Y12IPT 9.3.4 PostQuiz

Which device is commonly used for collecting voice messages in a communication system?

• Printer

• Phone with voice mail

• Keyboard

• Mouse

EFTPOS terminals are used as a collection device in which type of system?

• Inventory management

• Electronic banking

• Online shopping

• Email communication

What is the process of converting analog signals to digital signals known as?

• Multiplexing

• Encoding

• Filtering

• Amplifying

Which of the following is NOT a step in the processing of data in communication systems?

• Routing

• Encryption

• Indexing

• Formation of data packets

In digital communication, what is the purpose of encryption?

• Increase the speed of data transmission

• Secure data from unauthorized access

• Convert analog signals to digital

• Compress data packets for faster transmission

Which error checking method adds a single bit to data for parity?

• Check sum

• Cyclic redundancy check (CRC)

• Parity bit check

• Encoding

The formation of data packets is crucial for which of the following processes?

EFTPOS terminals serve as what type of device in electronic banking systems?

• Input

• Output

• Display

• Storage

Decoding is the process of converting which types of signals into analog?

• Digital signals into analog

• Analog signals into digital

• Digital signals into more complex digital signals

• Analog signals into more complex analog signals

What is a cyclic redundancy check (CRC) primarily used for in data communication?

• Encrypting data

• Detecting errors in data

• Compressing data packets

• Decoding digital signals