Which type of addressing directly uses the data in the address field without modification?

Which type of addressing directly uses the data in the address field without modification?

• A. Direct Addressing
• B. Indirect Addressing
• C. Indexed Addressing
• D. Immediate Addressing

Answer: (A)

The correct answer is direct addressing, where the address field in the instruction contains the actual address of the operand in memory. This means that the value in the address field is used directly to access the operand without any further calculations or modifications. Direct addressing simplifies programming and access because the programmer deals directly with the memory address where the data is stored. In this addressing mode, the operation's efficiency is typically higher, as it involves a straightforward access to memory, which can result in faster execution times. In contrast, indirect addressing involves a pointer or reference stored in the address field that must be resolved to find the actual operand's location. Similarly, indexed addressing uses a base address and an index to compute the effective address rather than using the address field directly. Immediate addressing, on the other hand, does not reference a memory address but instead uses a constant value specified in the instruction itself. Thus, direct addressing provides a clear and efficient method for accessing data in memory.

The correct answer is direct addressing, where the address field in the instruction contains the actual address of the operand in memory. This means that the value in the address field is used directly to access the operand without any further calculations or modifications. Direct addressing simplifies programming and access because the programmer deals directly with the memory address where the data is stored.

In this addressing mode, the operation's efficiency is typically higher, as it involves a straightforward access to memory, which can result in faster execution times. In contrast, indirect addressing involves a pointer or reference stored in the address field that must be resolved to find the actual operand's location. Similarly, indexed addressing uses a base address and an index to compute the effective address rather than using the address field directly. Immediate addressing, on the other hand, does not reference a memory address but instead uses a constant value specified in the instruction itself. Thus, direct addressing provides a clear and efficient method for accessing data in memory.