04:547:202 – Object-Oriented Programming
Midterm exam
Problems
Imagine that you are part of a team working on a project to develop an interactive help
system. Below are the requirements that you need to implement.
1. Invite the user to describe their problem. Read the user’s sentence and display
each distinct word in the user’s input. Ignore differences in capitalization. (You
may want to re-use the InputReader class from one of the projects discussed.)
2. Display the words from the user’s sentence in alphabetical order. (You may want
to use a set that orders items automatically, or to transfer the set into an array of
Strings and sort the array.)
3. Provide a method for encrypting a word (represented by a String) by adding a
random (small) letter after each character in the original word. (Ex: “students”
may become “sutfuudwelnntaso”.)
4. Code the longest word from the user’s sentence and display the result. Ignore the
possibility that there may be more than one longest word.
5. Report how long (in seconds) it took the user to think and type their sentence, and
how long it took the program to do the rest of the processing. (You may want to
re-use the StopWatch class from one of the projects discussed.)
6. Repeat the whole procedure until the user types an empty line.
Grading
You get one point for each problem that you solve correctly. You get half a point for a
solution that is incomplete or slightly incorrect but displays effort in the right direction.
You earn a grade based on the number of points that you accumulate:
1 point: D
2 points: C
3 points: C+
4 points: B
5 points: B+
6 points: A
