If P(A) = 0.4; P(B ∣ A) = 0.05; P(C ∣ A) = 0.04;

Which command is used to search for a pattern in files?

What is the exit status code of a successfully executed command in Linux shell?

Which character is used to denote a single-line comment in a shell script?

Which operator enables process substitution in bash (e.g., diff <(cmd1) <(cmd2))?

In shell scripting, which symbol is used to redirect the standard output to a file, overwriting its contents?

To check if a file /tmp/data.txt is both readable and writable by the current user in a shell conditional, which test is correct?

In a POSIX shell script, which construct correctly tests whether variable x is an empty string?

Which of the following is the syntax for an `if` statement checking if a variable `NUM` is numerically equal to 5?

In Bash, which syntax is used for arithmetic expansion?

Which command is used to search for a string inside a file?