$ cat questions
'What is the capital of the United States of America?
  a) Florida
  b) Chicago
  c) Washington D.C
  d) none of these'
'The sky is what colour?
  a) Blue
  b) Green
  c) Grey
  d) Orange'
'Insects have how many legs?
  a) 3
  b) 6
  c) 9
  d) 12'
'Which is the only fruit with the seeds on the outside?
  a) strawberry
  b) bananna
  c) orange
  d) lime'
 
$ cat correct
"c" "a" "b" "a"

#!/bin/bash
ALLOW_TIME=120
eval "QUESTIONS=($(cat questions))"
eval "CORRECT=($(cat correct))"
eval "ANSWER=($(cat answers))"
PRE="$( tput sc ; tput civis ; tput cup 0 60)"
POST="$( tput el ; tput rc ; tput cnorm)"
BACK="$( tput cub1 )"
do_timer()
{
   sleep 10
   WAIT=$1
   while [ -d /proc/$WAIT ]
   do
      if [ $SECONDS -gt $ALLOW_TIME ]
      then
         kill -14 $WAIT
         break;
      fi
      show_time
      [ $(($ALLOW_TIME-$SECONDS)) -gt 90 ] && sleep 20
      sleep 2
   done
}
show_time()
{
  LEFT=$(($ALLOW_TIME-$SECONDS))
  if [ $LEFT -lt 90 ]
  then
      echo -e "${PRE}Time to go: $LEFT secs${POST}\c"
  else
      echo -e "${PRE}Time to go: $((($LEFT+59)/ 60)) mins${POST}\c"
  fi
}
timeout()
{
   echo -e "\nTime is up...Sorry"
   save_answers
}
 
ask()
{
    clear
    echo "Question $((QNUM+1)) of ${#QUESTIONS[@]}"
    show_time
    echo
    echo -e "${QUESTIONS[$QNUM]}\n"
    echo -e "Your answer: ${ANSWER[$QNUM]:- }$BACK\c"
    read new_ans
    new_ans=${new_ans:-${ANSWER[$QNUM]}}
    case $new_ans in
        a|b|c|d) ANSWER[$QNUM]=$new_ans ;;
        *) echo "Illegal answer - please try again" ;
           sleep 1 ;
           return 2 ;;
    esac
    while true
    do
        echo -e "Type n for next, p for previous, q for quit: \c"
        show_time
        read nav
        case $nav in
            n|N) return 0 ;;
            p|P) return 1 ;;
            q|Q) return 3 ;;
        esac
    done
}
trap "timeout ; exit" 14
save_answers()
{
    echo -e "\c" > answers
    QNUM=0
    SCORE=0
    while [ $QNUM -lt ${#QUESTIONS[@]} ]
    do
        echo "\"${ANSWER[$QNUM]}\" " >> answers
        [ "${CORRECT[$QNUM]}" = "${ANSWER[$QNUM]}" ] && let SCORE=SCORE+1
        let QNUM=QNUM+1
    done
    echo "You got $SCORE questions correct out of ${#QUESTIONS[@]}"
}
do_timer $$ &
QNUM=0
while true
do
   ask $QNUM
   case $? in
       0)  let QNUM=QNUM+1 ;;  # Next
       1)  let QNUM=QNUM-1 ;;  # Prev
       3)  break ;; # Quit/Done
   esac
   [ $QNUM -ge ${#QUESTIONS[@]} ] && QNUM=0
   [ $QNUM -lt 0 ] && let QNUM=${#QUESTIONS[@]}-1
done
save_answers