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comp sci > final > Flashcards

final Flashcards

1
Q

Which of the following terms best describes circuit boards, keyboards, and disk
drives?

A

computer hardware

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2
Q

Which of the following is an application package?

A

word proccesor

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3
Q

What is the name of a solid piece of silicon that contains transistors, other
components, and their connections?

A

integrated circuts

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4
Q

Which of the following is a technique for isolating program pieces by eliminating the
ability for one piece to access information in another?

A

information hiding

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5
Q

An abstraction is a mental model that removes or hides complex details

A

true

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6
Q

Ada Augusta, Countess of Lovelace, is credited with being the first programmer.

A

true

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7
Q

Computer software is a collection of programs that provides the instructions that a
computer carries out.

A

true

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8
Q

An algorithm allows us to develop and express solutions to problems.

A

true

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9
Q

Which of the following is the number 0 or any number obtained by repeatedly adding
1 to it?

A

Natural number

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10
Q

What is the largest digit in the decimal number system?

A

9

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11
Q

How many digits are there in the binary number system?

A

2

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12
Q

How many digits are there in the hexadecimal number system?

A

16

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13
Q

What is the decimal value of the largest digit in the hexadecimal number system?

A

15

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14
Q

1Which number represents the value of the base in every number system?

A

10

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15
Q

true or False? The category of numbers called integers includes negative numbers.

A

true

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16
Q

True or False? There is one set of underlying principles governing all numbers
systems.

A

true

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17
Q

True or False? A rational number is any number that can be expressed without a
fractional part.

A

False a rational number is

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18
Q

True or False? The base of a number system determines the number of digit
positions that can be used for any number in the system.

A

false

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19
Q

True or False? A value of a number in any base can be expressed as a polynomial
expression

A

True

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20
Q

True or False? Three octal digits can be stored in one byte

A

false so how many byte?

21
Q

A group of eight bits is called a(n)

A

byte

22
Q

True or False? The computer’s operating system and language translators are
generally known as systems software

A

true

23
Q

true or False? There is one set of underlying principles governing all numbers
systems.

A

true

24
Q

True of False? The value of a number in any base can be expressed as a polynomial
in which each term is made up of a digit multiplied by the base raised to a power.

A

True

25
Q

What is the value of the largest digit in the base X number system (for any positive
integer X)?

A

X-1

26
Q

How many things can be represented using two bits?

A

4

27
Q

What is the minimum number of bits needed to represent 6 things?

A

3

28
Q

How many things can be represented using three bits?

A

8

29
Q

True or False? Every additional bit used doubles the number of things that can be
represented by a binary string

A

true

30
Q

True or False? Information is data that has been organized and/or processed in a
useful way.

A

true

31
Q

True or False? Electronic signals are easier to manage if they transfer only binary
data

A

true

32
Q

Which technique for representing numeric data uses the mantissa to hold the
significant digits of a value?

A

Floating point

33
Q

True or False? The term radix point is used instead of decimal point in bases other
than 10.

A

true

34
Q

When representing numbers using _______________, there are two representations
for zero.

A

signed magnitude.

35
Q

Which problem is caused most directly by the existence of two representations of
zero within a computer?

A

unnecessary complexity

36
Q

Which of the following is a list of characters and the codes used to represent each
one?

A

Character set

37
Q

true or False? A character set is a list of characters and their numeric codes.

A

true

38
Q

The acronym ASCII stands for __________

A

American standard code for information interchange

39
Q

Networks have _______________ restrictions that limit the number of bytes that can
be transmitted from one place to another in a fixed amount of time.

A

Bandwidth

40
Q

Data _______________ is the process of reducing the amount of space needed to
store a piece of data.

A

compression

41
Q

True or False? Run-length encoding replaces common words with shorter symbols

A

false

42
Q

n which text compression technique is it invalid for a bit string that represents a
character to be the prefix of any other string used to represent a character?

A

huffman encoding

43
Q

True or False? Keyword encoding is a type of text compression

A

true

44
Q

_____________ uses a variable-length binary string to represent a character so
that frequently used characters have short codes

A

huffman encoding

45
Q

Recording the voltage level of an audio signal at regular intervals is called what

A

sampling

46
Q

True or False? Audio data is often represented on a computer by sampling the
continuous signal that represents a sound wave

A

true

47
Q

True or False? The JPEG image format is best used for line art, while the GIF format
is superior for photographic images

A

false

48
Q

Which of the following is data about data, such as the resolution of an image being
stored with the image

A

meta data

49
Q
A

comp sci (4 decks)

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