COMPUTER ORGANISATION AND INSTRUCTIONS UNIT 1

Which of the following logic gates outputs true only when both inputs are true?

• OR

• AND

• NOT

• XOR

A flip-flop is used in which type of circuit?

• Combinational

• Digital

• Sequential

• Analog

Which Boolean identity is represented by A + AB = A?

• Distributive

• Absorption

• Associative

• Demorgan’s

What is the output of a NAND gate if both inputs are 1?

• 0

• 1

• Undefined

• Depends on input

Which unit controls the operation of all parts of the computer?

• ALU

• Memory

• Control Unit

• I/O Unit

The ALU is responsible for:

• Data storage

• Logical and arithmetic operations

• Input processing

• Instruction decoding

Which component directly interacts with the CPU?

• Hard Disk

• RAM

• Monitor

• Mouse

The set of instructions that a CPU can execute is called:

• Register set

• Opcode

• Instruction Set Architecture

• RTL

What is the first step of the instruction execution cycle?

• Decode

• Execute

• Fetch

• Write-back

A register that holds the address of the next instruction to be executed is:

• MAR

• PC

• IR

• ACC