Computer Science Systems & Networking

Question 1

What is the primary function of an operating system?

Accepted Answer

To manage hardware and software resources

Answer

The operating system (OS) is the core software that manages all the hardware and software resources of a computer. It acts as an intermediary between applications and hardware, handling tasks such as memory management, process scheduling, file system operations, and input/output. Without an OS, applications cannot run, and users cannot interact with the computer.

Question 2

Which network topology connects all devices to a central hub?

Accepted Answer

Star topology

Answer

In a star network topology, all network devices are connected individually to a central hub, switch, or server. This central device acts as a conduit for all data traffic between the connected nodes. While it offers easy fault isolation and management, a failure of the central hub can bring down the entire network.

Question 3

Which protocol is commonly used for secure communication over the internet?

Accepted Answer

HTTPS

Answer

HTTPS (Hypertext Transfer Protocol Secure) is an extension of HTTP that adds a layer of security for communication over a computer network. It encrypts the data exchanged between a user's browser and a website, protecting sensitive information from eavesdropping and tampering. This security is achieved through the use of SSL/TLS protocols, ensuring data integrity and confidentiality.

Question 4

What does DHCP stand for, and what is its purpose?

Accepted Answer

Dynamic Host Configuration Protocol

Answer

DHCP stands for Dynamic Host Configuration Protocol. Its primary purpose is to automatically assign IP addresses and other network configuration parameters to devices connected to a network. This automation simplifies network administration by eliminating the need for manual IP address configuration, ensuring efficient and error-free network setup for new devices.

Question 5

Which layer of the OSI model is responsible for routing and forwarding data?

Accepted Answer

Network layer

Answer

The Network layer (Layer 3) of the OSI model is responsible for logical addressing and routing data packets across different networks. It determines the best path for data to travel from the source to the destination, using IP addresses for identification. Routers operate at this layer to forward packets between networks.

(CS) Computer Science Practice Test

(CS) Computer Science Practice Test

Computer Science Systems & Networking