CMSC132 Fall 2005Midterm #1First Name: _______________________Last Name: _______________________Student ID: _______________________Section time ___________ TA: __________________________I pledge on my honor that I have not given or received any unauthorized assistance on this examination.Your signature: _____________________________________________________________General Rules (Read):- This exam is closed book and closed notes.- If you have a question, please raise your hand.- Total point value is 100 points. - Answer True/False questions by circling the T or F at the end of the question.- Answer multiple-choice questions by circling the letter (e.g., a, b) at the front of each choice.- Answer essay questions concisely using 1 or 2 sentences. Longer answers are not necessary and are discouraged.- WRITE NEATLY. If we cannot understand your answer, we will not grade it (i.e., 0 credit).1Grader Use Only:#1 (21)#2 (29)#3 (21)#4 (18)#5 (11)Total (100)Honors (10)2Problem 1 Software Development & Testing (21 pts)A. (1 pt) Why are large pieces of software harder to develop than small pieces of software?a. Larger software take much more time to writeb. Larger software take many more programmers to writec. Larger software take much faster computers to executed. Larger software require more computer memory e. Larger software are more complex B. (1 pt) The software life cycle is a sequence of essential operations necessary for producing quality software. Which of the following operation is not part of the software life cycle? a. Specificationb. Codingc. Debuggingd. Testinge. ReleaseC. (4 pts) The waterfall model of software development…a. Describe its basic approachb. Should be used for large software projects T or Fc. Is accepted as the best model for developing software T or FD. (4 pts) The unified model of software development…a. Describe its basic approachb. Should be used for large software projects T or Fc. Is accepted as the best model for developing software T or FE. (5 pts) Problem specification is a phase of the software life cyclea. Describe its basic goalb. Specifications usually never change T or Fc. Specifications can describe all possible inputs T or Fd. Specifications written in English are very precise T or F3F. (6 pts) Program testinga. What is “black box” testing?b. Empirical testing depends on analysis of code T or Fc. Empirical testing can eliminate all errors T or Fd. Program verification depends on calculating pre & post-conditions T or Fe. Good unit tests eliminate the need for integration tests T or FProblem 2 Object-Oriented Design (29 pts)G. (5 pts) Procedural-oriented view vs. object-oriented design a. Describe the procedural-view approach to software designb. Procedural-oriented view produces programs which run faster T or Fc. Why do modern software developers prefer object-oriented design?H. (6 pts) Abstraction and encapsulation a. Why do software developers use abstraction and encapsulation?b. Give an example of Java support for abstractionc. Give an example of Java support for encapsulationI. (6 pts) Inheritancea. Inheritance describes a relationship between related classes T or Fb. Inheritance encourages code reuse T or Fc. Many forms of inheritance exist in Java T or Fd. Java supports combined (multiple) inheritance T or Fe. Provide an example of how specification is supported in Java4J. (12 pts) Given the following problem description, produce an object-oriented solution.Include as many details as possible. Draw a UML class diagram (you may write code for Javaclasses ONLY if you don't know UML, but will lose points if you do so). Write a submit server for student programming projects. The submit server supports twotypes of users, students and TAs. Students can submit code to the server. The server mustrecord the time and code for student submissions in a database. Once submitted, the servermust compile code execute it using test cases as input. Test cases may be public or private.Scores from executing code for each test case must be recorded and saved in the database.Students may get their scores for each test case from the server. TAs can also obtain testscores for all student submissions. In addition TAs can also examine code from all studentsubmissions.5Problem 3 Unified Modeling Language (21 pts)K. (6 pts) UML …a. Provides a software blueprint for object-oriented software systems T or Fb. Can describes both the static and dynamic behavior of a software system T or Fc. Name two types of UML diagrams (excluding class diagrams)d. Name four types of relationships between classes in a UML class diagramL. (8 pts) Given the following Java code, draw its UML class diagram (you may write code for Java classes ONLY if you don't know UML). Include as much information as possible in the UML class diagram.public interface Device {public void setPower(double power);}public class Speaker {int volume = 1;public void setVolume(int volume) {this.volume = volume;}public String toString() {return "Volume: " + volume;}}public class TV {protected Speaker[] speaker;public TV() {speaker = new Speaker[2];speaker[0] = new Speaker();speaker[1] = new Speaker();}public Speaker getSpeaker(int number) {return speaker[number-1];}}public class HDTV extends TV implements Device {private double power;public HDTV() {speaker[0].setVolume(10);speaker[1].setVolume(20);power = 120;}public void setPower(double power) {this.power = power;}public String toString() {String res = speaker[0] + " " + speaker[1];return (res + " Power: " + power);} }67M. (7 pts) Consider the UML diagram below:a. Which class contains class F? b. Which class uses class B? c. Which class may change if class E changes?d. How many instances of class F does class E have? e. How many instances of class B does class E have?f. Class D may be used wherever Class A is used T or Fg. Class C may be used wherever Class F is used T or FProblem 4 Java Programming (18 pts)N. (7 pts) Java Language Featuresa. Static initialization blocks are all executed before constructors T or Fb. Non-static initialization blocks are all executed before constructors T or Fc. Visibility modifiers determine which variables may be used where in Java T or Fd. List the four types of visibility modifiers in Java8E2*FA BDC1E2*FA BDC1O. The class Laptop is defined as follows:public class Laptop implements Comparable {static ArrayList allLaptops = new ArrayList();private int id;public Laptop(int id) {this.id =
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