Exploring Addressing Modes

What is the immediate addressing mode?

• The operand is fetched from memory using an address.

• The operand is calculated at runtime.

• The operand is directly specified in the instruction.

• The operand is stored in a register.

How does direct addressing mode work?

• The instruction uses a register to hold the operand's address.

• The operand's address is calculated at runtime.

• In direct addressing mode, the operand's address is given explicitly in the instruction.

• The operand is always stored in the accumulator.

Explain the concept of indirect addressing mode.

• In indirect addressing mode, the effective address is calculated using arithmetic operations on the operand.

• In indirect addressing mode, the operand is accessed directly using its address.

• In indirect addressing mode, the effective address of the operand is determined by a pointer stored in a register or memory location.

• Indirect addressing mode requires the use of a fixed memory address for all operations.

What is register addressing mode and its significance?

• Register addressing mode uses memory addresses for data access.

• Register addressing mode is slower than direct memory access.

• Register addressing mode is only applicable in 32-bit architectures.

• Register addressing mode allows direct access to CPU registers for faster data processing.

Define indexed addressing mode and its use cases.

• Indexed addressing mode allows efficient access to data structures by combining a constant offset with an index register.

• Indexed addressing mode does not support data structures like arrays or tables.

• Indexed addressing mode uses only a single register for data access.

• Indexed addressing mode is primarily used for arithmetic operations.

Which of the following is the indirect addressing mode?

• move R0,SUM

• Add (R2), R0

• Add #4, R2

• none of the given options

What are the advantages of using immediate addressing mode?

• Faster execution and simpler instruction decoding.

• Slower execution and more complex addressing modes.

• Increased memory usage and complex instruction decoding.

• Limited compatibility with modern processors.

How does indirect addressing differ from direct addressing?

• Indirect addressing uses a reference to access data, while direct addressing specifies the data location directly.

• Indirect addressing specifies the data location directly, while direct addressing uses a reference to access data.

• Direct addressing uses a reference to access data, while indirect addressing specifies the data location directly.

• Both indirect and direct addressing use references to access data.

What role do registers play in register addressing mode?

• Registers are used to manage memory allocation in the system.

• Registers are primarily responsible for input/output operations.

• Registers store data permanently for long-term use.

• Registers provide fast access to operands directly within the CPU, enhancing execution speed in register addressing mode.

Can you provide an example of indexed addressing mode in action?

• An example is accessing the 5th element of an array where the base address is in R1 and the index (4) is in R2: Effective Address = R1 + R2 (where R2 = 4).

• Accessing a single variable directly without any index: Effective Address = R1.

• Using a constant value to access the 10th element of an array: Effective Address = R1 + 10.

• Accessing the 3rd element of an array using R1 as the base and R2 as 2: Effective Address = R1 + R2 (where R2 = 2).