AP Computer Science Principles Unit 1 Review

What is digital information?

• Data stored or transmitted in a digital format

• Data stored or transmitted in a handwritten format

• Data stored or transmitted in an analog format

• Information stored or transmitted in a physical format

What are the two states that digital information can be represented as?

• True and False

• Yes and No

• 0 and 1

• A and B

What is a bit?

• A small insect

• A type of drill bit

• A unit of measurement for time

• The basic unit of information in computing and digital communications.

What is a byte?

• A byte is a unit of digital information that consists of 8 bits.

• A byte is a unit of digital information that consists of 32 bits.

• A byte is a unit of digital information that consists of 16 bits.

• A byte is a unit of digital information that consists of 4 bits.

What is the binary number system?

• A number system that uses only three digits, 0, 1, and 2, to represent numbers.

• A number system that uses only four digits, 0, 1, 2, and 3, to represent numbers.

• A number system that uses only two digits, 0 and 1, to represent numbers.

• A number system that uses only five digits, 0, 1, 2, 3, and 4, to represent numbers.

What is ASCII?

• American Standard Code for Information Interface

• American Standard Code for Information Exchange

• American Standard Code for Information Integration

• American Standard Code for Information Interchange

What is Unicode?

• Unicode is a universal character encoding standard.

• Unicode is a programming language.

• Unicode is a type of computer virus.

• Unicode is a form of encryption.

What is the difference between lossless and lossy compression?

• Lossless compression achieves higher compression ratios than lossy compression by sacrificing some data.

• Lossless compression and lossy compression both sacrifice some data to achieve higher compression ratios.

• Lossless compression preserves all data, while lossy compression sacrifices some data to achieve higher compression ratios.

• Lossless compression sacrifices some data to achieve higher compression ratios, while lossy compression preserves all data.

What is metadata?

• Data that is not important

• Data that is encrypted

• Data that provides information about other data

• Data that is stored in the cloud

What is data integrity?

• Data integrity is the process of data collection

• Data integrity refers to the security of data

• Accuracy, consistency, and reliability of data

• Data integrity is the speed at which data is processed