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Questions and Answers
Which of the following best describes the primary function of data compression?
Which of the following best describes the primary function of data compression?
- To convert analog signals into digital signals.
- To organize raw facts and figures into meaningful information.
- To encrypt data for security purposes.
- To reduce the size of data for efficient storage or transmission. (correct)
In the context of data representation, what distinguishes 'analog data' from 'digital data'?
In the context of data representation, what distinguishes 'analog data' from 'digital data'?
- Analog data represents data in a continuous form, while digital data uses discrete values. (correct)
- Analog data is processed using ASCII, while digital data uses Unicode.
- Analog data uses binary values, while digital data uses continuous values.
- Analog data is compressed using lossless techniques, while digital data uses lossy techniques.
What is the significance of 'bandwidth' in the context of network communication?
What is the significance of 'bandwidth' in the context of network communication?
- It refers to the physical cables used to connect devices in a network.
- It represents the maximum rate of data transfer across a network channel. (correct)
- It defines the security protocols used to protect data transmitted over a network.
- It specifies the type of data that can be transmitted, such as text, images, or video.
Which of the following is a characteristic of 'lossy' data compression?
Which of the following is a characteristic of 'lossy' data compression?
How does 'Huffman encoding' achieve data compression?
How does 'Huffman encoding' achieve data compression?
What is the role of a 'control structure' in programming?
What is the role of a 'control structure' in programming?
What is the purpose of 'reclocking' in digital data transmission?
What is the purpose of 'reclocking' in digital data transmission?
Which of the following best describes a 'Boolean expression'?
Which of the following best describes a 'Boolean expression'?
How does 'run-length encoding' compress data?
How does 'run-length encoding' compress data?
What is the main advantage of using 'Unicode' over 'ASCII'?
What is the main advantage of using 'Unicode' over 'ASCII'?
Flashcards
Analog data
Analog data
Data represented in a continuous and variable form.
ASCII
ASCII
A standard encoding system for text characters using numeric values.
Bandwidth
Bandwidth
The maximum rate of data transfer across a network, measured in bits per second.
Binary
Binary
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Boolean expression
Boolean expression
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Character
Character
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Data
Data
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Data Compression
Data Compression
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Data types
Data types
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Digital data
Digital data
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Study Notes
- Analog data exists as continuously variable data.
- American Standard Code for Information Interchange (ASCII) serves as a standard encoding system utilizing numeric values for representing text characters.
- Bandwidth refers to the maximum data transfer rate across a communication channel, measured in bits per second.
- Binary is a numerical system using only two digits, zero and one, to represent data in computing.
- A Boolean expression is a logical statement, either true or false, employing operators like AND, OR, and NOT.
- A character is a single letter, digit, or symbol.
- A character set is a collection of characters a computer recognizes and processes (ASCII or Unicode).
- Compression ratio measures the reduction in data size, comparing original to compressed sizes.
- Control structures in programming manage execution flow via loops and conditional statements.
- Data is raw facts and figures.
- Data compression reduces data size for efficient storage or transmission.
- Data types are categories defining storable value types like integers, floats, and strings.
- A declaration in programming names a variable or function and type without assignment.
- Digital data is represented using discrete binary values (zeroes and ones).
- Floating point represents real numbers with fractional parts using a base and exponent format.
- Huffman encoding is a compression method using variable-length codes based on frequency of occurrence.
- Information is data processed and organized for utility.
- An integer is a whole number.
- Keyword encoding replaces frequent patterns with shorter codes for data compression.
- Lossless data compression reconstructs the original data perfectly.
- Lossy data compression reduces file size.
- Numeric refers to any value that is a number.
- Overflow happens when a calculation exceeds the maximum representable value for a given number of bits.
- Pulse-code modulation (PCM) digitally represents analog signals.
- Radix point is the decimal point that separates the integer from the fractional parts.
- Real data types includes numbers with fractional parts, like floating-point numbers.
- Reclocking maintains accuracy and synchronization by refreshing digital data timing signals.
- Run-length encoding compresses data by representing repeated character sequences.
- Scientific notation represents very large or small numbers using powers of 10.
- Signed-magnitude representation encodes positive/negative numbers.
- A string is a sequence of characters treated as a single data element.
- Strong typing is a feature in programming languages - each variable is explicitly declared to be of a specific type, reducing errors.
- Ten's complement is a mathematical method for representing negative numbers in a decimal system.
- Unicode is a character set, allowing for consistent encoding and representation of text globally.
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