Which term is described as 'brain of computer'?

• A. Central processing unit
• B. Echo check
• C. Parity check
• D. Asymmetric encryption

Answer: (D)

The brain of a computer is the central processing unit. This part is responsible for running programs, making decisions, and carrying out instructions. It fetches instructions from memory, decodes what they mean, and executes the required operations, performing calculations and coordinating data flow between memory, input/output, and other components. In short, it controls the computer’s activities and determines what happens next, which is why it’s described as the brain.

The other terms refer to different functions. Echo check and parity check are methods used to detect errors in data transmission or storage, not to perform processing. Asymmetric encryption is a cryptographic technique used to secure data, not a component that runs and coordinates the computer’s operations.