GCSE may 2022 OCR

What is the binary equivalent of the denary number 221?

• 11011101

• 10110110

• 11100110

• 10011100

What is the denary equivalent of the hexadecimal number 2F?

• 45

• 47

• 42

• 46

What is the hexadecimal equivalent of the binary number 10111000?

• B8

• E2

• A1

• 7C

How many unique values can be represented by 4 bits?

• 8

• 16

• 12

• 14

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

• 00010001

• 00001000

• 00010110

• 00001110

What is the function 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. Increments during each fetch-execute cycle.

• Manages the execution of programs and processes input/output requests.

Which CPU component or register stores the address of the data to be fetched from or the address where the data is to be stored?

• CU (Control Unit)

• MAR (Memory Address Register)

• PC (Program Counter)

• ALU (Arithmetic Logic Unit)

What is the primary function of the component that performs mathematical calculations and logical operations in a CPU?

• CU (Control Unit)

• MAR (Memory Address Register)

• PC (Program Counter)

• ALU (Arithmetic Logic Unit)

Why can the number of devices using a LAN at the same time affect the performance of the network?

• It can increase the network's speed.

• It can decrease the network's speed.

• It can increase the network's storage capacity.

• It does not affect the network's performance.

Identify one factor, other than the number of devices, that can affect the performance of a LAN.

• The color of the devices connected to the network.

• The type of activities being performed on the network.

• The brand of the devices connected to the network.

• The location of the library.