Explanation

In databases, semantic description defines what kind of data an attribute should store.

Storing "Physics" as an employee name violates the expected semantic meaning of a name (e.g., "John", "Ali").

Explanation

In Star Topology, each device is connected independently to a central hub, so failure of one device doesn’t affect the others.

This makes the network more reliable and easier to manage compared to other topologies.

Explanation

The power supply unit (PSU) connects to the motherboard and provides power to various components such as the CPU, RAM, and other peripherals.

It converts AC power from the mains to DC power, which is then distributed to the different parts of the computer.

Explanation

In database lingo, these columns are called attributes.

A database attribute is a column name and the content of the fields under it in a table.

while 

Each row in a data set (called a tuple)

Explanation

Explanation

These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter.

Control keys. 

Function keys. 

Navigation keys. 

Numeric keypad.

Explanation

Assembly language is a low-level language that uses mnemonics to represent machine-level instructions.

It is hardware-specific and closer to binary code, offering more control over hardware.

Explanation

During booting, the operating system is loaded into RAM from the hard drive.

RAM (Random Access Memory) allows the OS to run and manage tasks efficiently while the computer is on.

Explanation

In a Bus topology, all network components are connected to a single central cable (the bus).

Data travels in both directions along the cable, and each device taps into it to receive data.

Explanation

Phishing is a cyber-attack technique where fake emails or websites are used to trick users into giving personal information.

It often targets passwords, credit card numbers, and login details by pretending to be legitimate sources.