715.6 Customize or Write Simple Scripts (weight: 2) BSD-SPECIALIST Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which command-line option for bash performs syntax checking of a script without executing it?

   • A-v
   • B-x
   • C-e
   • D-n
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   In a shell script, what is the purpose of the backslash (\) escape character?

   • AIt is used for command substitution.
   • BIt starts a comment in the script.
   • CIt removes the special meaning of the following character.
   • DIt indicates a line continuation in the script.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A monitoring script must wait until a background process finishes, then print its exit status. The process ID is stored in the variable $pid. Which code correctly waits for the process and reports its status?

   • Asleep $pid echo "Exit status: $?"
   • Bwait $pid echo "Exit status: $?"
   • Cwait echo "Exit status: $?"
   • Dkill $pid echo "Exit status: $?"
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5. 14foundation · easy

   A script is invoked as: ./myscript.sh alpha beta gamma. Which variable holds the value 'beta'?

   • A$2
   • B$3
   • C$0
   • D$1
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6. 15foundation · easy

   What is the effect of enclosing a string in single quotes in a shell script?

   • AIt allows command substitution but prevents variable expansion.
   • BIt prevents variable expansion and command substitution.
   • CIt allows variable expansion but prevents command substitution.
   • DIt allows both variable expansion and command substitution.
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