[amp_mcq option1=”defines the fundamental method of determining effective operand addresses” option2=”are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.” option3=”performs indicated operations on two fast registers of the machine and leave the result in one of the registers.” option4=”all of the above E. None of the above” correct=”option1″]
The correct answer is: A. defines the fundamental method of determining effective operand addresses
Addressing modes are the ways in which the operands of an instruction are specified. They define the fundamental method of determining effective operand addresses.
There are many different addressing modes, each with its own advantages and disadvantages. Some common addressing modes include immediate addressing, direct addressing, indirect addressing, and register addressing.
Immediate addressing is the simplest addressing mode. In immediate addressing, the operand is specified as part of the instruction itself. This can be convenient, but it limits the size of the operand that can be used.
Direct addressing is similar to immediate addressing, except that the operand is stored in memory rather than as part of the instruction. This allows for larger operands, but it requires more memory to store the instruction.
Indirect addressing is a more complex addressing mode. In indirect addressing, the operand is not stored directly in memory, but rather in a pointer register. The pointer register contains the address of the operand, which is then used to access the operand. This allows for greater flexibility in addressing operands, but it also makes the instruction more complex.
Register addressing is the simplest and most efficient addressing mode. In register addressing, the operand is stored in a register. This allows for very fast access to the operand, but it limits the size of the operand that can be used.
The choice of addressing mode depends on the specific needs of the instruction. Some instructions require a specific addressing mode, while others can use any addressing mode. The programmer must choose the addressing mode that best suits the needs of the instruction.
The other options are incorrect because they do not define the fundamental method of determining effective operand addresses.