What are the four basic functions identified in a general computer system?

• Input, process, output, and storage

• Input, calculation, deletion, and transfer

• Input, transmission, encryption, and backup

• Input, analysis, networking, and security

In a general computer system, what is the function of 'Input'?

• External data is being entered into the system

• The system processes the data internally

• The system displays information to the user

• The system stores data for future use

In a general computer system, what is the function of 'Process'?

• An action is performed on data

• It stores data permanently

• It displays output to the user

• It connects to the internet

In a general computer system, what is the function of 'Output'?

• Giving out the information that was in the system. This can be in a printed, on screen or electronic format.

• Storing data permanently for future use.

• Processing the input data to generate results.

• Receiving data from the user or another system.

In a general computer system, what is the function of 'Storage'?

• Storing the data and information in the system. It may be the data that has been input, required during processing or results of processing.

• Performing arithmetic and logical operations on data.

• Controlling the flow of data between input and output devices.

• Displaying the processed information to the user.

Refer to the diagram showing the general model of a computer system. Which of the following is NOT one of the four basic functions?

• Input

• Process

• Output

• Transmission

Using a smart device to type and post a message on social media can be related to which of the following main steps in a general model of a computer?

• Input, Processing, Output, Storage

• Only Output and Storage

• Only Input and Output

• Only Processing and Output

What is the main function of a barcode reader?

• A barcode reader reads a set of parallel lines of differing thicknesses which represents a number.

• A barcode reader prints barcodes on products for identification.

• A barcode reader stores product information in a database.

• A barcode reader generates random numbers for inventory control.

Where are barcodes commonly used?

• Barcodes are used in supermarkets, library systems, luggage handling systems at airports, and stock control systems at warehouses.

• Barcodes are only used in ancient manuscripts for decoration.

• Barcodes are mainly used in outer space missions for communication.

• Barcodes are exclusively used in underwater archaeology.

What does OCR stand for and what is its use?

• OCR stands for Optical Character Reader. It is useful to convert text from paper to an electronic format that can be edited.

• OCR stands for Optical Code Reader. It is used to scan barcodes only.

• OCR stands for Online Character Recognition. It is used for voice recognition.

• OCR stands for Optical Character Recorder. It is used to record audio files.