Cambridge Nationals in IT J836

What is the purpose of data representation in IT?

• Data representation in IT is designed to slow down computer processing

• The purpose of data representation in IT is to make data harder to interpret

• The purpose of data representation in IT is to convert data into a format that can be easily interpreted, stored, and manipulated by computers.

• Data representation in IT is used to create confusion among users

Explain the difference between analog and digital data representation.

• Analog data is stored in cloud servers, while digital data is stored locally.

• Analog data is discrete and represented by binary numbers, while digital data is continuous.

• Analog data is represented by letters, while digital data is represented by numbers.

• Analog data is continuous and represented by physical quantities like voltage or pressure, while digital data is discrete and represented by binary numbers.

What are the main components of a computer network?

• Data, files, folders, documents, spreadsheets

• Computers, printers, keyboards, monitors, mice

• Nodes, communication channels, network interfaces, protocols, routers/switches

• Servers, cables, software, firewalls, modems

What is a firewall and how does it contribute to cyber security?

• A firewall is a type of antivirus software that protects against malware.

• A firewall contributes to cybersecurity by monitoring and filtering network traffic to prevent unauthorized access and protect against cyber threats.

• A firewall is a software tool that enhances the speed of internet connections.

• A firewall is a physical barrier that prevents hackers from physically accessing a network.

List three examples of hardware components found in a computer system.

• Solid State Drive (SSD)

• 1. Central Processing Unit (CPU), 2. Random Access Memory (RAM), 3. Hard Disk Drive (HDD)

• Graphics Processing Unit (GPU)

• Motherboard

Describe the role of an operating system in software development.

• The operating system has no impact on software development

• The role of an operating system in software development is to manage resources, provide essential services, and act as an interface between hardware and software.

• An operating system is solely responsible for software testing

• Operating systems are only used for hardware management

What is the difference between RAM and ROM?

• RAM is used for permanent storage while ROM is used for temporary storage

• RAM is volatile memory used for temporary storage while ROM is non-volatile memory used for permanent storage.

• RAM and ROM are both volatile memory

• RAM and ROM are interchangeable terms

Explain the concept of encryption in the context of cyber security.

• Encryption involves sharing sensitive information openly without any protection.

• Encryption is a method used to slow down data transmission.

• Encryption is the process of converting data into plain text for easy access.

• Encryption is the process of converting data into a code to prevent unauthorized access.

What is the function of a CPU in a computer system?

• Executes instructions, performs calculations, and manages data flow within the system.

• Stores data and programs

• Regulates internet connectivity

• Manages the monitor display

Discuss the importance of testing in software development.

• Testing can be skipped to speed up the development process

• Testing is not necessary in software development

• Testing is important in software development to identify bugs, ensure requirements are met, improve quality, and reduce risks of failure.

• Testing only consumes time and resources without adding value