The addressing mode which makes use of in-direction pointers is
|A. Indirect addressing mode|
B. Index addressing mode
C. Relative addressing mode
D. Offset addressing mode
The Correct Answer Is:
- A. Indirect addressing mode
When using indirect addressing mode, the memory location to be accessed is stored in a register or memory location, instead of being specified directly in the instruction. There is a pointer or indirect address in the instruction that contains the actual memory address. Unlike direct addressing, where the memory address is fixed, dynamic addressing allows for more flexibility when accessing memory.
- During computer programming and architecture, indirect addressing mode is used to address memory. Access to memory is made more flexible with this form of memory addressing.
- The indirect addressing mode refers to a memory addressing mode where the memory location to be accessed is stored in a register or memory location and is not explicitly specified in the instruction.
- There’s an indirect address called a pointer in the instruction, which refers to the actual memory address to be accessed. Pointers can be stored in registers or in memory, and they can also be dynamically changed.
- Direct addressing provides a fixed address for memory access, while indirect addressing provides greater flexibility. During runtime, the memory location to be accessed can be changed, allowing for a more dynamic reading from memory.
- A dynamic data structure such as a linked list or tree whose memory location changes during runtime often uses indirect addressing mode.
- A novice programmer may find it challenging and error-prone to manipulate pointers in indirect addressing mode. The tool offers a lot of control over memory access, though, so it is a powerful tool for experienced programmers.
- It may impact performance if indirect addressing is used, since it requires additional memory accesses before reaching the actual memory location.
- Using indirect addressing mode is common in high-level programming languages, such as C and C++, which use dynamic data structures and pointers.
In summary, indirect addressing mode provides greater flexibility in accessing memory. Pointers have to be manipulated, and it can negatively impact performance if used for dynamic memory access. For experienced programmers, it is a powerful tool and is commonly used in high-level languages.