FRQ Style Selection Coding Practice (2.1-2.6)

FRQ Style Selection Coding Practice (2.1-2.6)

Each coding exercise has its own folder. Open its .java file and press Run to try it. Run Tests checks every graded exercise in this lesson at once.

In the following exercises which are similar to the Free Response Questions (FRQs) in the AP exam, you will write code inside a method with parameters and return values. Make sure that you use the parameter variables given in the method header and return a value.

public static return-type method-name(param-type param-var1, param-type param-var2, ...)
{
    // ADD CODE HERE using the param-variables //
    return result;
}

Exercise 1

Create the method front_back(str, start, end) that takes three strings and returns a string based on the following conditions.

• If str contains start at the beginning and end at the end then return "s_e".
• If str contains start at the beginning of the string return "s".
• if str contains end at the end of the string return "e".
• Otherwise return "n".

Open the 01-front-back-written folder and edit FrontBack.java. Press Run to try it; Run Tests checks it (2 tests).

Exercise 2

The squirrels in Palo Alto spend most of the day playing. In particular, they play if the temperature is between 60 and 90 (inclusive). Unless it is summer, then the upper limit is 100 instead of 90. Given an int temperature and a boolean isSummer, return true if the squirrels play and false otherwise.

Open the 02-squirrelPlay-written folder and edit SquirrelParty.java. Press Run to try it; Run Tests checks it (1 test).

Exercise 3

Given a day of the week encoded as 0=Sun, 1=Mon, 2=Tue, …6=Sat, and a boolean indicating if we are on vacation, return a string of the form "7:00" indicating when the alarm clock should ring. Weekdays, the alarm should be "7:00" and on the weekend it should be "10:00". Unless we are on vacation – then on weekdays it should be "10:00" and weekends it should be "off".

Open the 03-alarmClock-written folder and edit VacayAlarmClock.java. Press Run to try it; Run Tests checks it (1 test).

Exercise 4

You and your date are trying to get a table at a restaurant. The parameter you is the stylishness of your clothes, in the range 0..10, and date is the stylishness of your date’s clothes. The result getting the table is encoded as an int value with 0=no, 1=maybe, 2=yes. If either of you is very stylish, 8 or more, then the result is 2 (yes). With the exception that if either of you has style of 2 or less, then the result is 0 (no). Otherwise the result is 1 (maybe).

Open the 04-dateFashion-written folder and edit DateStylishness.java. Press Run to try it; Run Tests checks it (1 test).