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Check yourself 02-shell-pipes-and-redirection: Quiz

Retrieval practice. Target >=80%.

Class 17: Shell pipes and redirection
Class 17 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Linux Foundations
Activity type: Quiz / retrieval practice
Target: ≥80%
Objective: Identify file descriptors 0, 1, and 2 as standard input, standard output, and standard error

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Questions

    1. Which numeric file descriptors represent standard input, standard output, and standard error?
    1. In producer | consumer, which stream from producer is connected to consumer by default?
    1. What is the practical difference between > report.txt and >> report.txt?
    1. Why can an error still appear on the terminal after running command > output.txt?
    1. What does command > combined.txt 2>&1 do, and why does the order matter?
    1. What problem does tee solve in a pipeline?
    1. Why might a pipeline report success even if its first command failed?
    1. What does wc -l < services.csv commonly omit that wc -l services.csv commonly includes?
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After scoring

  • Missed items → return to Reading → redo Feynman Retry → reattempt.
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