Question

Identify the addressing mode that is used to define a constant or set initial value of a variable.

Answer 1

Answer:

this is the simplest form of addressing here the operand is given the instruction itself this mode is used to define a constant or set initial values of variables. The advantage of this mode is that no memory reference other than instruction fetch is required to obtain operand.

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Answer 2

ANSWER:- Operands must be processed for the majority of assembly language instructions. The location of the storage for the data that has to be processed is provided via an operand address.

EXPLANATION:- 1. Operands can be necessary for some instructions even though others may just need one, two, or three.
2. When an instruction calls for two operands, the source and destination are typically the first and second operands, respectively. The destination operand typically contains data in a register or memory location.
3. The source either includes the data to be delivered (immediate addressing) or the address of the data (in register or memory). In most cases, the process leaves the underlying data unchanged.
• Address Registration
4. A register houses the operand in this addressing style. The register could be either the first operand or the second operand, depending on the instruction.