COMPUTER HARDWARE COMPONENTS FUNCTIONS
WHAT IS A MOTHERBOARD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Arithmetic Logic Unit (ALU)
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Control Unit (CU)
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Either A or B
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None of the above
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Detailed explanation-1: -The CPU is designed to understand a set of instructions-the instruction set. It fetches the instructions from the main memory and executes them. This is done repeatedly from when the computer is booted up to when it is shut down. The CPU fetches the instructions one at a time from the main memory into the registers.
Detailed explanation-2: -The control unit fetches (gets) the instruction from memory. The control unit decodes the instruction (decides what it means) and directs that the necessary data be moved from memory to the arithmetic/logic unit. These first two steps together are called instruction time, or I-time.
Detailed explanation-3: -The Control Unit sends a signal to the RAM in order to fetch the program and data, which is then stored in one of the CPU’s register. To do so, the CPU makes use of a vital hardware path called the ‘address bus’ along which the program and data travels. The Control Unit then increments the Program Counter (PC).
Detailed explanation-4: -Fetch, decode and execute cycle are the three steps that the CPU repetitively performs to complete one program instruction. The control unit decodes the machine instructions following the instruction format.