Unit 1 Quiz: Multiple Choice Questions

Which computer system component is responsible for interpreting and executing commands from the computer's other hardware and software?

• a) CPU

• b) SSD

• c) HDD

• d) RAM

Answer explanation

The CPU (Central Processing Unit) is the primary component that interprets and executes commands from both hardware and software, making it essential for the computer's operation.

A client has complained about running slow, being unable to install programs, and Windows will no longer update. The client also cannot save any new files as it says the destination is full. What would be the best way for a technician to rectify this issue?

• Install faster RAM

• Install more RAM

• Install a larger hard disk

• Install a faster hard disk

Answer explanation

The client cannot save files due to a full destination, indicating a lack of storage space. Installing a larger hard disk will resolve this issue, allowing for program installations, updates, and file saving.

Convert this binary string to hexadecimal: 0100 1101 1011 1001

• 7AFB

• 4DB9

• DCB9

• DBC8

Answer explanation

To convert the binary string 0100 1101 1011 1001 to hexadecimal, group the bits into sets of four: 0100 (4), 1101 (D), 1011 (B), 1001 (9). Thus, the hexadecimal representation is 4DB9, which is the correct answer.

Convert this hexadecimal into binary: E9DB

• 1111 1000 1010 1110

• 1110 1001 1011 1011

• 1011 1000 1100 1010

• 1110 1000 1100 1011

Answer explanation

To convert E9DB to binary, convert each hex digit: E=1110, 9=1001, D=1101, B=1011. Combining these gives 1110 1001 1101 1011, which matches the correct answer 1110 1001 1011 1011.

How many usable hosts can be found on the following subnetwork: 192.168.1.0/27?

• 30

• 20

• 25

• 15

Answer explanation

The subnet mask /27 allows for 32 IP addresses (2^(32-27)). Subtracting 2 for the network and broadcast addresses leaves 30 usable hosts. Therefore, the correct answer is 30.

What IP class does the following address belong to: 128.1.1.1?

• Class A

• Class B

• Class C

• Class D

Answer explanation

The IP address 128.1.1.1 falls within the range of Class B addresses, which are from 128.0.0.0 to 191.255.255.255. Therefore, the correct answer is Class B.

Which cable would be best suited for a high EMI area?

• UTP

• STP

• Fibre

• Coaxial

Answer explanation

STP (Shielded Twisted Pair) is designed to reduce electromagnetic interference (EMI) by using shielding around the wires, making it the best choice for high EMI areas compared to UTP, Fibre, and Coaxial.

Which of the following cables are capable of supporting data rates up to 25 or 40 gigabits per second (Gbps) over short distances?

• Cat 5

• Cat 6

• Cat 7

• Cat 8

Answer explanation

Cat 8 cables are designed to support data rates of up to 25 or 40 Gbps over short distances, making them suitable for high-speed networking. In contrast, Cat 5, Cat 6, and Cat 7 do not support these high data rates.

Which of the following describes an FC fibre connector?

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Answer explanation

An FC (Ferrule Connector) fibre connector is known for its precision and low signal loss. It features a cylindrical ferrule that aligns the optical fibers, making it ideal for high-performance applications.

Which type of fibre optic connector is commonly used in high-vibration environments?

• Standard Connector

• Ferrule Core

• Bayonet Neill-Concelman

Answer explanation

The Ferrule Core connector is designed to withstand high-vibration environments due to its robust construction, ensuring stable connections. In contrast, Standard Connectors and Bayonet Neill-Concelman connectors are less suited for such conditions.