performance easy Apply io-redirection 2 points

Question 3. CSCD240-E1-A

Cause executable grader to run with stdout redirected to report.txt. pwd is part of PATH.

Work the drill

Answer on paper or in a terminal before revealing the ideal answer.

Ideal answer

grader > report.txt

Acceptable alternatives: ["./grader > report.txt"]

Misconception bank

Each row below is a plausible wrong answer, the thinking that produces it, and the remedy that corrects the misconception. These are the foundation of the multiple-choice framing and the targeted feedback a student receives after answering.

grader >> report.txt

Misconception. Uses append when overwrite was expected (no indication to preserve prior content).

Remedy. Reinforce: > truncates and creates; >> appends. Pair with CTFd 568/569 questions.

grader | report.txt

Misconception. Confuses pipe with redirection; pipes connect to another command, not a file.

Remedy. Re-draw: | = stdout→stdin of cmd; > = stdout→file. Show the error "bash: report.txt: command not found".

Authority mappings

Hover any chip for the mapping justification; click to open the authority record.

DCWF roles: IT-451 System Administrator

DCWF tasks: T0498

KU outcomes: CD-OSC-O2

KU topics: CD-BSP-T8i

Course-artifact links

Lectures

CSCD240-S26-L07. I/O redirection, aliases, source, .bashrc, env

Lab questions

CSCD240-S26-LAB4: Redirect echo hello to out.txt with > and then with >>. Show difference.

CTF challenges

03 I/O & Pipelines: The Overwriter
03 I/O & Pipelines: Don't Erase, Just Add