monitors produce more vibrant colors because they have a higher color depth
false
what is not a raster-graphic format
flash
which technique for representing numeric data uses the mantissa to hold the significant digits of a value
floating point
huffman code are created based on the _____ of the character
frequency of use
the technique in which an application supports only a certain number of specific colors, creating a palette from which to choose, is called ______ color
indexed
natural numbers, negatives of a natural number, and zero belong to the category _____
integer numbers
what is the best format for photographic color images
jpeg
which of the following is data about data, such as the resolution of an image being stored with the image?
metadata
1066 is a ____ number
natural
1066 is a _____ number
natural
the rightmost digit of a number is the ____ position in any base
ones
if the number base is other than base ten, we call the decimal point the ______ point
radix
1.333333 is a ______ number
rational
2/5 is a _____ number
rational
6.2 is a ______ number
rational
recording the voltage level of an audio signal at regular intervals is
sampling
the representation for numbers you've used since grade school is called ______
signed-magnitude representation
A CD stores audio information in a binary format
true
Bitmap, GIF, and JPEG are all examples of raster-graphics formats
true
a digital signal represents one of two values at any point in time
true
a value of a number in any base can be expressed as a polynomial expression
true
an RGB value is made up of three values that represent relative contributions of the primary colors, red, green, and blue
true
an RGB value represents a color using three numeric values
true
an audio single is digitized by sampling it at regular intervals
true
every additional bit used doubles the number of things that can be represented by a binary string
true
huffman encoding uses variable length binary strings to represent particular characters
true
in a signed-magnitude representation of numbers, there are two representations of 0
true
information is data that has been organized and/or processed in a useful way
true
keyword encoding is a type of text compression Convert the real number 0.26 to octal using 5 octal places.
true
keyword encoding replaces frequently used words with a single character
true
lossless compression means that data can be retrieved without losing any of the original information
true
positional notation is possible due to the concept of zero
true
representing a number in base 5 sometimes requires more digits than representing that same number in base 10
true
starting from the right, every group of four binary digits can be read as one hexadecimal digit
true
the base of a number system determines the number of digits used in the system
true
the base of the binary number system is 2
true
the digits used in base 8 are 0 through 7
true
the term "radix point" is used instead of decimal point in bases other than 10
true
two hexadecimal digits can be stored in one byte
true
vector graphics represent images in terms of lines and geometric shapes
true
which problem is caused most directly by the existence of two representations of zero within a computer?
unnecessary complexity
which unit of binary storage has a size that is processor-dependent
word
