A Level Computer Science

Select three items which are resources shared on a computer network.

• Data

• Bridge

• Storage

• Internet

• Packets

Communication rules used by network devices is known as protocol.

• True

• False

Which of the following security concerns canbe addressed with the help of a digital certificate?

• Availability

• Confidentiality

• Authenticity

• Integrity

What is Packet Switching?

• Sending packets over different routes on the internet

• exchanging packets from one user to another

• stealing one packet and swapping another one to replace it

First Step of the FETCH

• The CPU reads the contents of the Program Counter to find the address of the next instruction to be fetched

• The address in the MAR is then located in RAM

• The contents of the RAM address are moved to the MDR

• The instruction in the MDR is copied to the CIR

CIR Stands for

• Current Instruction RAM

• Current Instruction Register

• CPU Information Register

• Combined Information Register

• Combined Instruction Register

The first step in the DECODE step is

• The contents of the CIR are divided into instruction and data

• The contents of the CIR are copied to the PC.

• The contents of the CIR are copied to the RAM.

• The contents of the CIR are copied to the ALU.

In the EXECUTE stage the result of a calculation is stored in the ..

• ALU

• MDR

• Control Bus

• Accumulator

• Operand

The PC contains

• Operand

• Address

• Operator

• Data

Holds the RAM address you want to read to or write from.

• MAR

• CIR

• MDR

• Accumulator