Explanation

Clock speed measures how fast a computer's processor can execute instructions.

It is expressed in Gigahertz (GHz).

1 GHz equals 1 billion cycles per second, indicating the processor’s speed.

Explanation

Process P2 starts at time 16 and finishes at time 23.

Finish time is the time when the process completes execution in FCFS.

Explanation

Explanation

Supercomputers are the most powerful computers, capable of performing trillions of calculations per second.

They are used in research laboratories for complex tasks like climate modeling, simulations, and scientific research.

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.