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A microcomputer consists of_____.
microprocessor
Memory
I/O device
All of the above
All of the above
A microcomputer is a complete computer system designed for individual use, characterized by a central processing unit (CPU) contained on a single integrated circuit known as a microprocessor. To function as a programmable system, it must be integrated with memory for data and program storage, and input/output (I/O) interfaces to facilitate communication with external peripherals.
A microcomputer is a complete computer system designed for individual use, characterized by a central processing unit (CPU) contained on a single integrated circuit known as a microprocessor. To function as a programmable system, it must be integrated with memory for data and program storage, and input/output (I/O) interfaces to facilitate communication with external peripherals.
System┬аComplexity=тИС(CPU+Memory+I/O) тАФ The functional components required to constitute a basic computing system.
The microprocessor acts as the brain, executing instructions fetched from memory. The system bus architecture connects the CPU, memory (RAM/ROM), and I/O modules, allowing the transfer of data (DbusтАЛ), addresses (AbusтАЛ), and control signals (CbusтАЛ). This integration allows the microcomputer to perform arithmetic, logic, and control operations, forming the foundation of modern computing.
A microcomputer relies on the integration of these three fundamental blocks to execute stored programs.
The CPU performs the instruction cycle: Fetch, Decode, and Execute.
Memory units are categorized into Volatile (RAM) for working space and Non-Volatile (ROM/Flash) for firmware.
I/O devices bridge the gap between the internal binary world of the CPU and the external real-world signals.
Compact physical footprint
Lower power consumption compared to mainframes
High cost-effectiveness for single-user tasks
Limited processing power compared to supercomputers
Scalability is restricted by bus limitations and clock speed
Embedded Control Systems
Personal Computers (PCs)
Industrial Automation & Instrumentation
Microcomputers were historically defined by their size; today, this architecture is the basis for Microcontrollers.
Option A, B, and C are essential parts, but none independently constitute a 'microcomputer', making D the only comprehensive answer.
D is correct тАФ A microcomputer is defined by the integration of a microprocessor, memory units, and I/O peripherals into a cohesive processing system.
In competitive exams, remember that for any computing system to be 'complete' (Turing-complete), it must have logic (CPU), storage (Memory), and a way to interact with the environment (I/O).