CIE iGCSE Computer Science Paper 1 Revision

What is the binary representation of the decimal number 25?

• 11100

• 10011

• 11001

• 10101

Explain the difference between serial and parallel data transmission.

• In serial data transmission, data is sent one bit at a time over a single channel, whereas in parallel data transmission, multiple bits are sent simultaneously over multiple channels.

• Serial data transmission is faster than parallel data transmission.

• In serial data transmission, data is sent over multiple channels, whereas in parallel data transmission, data is sent over a single channel.

• Parallel data transmission is more error-prone than serial data transmission.

Name three input devices commonly found in a computer system.

• Monitor

• Keyboard, Mouse, Microphone

• Printer

• Speaker

What is the purpose of an operating system?

• To make coffee

• To manage computer resources, provide a user interface, and facilitate communication between software and hardware.

• To bake cookies

• To play video games

How does a router function in the context of the Internet?

• A router functions by sending data packets to all available networks simultaneously.

• A router functions by randomly selecting a path for data packets to reach their destination network.

• A router functions by receiving data packets and determining the best path for them to reach their destination network.

• A router functions by storing all data packets indefinitely without forwarding them.

What are some examples of automated technologies in everyday life?

• automated traffic lights

• self-driving cars

• self-checkout machines, automatic doors, smart thermostats, automated email responses

• robotic vacuum cleaners

Explain the concept of virtual reality and its applications.

• Virtual reality is a form of augmented reality

• Virtual reality is only used for entertainment purposes

• Virtual reality does not require any special equipment

• Virtual reality is a computer-generated simulation of a three-dimensional environment that can be interacted with in a seemingly real or physical way. It immerses users in an artificial world, typically through the use of special electronic equipment such as a VR headset. Applications of virtual reality include gaming, training simulations, medical training, architectural design, and virtual tours.

What is the difference between machine learning and artificial intelligence?

• Machine learning is more advanced than artificial intelligence.

• Machine learning is a subset of artificial intelligence.

• Machine learning and artificial intelligence are the same thing.

• Artificial intelligence is a subset of machine learning.

Describe the role of TCP/IP in data transmission over the Internet.

• TCP/IP only handles data encryption in data transmission over the Internet.

• TCP/IP is responsible for physical data storage in data transmission over the Internet.

• TCP/IP ensures reliable and ordered delivery of data packets while handling addressing and routing.

• TCP/IP focuses on compressing data packets in data transmission over the Internet.

How does cloud computing impact the storage and processing of data?

• Cloud computing has no impact on data storage and processing

• Cloud computing slows down data storage and processing

• Cloud computing only impacts data storage, not processing

• Cloud computing impacts the storage and processing of data by providing scalable and flexible solutions through remote servers accessed over the internet.