Question

Q.1. Which of the following is not a type of instruction format
A. One Byte Instruction
B. Register to Register instruction
C. Register to-from memory with displacement
D. None of the Above​

Answer 1

The correct answer is option (C.) Register to-from memory with displacement.

Explanation:

• Register to-from memory with displacement is not a type of instruction format.
• An instruction format defines the layout of bits of an instruction, in terms of its constituent parts.
• Each explicit operand is referenced using one of addressing modes.
• So, the correct answer is option C. i.e Register to-from memory with displacement.

Answer 2

Option (C) is correct.

"Register to-from memory with displacement" is not a type of instruction format.

About type of instruction format :

• In a one-byte instruction, the operator and operand are both in the same byte. Operands are internal registers that appear in the form of characters in the instruction.

• The Register-to-Register (RR) instructions conduct the stated actions on the machine's two fast registers and store the result in one of them.

• This instruction format includes one or two additional bytes for displacement, as well as a two-byte register to/from memory format with no displacement.