WGU D684 INTRODUCTION TO COMPUTER SCIENCE
EXAM 2025/2026 QUESTIONS AND CORRECT
ANSWERS
American Standard Code for Information Interchange (ASCII) -
✔✔ANSWER✔✔-a standard encoding system for text characters that uses
numeric values to represent letters, numbers, and symbols
analog data - ✔✔ANSWER✔✔-data represented in a continuous and variable
form
bandwidth - ✔✔ANSWER✔✔-the maximum rate of data transfer across a
network or communication channel, usually measured in bits per second
binary - ✔✔ANSWER✔✔-a numerical system that uses only two digits, zero
and one, to represent data in computing
Boolean expression - ✔✔ANSWER✔✔-a logical statement that can only be true
or false and uses operators like AND, OR, and NOT
character - ✔✔ANSWER✔✔-a single letter, digit, or symbol used in writing text
character set - ✔✔ANSWER✔✔-a collection of characters that a computer can
recognize and process, like ASCII or Unicode
compression ratio - ✔✔ANSWER✔✔-the ratio of the original data size to the
compressed data size, indicating how much the data has been reduced
,control structure - ✔✔ANSWER✔✔-constructs in programming that control
the flow of execution, such as loops and conditional statements
data - ✔✔ANSWER✔✔-raw facts and figures that can be processed to produce
meaningful information
data compression - ✔✔ANSWER✔✔-the process of reducing the size of data to
save space or transmission time
data types - ✔✔ANSWER✔✔-categories of data that define what kind of value
can be stored, like integers, floats, and strings, and how it can be used
declaration - ✔✔ANSWER✔✔-a statement in programming that specifies the
name and type of a variable or function without assigning a value
digital data - ✔✔ANSWER✔✔-data represented using discrete binary values
(zeroes and ones)
floating point - ✔✔ANSWER✔✔-a way to represent real numbers that can
have fractional parts using a format that includes a base and an exponent
Huffman encoding - ✔✔ANSWER✔✔-a compression technique that uses
variable-length codes for data representation based on frequency of
occurrence
information - ✔✔ANSWER✔✔-data that have been processed or organized in
a meaningful way to be useful
integer - ✔✔ANSWER✔✔-a whole number
,keyword encoding - ✔✔ANSWER✔✔-a method of data compression that
replaces frequently occurring patterns with shorter codes
lossless - ✔✔ANSWER✔✔-a type of data compression where no information is
lost and the original data can be perfectly reconstructed
lossy - ✔✔ANSWER✔✔-a type of data compression that reduces file size by
permanently eliminating some information, which may affect quality
numeric - ✔✔ANSWER✔✔-any value that is a number
overflow - ✔✔ANSWER✔✔-a condition in which a calculation exceeds the
maximum value that can be represented within a given number of bits
pulse-code modulation (PCM) - ✔✔ANSWER✔✔-a method used to digitally
represent analog signals
radix point - ✔✔ANSWER✔✔-the decimal point in a number system that
indicates the separation between integer and fractional parts
real - ✔✔ANSWER✔✔-a data type representing numbers that can have
fractional parts, often called floating-point numbers
reclocking - ✔✔ANSWER✔✔-the process of refreshing the timing signals in
digital data to ensure accuracy and synchronization
, run-length encoding - ✔✔ANSWER✔✔-a simple compression technique that
replaces sequences of repeated characters with a single character and a count
scientific notation - ✔✔ANSWER✔✔-a method of representing very large or
very small numbers by using powers of 10
signed-magnitude representation - ✔✔ANSWER✔✔-a way of encoding
positive and negative numbers where one bit represents the sign and the
remaining bits represent the magnitude
string - ✔✔ANSWER✔✔-a sequence of characters treated as a single data
element and used for text manipulation
strong typing - ✔✔ANSWER✔✔-a feature in programming languages where
each variable is explicitly declared to be of a specific type, reducing errors
ten's complement - ✔✔ANSWER✔✔-a mathematical method for representing
negative numbers in a decimal system
Unicode - ✔✔ANSWER✔✔-a universal character set that includes characters
from virtually all writing systems, allowing for consistent encoding and
representation of text globally
alphanumeric values - ✔✔ANSWER✔✔-characters that include both letters (A-
Z) and numbers (0-9)
assignment operator - ✔✔ANSWER✔✔-a symbol used to assign a value to a
variable, typically =
EXAM 2025/2026 QUESTIONS AND CORRECT
ANSWERS
American Standard Code for Information Interchange (ASCII) -
✔✔ANSWER✔✔-a standard encoding system for text characters that uses
numeric values to represent letters, numbers, and symbols
analog data - ✔✔ANSWER✔✔-data represented in a continuous and variable
form
bandwidth - ✔✔ANSWER✔✔-the maximum rate of data transfer across a
network or communication channel, usually measured in bits per second
binary - ✔✔ANSWER✔✔-a numerical system that uses only two digits, zero
and one, to represent data in computing
Boolean expression - ✔✔ANSWER✔✔-a logical statement that can only be true
or false and uses operators like AND, OR, and NOT
character - ✔✔ANSWER✔✔-a single letter, digit, or symbol used in writing text
character set - ✔✔ANSWER✔✔-a collection of characters that a computer can
recognize and process, like ASCII or Unicode
compression ratio - ✔✔ANSWER✔✔-the ratio of the original data size to the
compressed data size, indicating how much the data has been reduced
,control structure - ✔✔ANSWER✔✔-constructs in programming that control
the flow of execution, such as loops and conditional statements
data - ✔✔ANSWER✔✔-raw facts and figures that can be processed to produce
meaningful information
data compression - ✔✔ANSWER✔✔-the process of reducing the size of data to
save space or transmission time
data types - ✔✔ANSWER✔✔-categories of data that define what kind of value
can be stored, like integers, floats, and strings, and how it can be used
declaration - ✔✔ANSWER✔✔-a statement in programming that specifies the
name and type of a variable or function without assigning a value
digital data - ✔✔ANSWER✔✔-data represented using discrete binary values
(zeroes and ones)
floating point - ✔✔ANSWER✔✔-a way to represent real numbers that can
have fractional parts using a format that includes a base and an exponent
Huffman encoding - ✔✔ANSWER✔✔-a compression technique that uses
variable-length codes for data representation based on frequency of
occurrence
information - ✔✔ANSWER✔✔-data that have been processed or organized in
a meaningful way to be useful
integer - ✔✔ANSWER✔✔-a whole number
,keyword encoding - ✔✔ANSWER✔✔-a method of data compression that
replaces frequently occurring patterns with shorter codes
lossless - ✔✔ANSWER✔✔-a type of data compression where no information is
lost and the original data can be perfectly reconstructed
lossy - ✔✔ANSWER✔✔-a type of data compression that reduces file size by
permanently eliminating some information, which may affect quality
numeric - ✔✔ANSWER✔✔-any value that is a number
overflow - ✔✔ANSWER✔✔-a condition in which a calculation exceeds the
maximum value that can be represented within a given number of bits
pulse-code modulation (PCM) - ✔✔ANSWER✔✔-a method used to digitally
represent analog signals
radix point - ✔✔ANSWER✔✔-the decimal point in a number system that
indicates the separation between integer and fractional parts
real - ✔✔ANSWER✔✔-a data type representing numbers that can have
fractional parts, often called floating-point numbers
reclocking - ✔✔ANSWER✔✔-the process of refreshing the timing signals in
digital data to ensure accuracy and synchronization
, run-length encoding - ✔✔ANSWER✔✔-a simple compression technique that
replaces sequences of repeated characters with a single character and a count
scientific notation - ✔✔ANSWER✔✔-a method of representing very large or
very small numbers by using powers of 10
signed-magnitude representation - ✔✔ANSWER✔✔-a way of encoding
positive and negative numbers where one bit represents the sign and the
remaining bits represent the magnitude
string - ✔✔ANSWER✔✔-a sequence of characters treated as a single data
element and used for text manipulation
strong typing - ✔✔ANSWER✔✔-a feature in programming languages where
each variable is explicitly declared to be of a specific type, reducing errors
ten's complement - ✔✔ANSWER✔✔-a mathematical method for representing
negative numbers in a decimal system
Unicode - ✔✔ANSWER✔✔-a universal character set that includes characters
from virtually all writing systems, allowing for consistent encoding and
representation of text globally
alphanumeric values - ✔✔ANSWER✔✔-characters that include both letters (A-
Z) and numbers (0-9)
assignment operator - ✔✔ANSWER✔✔-a symbol used to assign a value to a
variable, typically =
