Bash Scripting Quiz

To pass the quiz, you must correctly answer at least 18 of the 20 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- What is a correct shebang line in bash script? #### --distractors-- `!#/bin/bash` --- `/#!bin/bash` --- `/#!/bin/bash` #### --answer-- `#!/bin/bash` ### --question-- #### --text-- Which command would define `MY_VAR` and print it to the console? #### --distractors-- `MY_VAR=10; echo MY_VAR` --- `$MY_VAR=10; echo MY_VAR` --- `$MY_VAR=10; echo $MY_VAR` #### --answer-- `MY_VAR=10; echo $MY_VAR` ### --question-- #### --text-- Which command is used to view all variables in the shell? #### --distractors-- `declare -n env` --- `declare -p env` --- `declare -x bashrc` #### --answer-- `declare -p` ### --question-- #### --text-- Which command would run a `script.sh` file? #### --distractors-- `script.sh bash` --- `zsh ./script.sh` --- `./sh script.sh` #### --answer-- `./script.sh` ### --question-- #### --text-- How to view the manual for the `less` command in bash? #### --distractors-- `less man` --- `less --man` --- `man --less` #### --answer-- `man less` ### --question-- #### --text-- How would you call the `print_arguments` function to print `a` and `b` to the terminal? ```bash print_arguments() { echo "Argument 1: $1" echo "Argument 2: $2" } ``` #### --distractors-- `print_arguments("a", "b")` --- `print_arguments(a, b)` --- `print_arguments{a, b}` #### --answer-- `print_arguments "a" "b"` ### --question-- #### --text-- How do you initialize an array in bash? #### --distractors-- `ARR=["item1" "item2" "item3"]` --- `ARR=[["item1" "item2" "item3"]]` --- `ARR={"item1" "item2" "item3"}` #### --answer-- `ARR=("item1" "item2" "item3")` ### --question-- #### --text-- How do you print the third value of an array in bash? #### --distractors-- `echo ${ARR[3]}` --- `echo $ARR[2]` --- `echo $ARR[3]` #### --answer-- `echo ${ARR[2]}` ### --question-- #### --text-- How do you assign user input to a variable in bash? #### --distractors-- `input MY_VAR` --- `cin MY_VAR` --- `get MY_VAR` #### --answer-- `read MY_VAR` ### --question-- #### --text-- What will be the permission flags for the `1.txt` file after executing the command `chmod 765 1.txt`? #### --distractors-- `rwxrwxrwx` --- `rwxr-xrw-` --- `r-xrw-rwx` #### --answer-- `rwxrw-r-x` ### --question-- #### --text-- What keyword does the statement `if ... then ...` end with? #### --distractors-- `end` --- `done` --- `stop` #### --answer-- `fi` ### --question-- #### --text-- What keyword does the statement `for ... do ...` end with? #### --distractors-- `end` --- `od` --- `stop` #### --answer-- `done` ### --question-- #### --text-- How do you create a comment in bash? #### --distractors-- `// comment` --- `!comment` --- `/* comment` #### --answer-- `# comment` ### --question-- #### --text-- What line should you add to the beginning of this snippet to create a `for` loop? ```bash do echo $i done ``` #### --distractors-- `for ( int i = 0; i < 10; i++ )` --- `for (( int i = 0; i < 10; i++ ))` --- `for (( let i = 0; i < 10; i++ ))` #### --answer-- `for (( i = 0; i < 10; i++ ))` ### --question-- #### --text-- How would you assign the result of the sum of variables `A` and `B` to the variable `C`? #### --distractors-- `C=$A + $B` --- `C=$( A + B )` --- `$C=$(( $A + $B ))` #### --answer-- `C=$(( A + B ))` ### --question-- #### --text-- Which command is used to create a new file? #### --distractors-- `newfile` --- `echo new_file` --- `fileargs` #### --answer-- `touch` ### --question-- #### --text-- What does the command `echo $?` do? #### --distractors-- Prints the value of the last used variable. --- Prints the value of the last used arithmetic operation. --- Prints the value of the last executed condition. #### --answer-- Prints the exit code of the last executed command. ### --question-- #### --text-- What advantage does Bash provide when testing parts of a script? #### --distractors-- Bash scripts must be compiled before testing. --- You can only test scripts using an IDE. --- Bash automatically generates test cases. #### --answer-- Script sections can be pasted directly into the terminal for testing. ### --question-- #### --text-- What types of loops exist in bash? #### --distractors-- `for` --- `for`, `while` --- `for`, `while`, `until`, `forEach` #### --answer-- `for`, `while`, `until` ### --question-- #### --text-- How do you print all values of an array in bash? #### --distractors-- `echo $ARR[@]` --- `echo {ARR[@]}` --- `echo ${ARR[$@]}` #### --answer-- `echo ${ARR[@]}`