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Which of the following statements are true about the Central Processing Unit (CPU)? i. The CPU is often referred to as the brain of the computer. ii. The CPU performs basic arithmetic, logic, controlling, and input/output operations. iii. The CPU executes instructions of a computer program. iv. The CPU is responsible for storing long-term data like photos and videos on the hard drive.
i, ii and iv
i, ii and iii
ii, iii and iv
All of the above
i, ii and iii
The Central Processing Unit (CPU) is the primary component of a computer that executes instructions, manages control flow, and performs arithmetic and logic operations. Statement (iv) is incorrect because storage of long-term data like photos and videos is the function of secondary storage devices (e.g., HDD, SSD), not the CPU.
ISO/IEC 2382:2015 Information Technology Vocabulary
The Central Processing Unit (CPU) is the primary component of a computer that executes instructions, manages control flow, and performs arithmetic and logic operations. Statement (iv) is incorrect because storage of long-term data like photos and videos is the function of secondary storage devices (e.g., HDD, SSD), not the CPU.
Throughput=TimeInstructionsтАЛ тАФ Defines computational performance
Clock┬аSpeed=Cycle┬аTime1тАЛ тАФ Defines the operational frequency in Hz
The CPU functions via the Instruction Cycle: Fetch, Decode, and Execute. It fetches instructions from memory, decodes them using the control unit, and performs required operations via the Arithmetic Logic Unit (ALU). Data is stored in registers for rapid access, while long-term persistence is delegated to non-volatile storage media.
The CPU contains the ALU, Control Unit, and Registers.
Storage devices are distinct from the CPU; the CPU uses Cache (L1, L2, L3) for temporary, high-speed data access.
The Control Unit manages the flow of data through the processor.
High-speed data processing
Versatility in executing varied instruction sets
High power consumption leading to thermal dissipation requirements
Limited volatile memory capacity compared to secondary storage
General purpose computing
Embedded system control
Industrial automation
The CPU only accesses data residing in RAM (Primary memory) during runtime.
Secondary storage devices (Hard drives) use interfaces like SATA or NVMe to transfer data to RAM, not directly through the CPU's primary arithmetic circuits.
B is correct тАФ i, ii and iii are true statements defining the fundamental architectural roles of the CPU.
Always differentiate between volatile storage (Registers/Cache/RAM), which is managed by the CPU, and non-volatile storage (HDD/SSD/Flash), which the CPU manages only via I/O controllers.