Paper 1 mix Computer science

What is the binary equivalent of the decimal number 221?

• 11011101

• 10111011

• 11100110

• 10011011

Convert the hexadecimal number 2F to its decimal equivalent.

• 47

• 52

• 45

• 42

What is the hexadecimal representation of the binary number 10111000?

• B8

• E2

• A9

• C4

How many unique values can be represented by 4 bits?

• 8

• 16

• 12

• 10

What is the result of performing a binary shift of 3 places to the right on the binary number 10001110?

• 00010001

• 00001000

• 00010000

• 00011000

What is the role of the Control Unit (CU) in a CPU?

• Performs mathematical calculations and logical operations.

• Stores the address of the data to be fetched from or the address where the data is to be stored.

• Stores the address of the next instruction to be fetched from memory.

• Manages the input and output devices.

Which CPU component or register performs mathematical calculations and logical operations?

• Arithmetic Logic Unit (ALU)

• Control Unit (CU)

• Memory Address Register (MAR)

• Program Counter (PC)

Which component is responsible for storing the address of the data to be fetched from or the address where the data is to be stored?

• Control Unit (CU)

• Memory Data Register (MDR)

• Arithmetic Logic Unit (ALU)

• Program Counter (PC)

What allows a library's LAN to support both wired and wireless device connections?

• Router only

• Wired and wireless network adapters

• Wireless access points only

• Domain Name Server

Why might the performance of a library's LAN decrease when many devices are connected at the same time?

• Decrease in available bandwidth per device

• Increase in the speed of the internet connection

• Improved efficiency of the network

• Less interference from external sources