UNITS 1-4 A LEVEL IT

Unit 1: Data Processing and Information

1. What is the primary difference between data and information?

• • A) Data is raw facts without context.

• • B) Data is meaningful and processed.

• • C) Information has no context.

• • D) Information is raw facts.

Unit 1: Data Processing and Information

Which of the following affects the quality of information?

• • A) Relevance, accuracy, age, level of detail, and completeness.

• • B) Relevance, accuracy, and color.

• • C) Only accuracy and relevance.

• • D) None of the above.

Unit 1: Data Processing and Information

What is symmetric encryption?

• • A) Uses the same key for encryption and decryption.

• • B) Uses different keys for encryption and decryption.

• • C) Does not require a key.

• • D) None of the above.

Unit 2: Hardware and Software

4. What is a mainframe computer primarily used for?

• • A) Home computing

• • B) Gaming

• • C) Handling large-scale applications like census and transaction processing.

• • D) Mobile applications

Unit 2: Hardware and Software

Which of the following is a type of system software?

• • A) Word Processor

• • B) Web Browser

• • C) Photo Editor

• • D) Compiler

Unit 3: Monitoring and Control

7. Which sensor is used to measure atmospheric pressure in a weather station?

• • A) Light sensor

• • B) Sound sensor

• • C) Pressure sensor

• • D) Proximity sensor

• Unit 3: Monitoring and Control

• What is the importance of calibration in monitoring technologies?

• • A) To ensure sensors provide accurate readings.

• • B) To save energy.

• • D) None of the above.

• • D) To change the type of data collected.

Unit 3: Monitoring and Control

Which of the following is an example of a control technology system?

• • A) Central heating systems (Correct)

• • B) Spreadsheet software

• • C) Word processor

• • D) Web browseR

• Unit 4: Algorithms and Flowcharts

• What is the purpose of a flowchart in algorithms?

• • A) To visually represent the steps in an algorithm.

• • B) To execute the algorithm.

• • C) To write pseudocode.

• • D) None of the above.

Unit 4: Algorithms and Flowcharts

Which symbol in a flowchart represents a decision?

• • A) Diamond

• • B) Rectangle

• • C) Circle

• • D) Oval