WGU D684 Introduction to Computer Science Test
Bank Questions and Answers (2026/2027) | Review
Pack | Exam Practice | A+
• bandwidth -✓✓the maximum rate of data transfer across a network or
communication channel, usually measured in bits per second
• binary -✓✓a numerical system that uses only two digits, zero and one, to
represent data in computing
• Boolean expression -✓✓a logical statement that can only be true or false
and uses operators like AND, OR, and NOT
• character -✓✓a single letter, digit, or symbol used in writing text
• character set -✓✓a collection of characters that a computer can
recognize and process, like ASCII or Unicode
• compression ratio -✓✓the ratio of the original data size to the
compressed data size, indicating how much the data has been reduced
• control structure -✓✓constructs in programming that control the flow of
execution, such as loops and conditional statements
• data -✓✓raw facts and figures that can be processed to produce
meaningful information
• data compression -✓✓the process of reducing the size of data to save
space or transmission time
• data types -✓✓categories of data that define what kind of value can be
stored, like integers, floats, and strings, and how it can be used
• declaration -✓✓a statement in programming that specifies the name and
type of a variable or function without assigning a value
,• digital data -✓✓data represented using discrete binary values (zeroes
and ones)
• floating point -✓✓a way to represent real numbers that can have
fractional parts using a format that includes a base and an exponent
• Huffman encoding -✓✓a compression technique that uses variable-length
codes for data representation based on frequency of occurrence
• information -✓✓data that have been processed or organized in a
meaningful way to be useful
• integer -✓✓a whole number
• keyword encoding -✓✓a method of data compression that replaces
frequently occurring patterns with shorter codes
• lossless -✓✓a type of data compression where no information is lost and
the original data can be perfectly reconstructed
• lossy -✓✓a type of data compression that reduces file size by
permanently eliminating some information, which may affect quality
• numeric -✓✓any value that is a number
• overflow -✓✓a condition in which a calculation exceeds the maximum
value that can be represented within a given number of bits
• pulse-code modulation (PCM) -✓✓a method used to digitally represent
analog signals
• radix point -✓✓the decimal point in a number system that indicates the
separation between integer and fractional parts
• real -✓✓a data type representing numbers that can have fractional parts,
often called floating-point numbers
, • reclocking -✓✓the process of refreshing the timing signals in digital data
to ensure accuracy and synchronization
• run-length encoding -✓✓a simple compression technique that replaces
sequences of repeated characters with a single character and a count
• scientific notation -✓✓a method of representing very large or very small
numbers by using powers of 10
• signed-magnitude representation -✓✓a way of encoding positive and
negative numbers where one bit represents the sign and the remaining bits
represent the magnitude
• string -✓✓a sequence of characters treated as a single data element and
used for text manipulation
• strong typing -✓✓a feature in programming languages where each
variable is explicitly declared to be of a specific type, reducing errors
• ten's complement -✓✓a mathematical method for representing negative
numbers in a decimal system
• Unicode -✓✓a universal character set that includes characters from
virtually all writing systems, allowing for consistent encoding and
representation of text globally
• alphanumeric values -✓✓characters that include both letters (A-Z) and
numbers (0-9)
• assignment operator -✓✓a symbol used to assign a value to a variable,
typically =
• assignment statement -✓✓a line of code that assigns a value to a
variable, like x = 5
• binary operator -✓✓an operator that takes two operands, such as +, -, *,
and /
Bank Questions and Answers (2026/2027) | Review
Pack | Exam Practice | A+
• bandwidth -✓✓the maximum rate of data transfer across a network or
communication channel, usually measured in bits per second
• binary -✓✓a numerical system that uses only two digits, zero and one, to
represent data in computing
• Boolean expression -✓✓a logical statement that can only be true or false
and uses operators like AND, OR, and NOT
• character -✓✓a single letter, digit, or symbol used in writing text
• character set -✓✓a collection of characters that a computer can
recognize and process, like ASCII or Unicode
• compression ratio -✓✓the ratio of the original data size to the
compressed data size, indicating how much the data has been reduced
• control structure -✓✓constructs in programming that control the flow of
execution, such as loops and conditional statements
• data -✓✓raw facts and figures that can be processed to produce
meaningful information
• data compression -✓✓the process of reducing the size of data to save
space or transmission time
• data types -✓✓categories of data that define what kind of value can be
stored, like integers, floats, and strings, and how it can be used
• declaration -✓✓a statement in programming that specifies the name and
type of a variable or function without assigning a value
,• digital data -✓✓data represented using discrete binary values (zeroes
and ones)
• floating point -✓✓a way to represent real numbers that can have
fractional parts using a format that includes a base and an exponent
• Huffman encoding -✓✓a compression technique that uses variable-length
codes for data representation based on frequency of occurrence
• information -✓✓data that have been processed or organized in a
meaningful way to be useful
• integer -✓✓a whole number
• keyword encoding -✓✓a method of data compression that replaces
frequently occurring patterns with shorter codes
• lossless -✓✓a type of data compression where no information is lost and
the original data can be perfectly reconstructed
• lossy -✓✓a type of data compression that reduces file size by
permanently eliminating some information, which may affect quality
• numeric -✓✓any value that is a number
• overflow -✓✓a condition in which a calculation exceeds the maximum
value that can be represented within a given number of bits
• pulse-code modulation (PCM) -✓✓a method used to digitally represent
analog signals
• radix point -✓✓the decimal point in a number system that indicates the
separation between integer and fractional parts
• real -✓✓a data type representing numbers that can have fractional parts,
often called floating-point numbers
, • reclocking -✓✓the process of refreshing the timing signals in digital data
to ensure accuracy and synchronization
• run-length encoding -✓✓a simple compression technique that replaces
sequences of repeated characters with a single character and a count
• scientific notation -✓✓a method of representing very large or very small
numbers by using powers of 10
• signed-magnitude representation -✓✓a way of encoding positive and
negative numbers where one bit represents the sign and the remaining bits
represent the magnitude
• string -✓✓a sequence of characters treated as a single data element and
used for text manipulation
• strong typing -✓✓a feature in programming languages where each
variable is explicitly declared to be of a specific type, reducing errors
• ten's complement -✓✓a mathematical method for representing negative
numbers in a decimal system
• Unicode -✓✓a universal character set that includes characters from
virtually all writing systems, allowing for consistent encoding and
representation of text globally
• alphanumeric values -✓✓characters that include both letters (A-Z) and
numbers (0-9)
• assignment operator -✓✓a symbol used to assign a value to a variable,
typically =
• assignment statement -✓✓a line of code that assigns a value to a
variable, like x = 5
• binary operator -✓✓an operator that takes two operands, such as +, -, *,
and /
