The "brain" of the computer that executes instructions is called:
Correct answer: A. CPU (Central Processing Unit)
- A. CPU (Central Processing Unit)
- B. RAM (Random Access Memory)
- C. Motherboard
- D. System unit
Explanation
MAR (Memory Address Register) stores the memory address from which data will be fetched or to which data will be written. In this case, since we are reading from memory, the CPU places the address in the MAR to tell the memory unit where to find the data. Therefore, the MAR is the correct answer for where the CPU places the address to be read from memory.
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About Hardware and Software
Hardware includes the physical components of a computer, such as the CPU, motherboard, registers, memory, storage devices and peripheral equipment. Software covers system software, application software, utilities, drivers and firmware, with attention to how the operating system manages hardware and how software differs from the physical equipment it controls.
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