MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -An accumulator is a type of register for short-term, intermediate storage of arithmetic and logic data in a computer’s central processing unit (CPU). However, the term is rarely used in reference to contemporary CPUs, having been replaced around the turn of the millennium by the term register.

Detailed explanation-2: -Register A is quite often called as an Accumulator. An accumulator is a register for short-term, intermediate storage of arithmetic and logic data in a computer’s CPU (Central Processing Unit). In an arithmetic operation involving two operands, one operand has tobe in this register.

Detailed explanation-3: -Therefore, most of the instructions in the instruction set refer to the accumulator (e.g., the 6502 is an accumulator-based microprocessor). The purpose of all the microprocessors internal registers of 6502 is predefined by the manufacturer. Therefore, these are special purpose registers.

Detailed explanation-4: -The accumulator is an 8-bit register that is a part of arithmetic/logic unit (ALU). This register is used to store 8-bit data and to perform arithmetic and logical operations. The result of an operation is stored in the accumulator.

Detailed explanation-5: -The accumulator is a data register that can be used to store the results of calculations. The memory address register holds the address in main memory that is currently being read or written. It uses registers to help prevent slowing down the fetch-decode-execute cycle.