Why does the read -p command not print the prompt text when used inside a script redirected from a file (e.g., bash script.sh < input.txt)?

hard🧠 Conceptual Q10 of 15

Bash Scripting - User Input

Why does the read -p command not print the prompt text when used inside a script redirected from a file (e.g., bash script.sh < input.txt)?

ABecause <code>read</code> only works interactively

BBecause <code>read</code> detects input is not from terminal and skips prompt

CBecause input redirection disables all output

DBecause <code>-p</code> option is ignored in scripts

Step-by-Step Solution

Solution:

Step 1: Understand input redirection effect
When input is redirected, read input is not from terminal.
Step 2: Behavior of read -p
read shows prompt only if input is from terminal; otherwise, prompt is skipped.
Final Answer:
Because read detects input is not from terminal and skips prompt -> Option B
Quick Check:
Prompt shown only if input is terminal = D [OK]

Quick Trick: Prompt appears only if input is from terminal [OK]

Common Mistakes:

MISTAKES

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