Identify the correct order of the terms A-E given below that completes the…
2023
Identify the correct order of the terms A-E given below that completes the paragraph describing a method of operation for a keyboard.
A computer keyboard has a key matrix underneath the keys. When a key is pressed, it presses a switch that completes a ______. This allows ______ to flow. The location of the key pressed is ______. The location of the key pressed is compared to a ______ map to find the ______ value for the key that has been pressed.
A. Binary
B. Calculated
C. Character
D. Circuit
E. Current
Choose the correct answer from the options given below
Answer: B. D, E, B, C, A — ConceptA keyboard matrix organizes keys at row-column intersections. Pressing a key closes an electrical circuit so current can flow and the keyboard…
- A.
E, D, B, C, A
- B.
D, E, B, C, A
- C.
C, D, B, E, A
- D.
A, E, B, C, D
Attempted by 43 students.
Show answer & explanation
Correct answer: B
Concept
A keyboard matrix organizes keys at row-column intersections. Pressing a key closes an electrical circuit so current can flow and the keyboard controller can detect the active intersection.
The controller then maps the detected key location to a character definition and emits the character as a binary code for the computer.
Application
A pressed key first closes a circuit, so the first blank is Circuit (D).
Closing the circuit allows current to flow, so the second blank is Current (E).
The controller scans the matrix and the pressed key location is calculated, so the third blank is Calculated (B).
That location is compared with a character map, so the fourth blank is Character (C).
The map supplies the binary value representing the pressed key, so the fifth blank is Binary (A).
Cross-check and contrast
The resulting process chain is circuit closure → current flow → location calculation → character-map lookup → binary value.
E, D, B, C, A places current before the circuit is closed, reversing cause and effect.
D, E, B, C, A follows the physical and logical sequence from key press to encoded output.
C, D, B, E, A begins with a character before the key circuit has been detected.
A, E, B, C, D begins with a binary value before the location has been detected and mapped.
Therefore, the required order is D, E, B, C, A.