AP CSP Unit 2

Which data compression technique provides the most compression?

• Lossy
• Lossless
• Filtering
• Classification

Which of the following best describes abstraction?

• Adding complexity so the concept can apply to more uses
• Simplifying complexity to make the concept more general
• Combining procedures to make a new one
• A set of instructions to do a task

Why is cleaning data important?

• It ensures incomplete data does not hide or skew results
• It removes bad data
• It repairs incomplete data
• All of the above

If analyzing data indicates a company should only hire people with a college degree because they stay with the company longer, what is this a potential indication of?

• Good data management practices leading to good hiring practices
• Frequency analysis to identify commonalities in the data
• Bias in collecting the data
• Data assessment and inquiry of hiring practices

What is one way in which number systems are abstract?

• The same amount can be represented by different number representations
• A number can only be represented by one number system
• Symbols can not be used to add, subtract, multiply, or divide them in their abstract form
• They use constraints

Why is analyzing data with computers important?

• To identify patterns that humans cannot see
• To increase the viability of server farms
• To verify existing solutions to problems
• To test due diligence

What is the number system used by computers?

• Base 10 (decimal)
• Base 8 (Octal)
• Base 2 (Binary)
• Base 16 (Hexidecimal)

When does an overflow error occur?

• When the computer runs of memory to store program instructions
• When the flow of binary digits reaches a broken pathway and cannot arrive at its destination
• When an integer requires more bits to represent it than the programming language provides
• When the numerator in a calculation is larger than the denominator

What is information about the author of a document considered to be?

• Metadata
• Content
• Context
• Mididata

What is the amount of data compression an algorithm can produce reliant upon?

• No repeating parts of the file being compressed
• Several patterns in the data
• A large file size
• A small file size