WGU D684 INTRODUCTION TO COMPUTER
SCIENCE COURSE OBJECTIVE ASSESSMENT (OA)
MOST TESTED AND HIGH YIELD QUESTIONS WITH
ANSWERS AND EXPLANATIONS | RATED GRADE A+
| GUARANTEED PASS
Question: What is analog data?
Answer: Data represented in a continuous and variable form.
Rationale: Analog data changes smoothly over a range of values rather than in
discrete steps, which distinguishes it from digital data.
Question: What is the 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.
Rationale: ASCII assigns specific numerical codes to characters so computers can
store and transmit text consistently.
Question: What is bandwidth?
Answer: The maximum rate of data transfer across a network or communication
channel, usually measured in bits per second.
Rationale: Bandwidth determines how much data can be transmitted over a
network in a given amount of time.
Question: What is binary?
Answer: A numerical system that uses only two digits, zero and one, to represent
data in computing.
Rationale: Computers operate using electrical states that correspond to 0 and 1,
making binary the fundamental language of computing.
,Question: What is a Boolean expression?
Answer: A logical statement that can only be true or false and uses operators like
AND, OR, and NOT.
Rationale: Boolean expressions are used in programming and digital logic to
control decision-making processes.
Question: What is a character?
Answer: A single letter, digit, or symbol used in writing text.
Rationale: Characters are the basic units of text data that computers store and
process.
Question: What is a character set?
Answer: A collection of characters that a computer can recognize and process, like
ASCII or Unicode.
Rationale: Character sets define how characters are represented digitally so that
systems can correctly display and interpret text.
Question: What is compression ratio?
Answer: The ratio of the original data size to the compressed data size, indicating
how much the data has been reduced.
Rationale: The compression ratio helps measure the effectiveness of a
compression technique.
Question: What is a control structure?
Answer: Constructs in programming that control the flow of execution, such as
loops and conditional statements.
Rationale: Control structures allow programs to make decisions and repeat
actions based on conditions.
Question: What is data?
Answer: Raw facts and figures that can be processed to produce meaningful
information.
Rationale: Data by itself has little meaning until it is organized or processed into
information.
,Question: What is data compression?
Answer: The process of reducing the size of data to save space or transmission
time.
Rationale: Compression makes storage and data transmission more efficient by
minimizing file size.
Question: What are 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.
Rationale: Data types ensure that data is stored and manipulated correctly in
programming.
Question: What is a declaration?
Answer: A statement in programming that specifies the name and type of a
variable or function without assigning a value.
Rationale: Declarations inform the program about the existence and type of
variables or functions before they are used.
Question: What is digital data?
Answer: Data represented using discrete binary values (zeroes and ones).
Rationale: Digital data is used by computers because it can be processed reliably
using binary logic.
Question: What is floating point?
Answer: A way to represent real numbers that can have fractional parts using a
format that includes a base and an exponent.
Rationale: Floating-point representation allows computers to store very large or
very small numbers with decimal components.
Question: What is Huffman encoding?
Answer: A compression technique that uses variable-length codes for data
representation based on frequency of occurrence.
Rationale: Frequently occurring data is given shorter codes, reducing the overall
size of the data.
, Question: What is information?
Answer: Data that have been processed or organized in a meaningful way to be
useful.
Rationale: When raw data is structured or analyzed, it becomes information that
can support decision-making.
Question: What is an integer?
Answer: A whole number.
Rationale: Integers represent numbers without fractional or decimal parts.
Question: What is keyword encoding?
Answer: A method of data compression that replaces frequently occurring
patterns with shorter codes.
Rationale: By substituting common patterns with shorter representations, the
overall data size is reduced.
Question: What is lossless compression?
Answer: A type of data compression where no information is lost and the original
data can be perfectly reconstructed.
Rationale: Lossless compression is used when maintaining the exact original data
is important.
Question: What is lossy compression?
Answer: A type of data compression that reduces file size by permanently
eliminating some information, which may affect quality.
Rationale: Lossy compression achieves higher compression ratios by discarding
less important data, often used for images, audio, and video.
Question: What is numeric?
Answer: Any value that is a number.
Rationale: Numeric values represent quantities and are used in calculations and
mathematical operations in programming.
Question: What is overflow?
Answer: A condition in which a calculation exceeds the maximum value that can
SCIENCE COURSE OBJECTIVE ASSESSMENT (OA)
MOST TESTED AND HIGH YIELD QUESTIONS WITH
ANSWERS AND EXPLANATIONS | RATED GRADE A+
| GUARANTEED PASS
Question: What is analog data?
Answer: Data represented in a continuous and variable form.
Rationale: Analog data changes smoothly over a range of values rather than in
discrete steps, which distinguishes it from digital data.
Question: What is the 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.
Rationale: ASCII assigns specific numerical codes to characters so computers can
store and transmit text consistently.
Question: What is bandwidth?
Answer: The maximum rate of data transfer across a network or communication
channel, usually measured in bits per second.
Rationale: Bandwidth determines how much data can be transmitted over a
network in a given amount of time.
Question: What is binary?
Answer: A numerical system that uses only two digits, zero and one, to represent
data in computing.
Rationale: Computers operate using electrical states that correspond to 0 and 1,
making binary the fundamental language of computing.
,Question: What is a Boolean expression?
Answer: A logical statement that can only be true or false and uses operators like
AND, OR, and NOT.
Rationale: Boolean expressions are used in programming and digital logic to
control decision-making processes.
Question: What is a character?
Answer: A single letter, digit, or symbol used in writing text.
Rationale: Characters are the basic units of text data that computers store and
process.
Question: What is a character set?
Answer: A collection of characters that a computer can recognize and process, like
ASCII or Unicode.
Rationale: Character sets define how characters are represented digitally so that
systems can correctly display and interpret text.
Question: What is compression ratio?
Answer: The ratio of the original data size to the compressed data size, indicating
how much the data has been reduced.
Rationale: The compression ratio helps measure the effectiveness of a
compression technique.
Question: What is a control structure?
Answer: Constructs in programming that control the flow of execution, such as
loops and conditional statements.
Rationale: Control structures allow programs to make decisions and repeat
actions based on conditions.
Question: What is data?
Answer: Raw facts and figures that can be processed to produce meaningful
information.
Rationale: Data by itself has little meaning until it is organized or processed into
information.
,Question: What is data compression?
Answer: The process of reducing the size of data to save space or transmission
time.
Rationale: Compression makes storage and data transmission more efficient by
minimizing file size.
Question: What are 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.
Rationale: Data types ensure that data is stored and manipulated correctly in
programming.
Question: What is a declaration?
Answer: A statement in programming that specifies the name and type of a
variable or function without assigning a value.
Rationale: Declarations inform the program about the existence and type of
variables or functions before they are used.
Question: What is digital data?
Answer: Data represented using discrete binary values (zeroes and ones).
Rationale: Digital data is used by computers because it can be processed reliably
using binary logic.
Question: What is floating point?
Answer: A way to represent real numbers that can have fractional parts using a
format that includes a base and an exponent.
Rationale: Floating-point representation allows computers to store very large or
very small numbers with decimal components.
Question: What is Huffman encoding?
Answer: A compression technique that uses variable-length codes for data
representation based on frequency of occurrence.
Rationale: Frequently occurring data is given shorter codes, reducing the overall
size of the data.
, Question: What is information?
Answer: Data that have been processed or organized in a meaningful way to be
useful.
Rationale: When raw data is structured or analyzed, it becomes information that
can support decision-making.
Question: What is an integer?
Answer: A whole number.
Rationale: Integers represent numbers without fractional or decimal parts.
Question: What is keyword encoding?
Answer: A method of data compression that replaces frequently occurring
patterns with shorter codes.
Rationale: By substituting common patterns with shorter representations, the
overall data size is reduced.
Question: What is lossless compression?
Answer: A type of data compression where no information is lost and the original
data can be perfectly reconstructed.
Rationale: Lossless compression is used when maintaining the exact original data
is important.
Question: What is lossy compression?
Answer: A type of data compression that reduces file size by permanently
eliminating some information, which may affect quality.
Rationale: Lossy compression achieves higher compression ratios by discarding
less important data, often used for images, audio, and video.
Question: What is numeric?
Answer: Any value that is a number.
Rationale: Numeric values represent quantities and are used in calculations and
mathematical operations in programming.
Question: What is overflow?
Answer: A condition in which a calculation exceeds the maximum value that can
