Computer Architecture Quiz

What is an operand in a computer instruction?

• The operation to be performed

• The data or location used in an instruction

• A special-purpose register

• The program counter

Which of the following is a general-purpose register in x86 architecture?

• PC

• SP

• AX

• IR

What is the role of the Program Counter (PC)?

• Holds the address of the next instruction to be executed

• Stores the current instruction

• Points to the top of the stack

• Holds status flags

Which type of operand is directly specified within the instruction?

• Register operand

• Immediate operand

• Memory operand

• I/O operand

In the instruction MOV AX, [1234H], what type of operand is used?

• Register operand

• Immediate operand

• Memory operand

• I/O operand

Which addressing mode uses a constant value within the instruction?

• Direct addressing

• Immediate addressing

• Indexed addressing

• Indirect addressing

What is an advantage of immediate addressing?

• Large range of values

• Requires additional memory access

• Simple and fast execution

• Involves pointer operations

Which addressing mode directly specifies the memory address in the instruction?

• Register addressing

• Indirect addressing

• Direct addressing

• Indexed addressing

The instruction MOV R1, [R2] uses which addressing mode?

• Immediate addressing

• Indirect addressing

• Indexed addressing

• Base-offset addressing

What is a disadvantage of indirect addressing?

• Additional memory access required

• Hardcoded memory locations

• Cannot be used for pointers

• No flexibility