Question

Which one of the following is INCORRECT about Input Unit of a Computer ?

• A. It reads instructions and data from outside world
• B. It converts instructions and data to acceptable form
• C. It supplies instructions and data to storage unit
• D. It releases instructions and data to output unit

Hint:

Information flow in a computer follows a strict path: Input $\rightarrow$ Processing/Storage $\rightarrow$ Output. Data never jumps directly from Input to Output.

Answer 1

The Correct Option is D

Concept: The Input Unit is the interface between the user and the computer's internal system. Its primary functions are collection, conversion, and transmission to the internal processing/storage areas.

Step 1: Verify standard functions.
- Reading (1): The input unit must read or accept data provided by the user from external sources. - Conversion (2): Computers only understand binary ($0$s and $1$s). The input unit converts human-readable data into this machine-acceptable form. - Supply (3): Once converted, the data is sent to the storage unit (memory) so it can be accessed by the CPU.

Step 2: Identify the incorrect function.
The Input Unit does not interact directly with the Output Unit. Data must first be processed by the CPU or stored in memory before it can be sent to an output device for display.

Step 3: Conclusion.
Releasing instructions directly to the output unit bypasses the entire purpose of a computer (processing), making statement (4) incorrect.