jName______Practice
ExamI ComputerScience119
Inquestions1-5circlethebestanswerinthemultiplechoice.
1.Thefollowingstatementwilldeclareavariable,numb,thatwillbeusedtostore the weight of a candy bar to the nearest tenth of a gram.
a.integergrams;
b.intgrams;
c.double grams;
d.real grams;
2.Theoperationsperformedbyaclassarecalled
a.objects.
b.methods.
c.syntax.
d.identifiers.
3.CompiledJavaprogramscanonlyberanoncomputerswith:
a.aJVM.
b.abrowser.
c.microphone.
d.anIDE
4.AstandaloneJavaprogramis:
a.aMachineLanguageprogram.
b.anApplet.
c.anApplication.
d.anexampleofHardware.
5.HowcanyoucompileaJavaprogramineclipse?
6.CirclethenamesinthislistthatfollowtheconventionusedbyJavaprogrammerstonamevariables:(10points)
something Something balance200099balloons voting#machine
7.WriteaJavastatementtoprintthemessage"LettheGamesBegin!"onthescreen.
8.WhatcharactersareusedtobeginandendaclassinJava?
9.RewritethismathequationasaassignmentstatementinJava:
10.WhatLinuxcommanddoyouusetochange directories intoadirectorynamedmyjava.
11.WhatisthevalueofthisJavaexpression: 6 – 2/3+8
12.WritethelinenecessarytocreateaScannerthatcanbeusedforinput. Assume the Scanner class has already been imported.
13.UsetheScanneryoucreatedin#12toinputan integer into a variable,cars.
14.Whatistheoutputofthisprogram?
//Programtellnumberofcookies
importjava.text.*;
publicclassDozens
{
publicstaticvoidmain(String[]args)
{
intcookies;
intdozen;
cookies=58;
dozen=58/13;
System.out.println(dozen+"DozenCookies");
}
}
15.Correcttheerror.Linenumbersaretohelpyoufindtheerror.
1//programtofigureaveragespeedonatrip
2//fromD.C.toN.Y.
3
4publicclassTravel2
5{
6 publicstaticvoidmain(String[]args)
7 {
8 System.out.print("Thespeedonatrip");
9 System.out.println("fromD.C.toN.Y.is"+233/7-2);
10 }
11}
ErrorMessage:
Travel2.java:9:operator-cannotbeappliedtojava.lang.String,int
System.out.println("fromD.C.toN.Y.Is"+233/7-2);
16.Rewritethisprogramsothatitisingoodprogrammingstyle.(10points)
publicclass houston
{publicstaticvoidmain
(String[]args){
System.out.print
("Three...");System.out.print(
"Two...");System.out.println("One...");
System.out.println("Houston,wehaveaproblem.");}}
17.Writeajavaprogramtoinputa the base and the height of a triangle then output it's area.
(10points)