EECS2030E Test 3

Monday October 24, 2016, 14:00-15:20
Lab 01
Version D

Instructions

There is one programming question and a set of short answer questions.

Instructions for submitting your programming question solution are given in the Programming question section. You may submit as many times as you want; your most recent submission will be the one recorded.

Instructions for submitting your answers to the short answer questions are given in the Short Answer Questions section. You may submit as many times as you want; your most recent submission will be the one recorded.

Programming question

Implement this API. A skeleton can be found here here. The skeleton compiles, but the constructors are not implemented and the methods do not return the correct values; you should complete the constructors and methods to satisfy their APIs. The provided code does not provide you with non-static fields; you need to decide which fields the class requires.

For reference: the Java API is here.

Submit your program using the following command in a terminal (make sure you are in the directory containing your file Temperature.java):

submit 2030 test3D Hour.java


Short Answer Questions

Question 1

What term best describes an aggregation relationship?

A. has-a
B. is-a
C. owns-a
D. uses-a

Question 2

In one sentence state what the purpose of a singleton class is.


Question 3

State 3 different test cases for the method to12HourClock(int) in the class Hour. Make sure that the test cases test different ways that the method might fail.


Question 4

State two class invariants that the Hour class has.



Enter your answers into a text file named answers.txt. You can use the editor of your choice for this. You can also create a text file in Eclipse by selecting "New" and then "Untitled Text File" in the "File" menu. Make sure that you save your file. Also make sure that you indicate which question you are answering, e.g. Q1: answer to question 1 Q2: answer to question 2 Q3:...

Submit your answers using the following command in a terminal (make sure you are in the directory containing your file answers.txt):

submit 2030 test3D answers.txt