System Commands, OPPE 2

May 2026 term, Set A

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Question 1

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You are working on a C project and need to scaffold a base project skeleton.

Write a script scaffold.sh that creates the following filesystem structure:

include/
└── my_project/
    └── config.h
src/
├── main.c
└── config/
    ├── config.debug.h
    ├── config.release.h
    └── config.h -> config.release.h
tests/

The script should take one command-line argument, which can be either debug or release. Depending on the argument, the config.h symbolic link should point to the corresponding configuration file:

• debug → config.debug.h
• release → config.release.h

For example, ./scaffold.sh debug should result in src/config/config.h -> config.debug.h, and ./scaffold.sh release should result in src/config/config.h -> config.release.h.

The script should create all required directories and files.

Instructions

• Write your script in scaffold.sh. It will be given the command line argument debug or release and should use it to create the symlink.
• It should create the files and folders in the current directory.
• Files can be empty files.
• If the link is not correctly created, the test fails and no marks are given. There are no partial marks.

Hints

• Symlinks store the path relative to the link itself.

The test lists what your script created, with -> after each symlink.

Code Editor

Bash

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#!/usr/bin/bash
# Write your scaffold.sh here

#!/usr/bin/bash # Write your scaffold.sh here

Run sample testsSubmit

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You are working on a C project and need to scaffold a base project skeleton. Write a script `scaffold.sh` that creates the following filesystem structure: ```text include/ └── my_project/ └── config.h src/ ├── main.c └── config/ ├── config.debug.h ├── config.release.h └── config.h -> config.release.h tests/ ``` The script should take one command-line argument, which can be either `debug` or `release`. Depending on the argument, the `config.h` symbolic link should point to the corresponding configuration file: - `debug` → `config.debug.h` - `release` → `config.release.h` For example, `./scaffold.sh debug` should result in `src/config/config.h -> config.debug.h`, and `./scaffold.sh release` should result in `src/config/config.h -> config.release.h`. The script should create all required directories and files. ## Instructions - Write your script in `scaffold.sh`. It will be given the command line argument `debug` or `release` and should use it to create the symlink. - It should create the files and folders in the current directory. - Files can be empty files. - If the link is not correctly created, the test fails and no marks are given. There are no partial marks. ## Hints - Symlinks store the path relative to the link itself. The test lists what your script created, with `->` after each symlink. ## Definition An automorphic number is a number whose square ends in the same digits as the number itself. A number `n` is called automorphic if `n² (mod 10^d) = n` where `d` is the number of digits in `n`. ## Problem Statement Given a number as input, print whether it is automorphic or not. ## Output Format - `1` if the number is automorphic - `0` if the number is not automorphic ## Instructions - Write your script in `script.sh`. - Read the number from standard input. - Print the output to standard output. ## Sample Input ```text 25 ``` ## Sample Output ```text 1 ``` ## Sample Input ```text 26 ``` ## Sample Output ```text 0 ``` ## Constraints - The number will always be positive and entered without a leading sign. - The number will not have any fractional values. - The number may be of any length within bash limits. - We are considering base 10 here. Given a line of text as input, find the longest word whose characters are all distinct. A word consists only of alphabetic characters (a-z). Words are separated by spaces. If multiple words have the same maximum length, print the first one. ## Instructions - Create your solution in `script.sh`. - It should read input from standard input. - It should output (if any) to standard output. ## Sample Input ```text perhaps one did not want to be loved so much as to be understood ``` ## Sample Output ```text loved ``` ## Sample Input ```text if you want to keep a secret you must also hide it from yourself ``` ## Sample Output ```text yourself ``` ## Constraints - The input contains at least one word. - Words contain only English letters. - There may be multiple spaces between words. - The input can be arbitrarily long. - The words are all in lowercase. - The line contains only words and spaces. - If no words have unique characters, print nothing.