Self Test 1

Self Test 1The following questions will help you measure your understanding of the material presented in this chapter. Read all of the choices carefully, as there may be more than one correct answer. Choose all correct answers for each question. Stay focused.If you have a rough time with these at first, don't beat yourself up. Be positive. Repeat nice affirmations to yourself like, "I am smart enough to understand enums" and "OK, so that other guy knows enums better than I do, but I bet he can't <insert something you are good at> like me."1. Given the following,1. interface Base {2. boolean m1 ();3. byte m2(short s);4. }Which code fragments will compile? (Choose all that apply.)A.interface Base2 implements Base { }B.abstract class Class2 extends Base {public boolean ml() { return true; } }C.abstract class Class2 implements Base { }D.abstract class Class2. implements Base {public boolean m1() { return (true); } }E.class Class2 implements Base {boolean m1( ) { return false; }byte m2(short s) { return 42; } }2. Which declare a compilable abstract class? (Choose all thatapply.)A.public abstract class Canine { public Bark speak(); }B.public abstract class Canine { public Bark speak() { } }C.public class Canine { public abstract Bark speak(); }D.public class Canine abstract { public abstract Barkspeak(); }3. Which is true? (Choose all that apply. )A."X extends Y" is correct if and only if X is a class andY is an interface.B."X extends Y" is correct if and only if X is an interfaceand Y is a class.C."X extends Y" is correct if X and Y are either both classesor both interfaces.D."X extends Y" is correct for all combinations of X and Ybeing classes and/or interfaces.4. Which are valid declarations? (Choose all that apply.)A.int $x;B.int 123;C.int _123;D.int #dim;E.int %percent;F.int *divide;G.int central_sales_region_Summer_2005_gross_sales;5. Which method names follow the JavaBeans standard? (Choose allthat apply.)A.addSizeB.getCustC.deleteRepD.isColoradoE.putDimensions6. Given:1. class Voop {2. public static void main(String [] args) {3. doStuff(1);4. doStuff(1, 2);5. }6. // insert code here7. }Which, inserted independently at line 6, will compile? (Chooseall that apply.)A.static void doStuff(int... doArgs) { }B.static void doStuff (int [] doArgs) { }C.static void doStuff(int doArgs...) { }D.static void doStuff(int... doArgs, int y) { }E.static void doStuff(int x, int... doArgs) { }7. Which are legal declarations? (Choose all that apply. )A.short x [];B.short [] y;C.short [5] x2;D.short z2 [5];E.short [] z [] [];F.short [] y2 = [5];8. Given:1. enum Animals {2. DOG ("woof"), CAT ("meow"), FISH ("burble");3. String sound;4. Animals(String s) { sound = s; }5. }6. class TestEnum {7. static Animals a;8. public static void main(String[] args) {9. System.out.println(a.DOG.sound + " " + a.FISH.sound);10. }11. }What is the result?A.woof burbleB.Multiple compilation errorspilation fails due to an error on line 2pilation fails due to an error on line 3pilation fails due to an error on line 4pilation fails due to an error on line 99. Given:1. enum A { A }2. class E2 {3. enum B { B }4. void C() {5. enum D { D }6. }7. }Which statements are true? (Choose all that apply.)A.The code compiles.B.If only line 1 is removed the code compiles.C.If only line 3 is removed the code compiles.D.If only line 5 is removed the code compiles.E.If lines 1 and 3 are removed the code compilesF.If lines 1, 3 and 5 are removed the code compiles.Answers1.☑C and D are correct, C is correct because an abstract class doesn'thave to implement any or all of its interface's methods. D iscorrect because the method is correctly implemented.☒A is incorrect because interfaces don't implement anything, B is incorrect because classes don't extend interfaces. E is incorrectbecause interface methods are implicitly public, so the methodsbeing implemented must be public. (Objective 1.1)2.☑B is correct. abstract classes don't have to have any abstractmethods.☒A is incorrect because abstract methods must be marked as such,C is incorrect because you can't have an abstract method unlessthe class is abstract. D is incorrect because the keyword abstractmust come before the class name. (Objective 1.1)3.☑C is correct.☒A is incorrect because classes implement interfaces, they don't extend them. B is incorrect because interfaces only "inherit from"other interfaces. D is incorrect based on the preceding rules.(Objective 1.2)4.☑A, C, and G are legal identifiers.☒B is incorrect because an identifier can't start with a digit. D, E, and F are incorrect because identifiers must start with $, _,or a letter. (Objective 1.3)5.☑B and D use the valid prefixes 'get' and 'is'.☒A, C, and E are incorrect because 'add', 'delete' and 'put' are not standard JavaBeans name prefixes. (Objective 1.4)6.☑A and E use valid var-args syntax.☒B and C are invalid var-arg syntax, and D is invalid because thevar-arg must be the last of a method's arguments. (Objective 1.4) 7.☑A, B, and E are correct array declarations; E is a three dimensionalarray.☒C, D, and F are incorrect, you can't include the size of your array in a declaration unless you also instantiate the array object. Fuses invalid instantiation syntax. (Objective 1.3)8.☑A is correct; enums can have constructors and variables.☒B, C, D, E, and F are incorrect; these lines all use correct syntax.(Objective 1.3)9.☑D and F are correct. Line 5 is the only line that will not compile,because enums cannot be local to a method.☒A, B, C and E are incorrect based on the above. (Objective 1.3)Self Test 21. Which statement(s) are true? (Choose all that apply.)A.Has-a relationships always rely on inheritance.B.Has-a relationships always rely on instance variables.C.Has-a relationships always require at least two classtypes.D.Has-a relationships always rely on polymorphism.E.Has-a relationships are always tightly coupled.2. Given:class Clidders {public final void flipper(){ System.out.println("Clidder"); }}public class Clidlets extends Clidders {public void flipper() {System.out.println("Flip a Clidlet");super.flipper();}public static void main(String [] args) {new Clidlets().flipper();}}What is the result?A.Flip a ClidletB.Flip a ClidderC.Flip a ClidderFlip a ClidletD.Flip a ClidletFlip a Clidderpilation fails.3. Given:public abstract interface Frobnicate { public voidtwiddle(String s) ; }Which is a correct class? (Choose all that apply.)A.public abstract class Frob implements Frobnicate {public abstract void twiddle(String s){}}B.public abstract class Frob implements Frobnicate { }C.public class Frob extends Frobnicate {public void twiddle(Integer i) { }}D.public class Frob implements Frobnicate {public void twiddle(Integer i) { }}E.public class Frob implements Frobnicate {public void twiddle(String i) { }public void twiddle(Integer s) { }}4. Given:class Top {public Top(String s) { System.out.print("B"); }}public class Bottom2 extends Top {public Bottom2(String s) { System.out.print("D"); }public static void main(String [] args) {new Bottom2("C");System.out.println(" ");}}What is the result?A.BDB.DBC.BDCD.DBCpilation fails.5. Select the two statements that best indicate a situation withlow coupling. (Choose two.)A.The attributes of the class are all private.B.The class refers to a small number of other objects.C.The object contains only a small number of variables.D.The object is referred to using an anonymous variable, notdirectly.E.The reference variable is declared for an interface type,not a class. The interface provides a small number ofmethods.F.It is unlikely that changes made to one class will requireany changes in another.6. Given:class Clidder {private final void flipper() { System.out.println("Clidder"); }}public class Clidlet extends Clidder {public final void flipper(){ System.out.println("Clidlet"); }public static void main(String [] args) {new Clidlet().flipper();}}What is the result?A.ClidletB.ClidderC.ClidderClidletD.ClidletClidderpilation fails.7. Using the fragments below, complete the following code so itcompiles. Note, you may not have to fill all of the slots.Code:class AgedP {__________ _________ _________ _________ _________ public AgedP(int x) {_ ________ _ ________ _ ________ ____________________}}public class Kinder extends AgedP {_________ _________ _________ _________ _________ _________public Kinder(int x) {_________ _________ _________ ____________________() ;}}Fragments: Use the following fragments zero or more times:8. Given:1. class Plant {2. String getName() { return "plant"; }3. Plant getType() { return this; }4. }5. class Flower extends Plant {6. // insert code here7. }8. class Tulip extends Flower {}Which statement(s), inserted at line 6, will compile? (Choose all that apply.)A.Flower getType() { return this; }B.String getType() { return "this"; }C.Plant getType() { return this; }D.Tulip getType() { return new Tulip() ;}9. Given:1. class Zing {2. protected Hmpf h;3. }4. class Woop extends Zing { }5. class Hmpf { }Which is true? (Choose all that apply.)A.Woop is-a Hmpf and has-a zing.B.zing is-a Woop and has-a Hmpf.C.Hmpf has-a Woop and Woop is-a Zing.D.Woop has-a Hmpf and Woop is-a zing.E.Zing has-a Hmpf and Zing is-a Woop.10. Given:1. class Programmer {2. Programmer debug() { return this; }3. }4. class SCJP extends Programmer {5. // insert code here6. }Which, inserted at line 5, will compile? (Choose all that apply.)A.Programmer debug() { return this; }B.SCJP debug() { return this; }C.Object debug() { return this; }D.int debug() { return 1; }E.int debug(int x) { return 1; }F.Object debug (int x) { return this; }11. Given:class Uber {static int y = 2;Uber(int x) { this(); y = y * 2; }Uber() { y++; }}class Minor extends Uber {Minor() { super(y); y = y + 3; }public static void main(String [] args) {new Minor();System.out.println(y);} }What is the result?A. 6B.7C.8D.9pilation fails.F.An exception is thrown.12. Which statement(s) are true? (Choose all that apply.)A.Cohesion is the OO principle most closely associated withhiding implementation details.B.Cohesion is the OO principle most closely associated withmaking sure that classes know about other classes onlythrough their APIs.C.Cohesion is the OO principle most closely associated withmaking sure that a class is designed with a single,well-focused purpose.D.Cohesion is the OO principle most closely associated withallowing a single object to be seen as having many types.13. Given:1. class Dog { }2. class Beagle extends Dog { }3.4. class Kennel {5. public static void main(String [] arfs) {6. Beagle bl = new Beagle();7. Dog dogl = new Dog();8. Dog dog2 = bl;9. // insert code here10. } }Which, inserted at line 9, will compile? (Choose all that apply.)A.Beagle b2 = (Beagle) dog1;B.Beagle b3 = (Beagle) dog2;C.Beagle b4 = dog2;D.None of the above statements will compile.14. Given the following,1. class X { void dol() { } }2. class Y extends X { void do2() { } }3.4. class Chrome {5. public static void main(String [] args) {6. X x1 = new X();7. X x2 = new Y();8. Y y1 = new Y();9. // insert code here10. } }Which, inserted at line 9, will compile? (Choose all that apply.)A.x2.do2( );B.(Y) x2. do2( );C.((Y)x2).do2();D.None of the above statements will compile.Answers1.☑B is correct.☒A and D describe other OO topics, C is incorrect because a class can have an instance of , itself. E is incorrect because whilehas-a relationships can lead to tight coupling, it is by no meansalways the case.(Objective 5.5).2.☑E is correct. final methods cannot be overridden.☒A, B, C,and D are incorrect based on the above. (Objective 5.3) 3.☑B is correct, an abstract class need not implement any or all ofan interface's methods. E is correct, the class implements theinterface method and additionally overloads the twiddle()method.☒A is incorrect because abstract methods have no body. C is incorrect because classes implement interfaces they don't extendthem. D is incorrect because overloading a method is notimplementing it.(Objective 5.4)4.☑E is correct. The implied super() call in Bottom2's constructorcannot be satisfied because there isn't a no-arg constructor inTop. A default, no-arg constructor is generated by the compileronly if the class has no constructor defined explicitly.☒A, B, C, and D are incorrect based "on the above.(Objective 1.6)5.☑E and F are correct. Only having access to a small number ofmethods implies limited coupling. If the access is via a referenceof interface type, it may be argued that there is even less,opportunity for coupling as the class type itself is not visible.Stating that changes in one part of a program are unlikely to causeconsequences in another part is really the essence of lowcoupling. There is no such thing as an anonymous variable.Referring to only a small number of other objects might imply lowcoupling, but if each object has many methods, and all are used,then coupling is high. Variables (attributes) in a class shouldusually be private, but this describes encapsulation, rather thanlow coupling. Of course, good encapsulation tends to reducecoupling as a consequence.☒A, B, C and D are incorrect based on the preceding treatise.(Objective 5.1)6.☑A is correct. Although a final method cannot be overridden, inthis case, the method is private, and therefore hidden. The effectis that a new, accessible, method flipper is created. Therefore,no polymorphism occurs in this example, the method invoked issimply that of the child class, and no error occurs.☒B, C, D, and E are incorrect based on the preceding.(Objective 5.3)7.class AgedP {AgedP() {}public AgedP(int x) {}}public class Kinder extends AgedP {public Kinder(int x)super();}}As there is no droppable tile for the variable x and the parentheses (in the Kinder constructor), are already in place and empty, there is no way to construct a call to the superclass constructor that takes an argument. Therefore, the only remaining possibility is to createa call to the no-argument superclass constructor. This is done as:super();. The line cannot be left blank, as the parentheses are already in place. Further, since the superclass constructor called is the no-argument version, this constructor must be created. It will not be created by the compiler because there is another constructor already present.(Objective 5.4) .8.☑A, C, and D are correct. A and D are examples of co-variantreturns, i.e., Flower and Tulip are both subtypes of Plant.☒B is incorrect, String is not a subtype of Plant.(Objective 1.5)9.☑D is correct, Woop inherits a Hmpf from Zing.☒A, B, C, and E are incorrect based on the preceding.(Objective 5.5)10.☑A, B, E, and F are correct. A and B are:examples of overriding,specifically, B is an example of overriding using a covariantreturn. E and F are examples of overloading.☒C and D are incorrect. They are illegal overrides because their return types are incompatible. They are illegal overloads becausetheir arguments did not change.(Objective 5.4)11.☑D is correct. Minor's constructor makes an explicit call to Uber's1-arg constructor, which makes an explicit (this) call to Uber'sno-arg constructor, which increments y, then returns to the 1-argconstructor, which multiples y * 2, and then returns to Minor'sconstructor, which adds 3 to y.☒A, B, C, E, and F are incorrect based on the preceding.(Objective 1.6)12.☑A nswer C is correct.☒A refers to encapsulation, B refers to coupling, and D refers to polymorphism.(Objective 5.1)13.☑A and B are,correct. However, at runtime, A will throw aclaasCastExcepfcion, because dog1 refers to a Dog object, whichcan't necessarily do Beagle stuff.☒C and D are incorrect based on the preceding.(Objective 5.2).14.☑C is correct. Before you can invoke Y's do2 method you have tocast x2 to be of type Y. Statement B looks like a proper cast butwithout the second set of parentheses, the compiler thinks it'san incomplete statement.☒A, B and D are incorrect based on the preceding.(Objective 5.2)Self Test 31. Given:class Scoop {static int thrower() throws Exception { return 42; }public static void main(String [] args) {try {int x = thrower();} catch (Exception e) {X++;} finally {System.out.printIn("x = " + ++x);} } }What is the result?A.x = 42B.x = 43C.x = 44pilation fails.E.The code runs with no output.2. Given:class CardBoard {Short story = 5;CardBoard go(CardBoard cb) {cb = null;return cb;}public static void main(String[] args) {CardBoard c1 = new CardBoard();CardBoard c2 = new CardBoard();CardBoard c3 = c1.go(c2);c1 = null;// do Stuff} }When // doStuff is reached, how many objects are eligible for GC?A.0B. 1C. 2pilation fails.E.It is not possible to know.F.An exception is thrown at runtime.3. Given:class Alien {String invade(short ships) { return "a few"; }String invade(short... ships) { return "many"; }}class Defender {public static void main(String [] args) {System.out.println(new Alien().invade(7));}}What is the result?A.manyB. a fewpilation fails.D.The output is not predictable.E.An exception is thrown at runtime.4. Given:1. class Dims {2. public static void main(String[] args) {3. int[] [] a = {{1,2,}, {3,4}};4. int [] b = (int [] ) a [1] ;5. Object o1 = a;6. int [] [] a2 = (int[] [] ) o1;7. int [] b2 = (int []) o1;8. System.out.println(b[1]);9. } }What is the result?A. 2B. 4C.An exception is thrown at runtime.pilation fails due to an error on line 4.pilation fails due to an error on line 5.pilation fails due to an error on line 6.pilation fails due to an error on line 7.5. Given:class Eggs {int doX(Long x, Long y) { return 1; }int doX(long... x) { return 2; }int doX(Integer x, Integer y) { return 3; }int doX(Number n, Number m) { return 4; }public static void main(String[] args) {new Eggs().go();}void go () {short s = 7;System.out.print(doX(s,s) + " ");System.out.println(doX(7,7));} }What is the result?A. 1 1B. 2 1C. 3 1D. 4 1E. 2 3F. 3 3G. 4 36. Given:class Mixer {Mixer() { }Mixer(Mixer m) { ml = m;}Mixer m1;public static void main(String[] args) { Mixer m2 = new Mixer();Mixer m3 = new Mixer(m2); m3.go();Mixer m4 = m3.m1; m4.go();Mixer m5 = m2.m1; m5.go();}void go() { System.out.print("hi "); }}What is the result?A.hiB.hi hiC.hi hi hipilation failsE.hi, followed by an exceptionF.hi hi, followed by an exception7. Given:1. class Zippy {2. String[] x;3. int[] a [] = {{1,2}, {l}};4. Object c = new long [4] ;5. Object[] d = x;6. }What is the result?pilation succeeds.pilation fails due only to an error on line 3.pilation fails due only to an error on line 4.pilation fails due only to an error on line 5.pilation fails due to errors on lines 3 and 5.pilation fails due to errors on lines 3, 4, and 5.8. Given:class Fizz {int x = 5;public static void main(String[] args) {final Fizz f1 = new Fizz();Fizz f2 = new Fizz();Fizz f3 = FizzSwitch(f1,f2);System.out.println((f1 == f3) + " " + (f1.x == f3.x));}static Fizz FizzSwitch(Fizz x, Fizz y) {final Fizz z = x;z.x = 6;return z;} }What is the result?A.true trueB.false trueC.true falseD.false falsepilation fails.F.An exception is thrown at runtime.9. Given:class Knowing {static final long tooth = 343L;static long doIt(long tooth) {System.out.print(++tooth + " ");return ++tooth;}public static void main(String[] args) {System.out.print(tooth + " ");final long tooth = 340L;new Knowing().doIt(tooth);System.out.println(tooth);}}What is the result?A.343 340 340B.343 340 342C.343 341 342D.343 341 340E.343 341 343pilation fails.G.An exception is thrown at runtime.10. Which is true? (Choose all that apply.)A.The invocation of an object's finalize() method is alwaysthe last thing that happens before an object is garbagecollected (GCed).B.When a stack variable goes out of scope it is eligible forGC.C.Some reference variables live on the stack, and some liveon the heap.D.Only objects that have no reference variables referringto them can be eligible for GC.E.It's possible to request the GC via methods in either java.lang. Runtime or ng.System classes.11. Given:1. class Convert {2. public static void main(String[] args) {3. Long xL = new Long(456L);4. long x1 = Long.valueOf("123");5. Long x2 = Long.valueOf("123");6. long x3 = xL.longValue();7. Long x4 = xL.longValue();8. Long x5 = Long.parseLong("456");9. long x6 = Long.parseLong("123");10. }11. }Which will compile using Java 5, but will NOT compile using Java1.4? (Choose all that apply.)A.Line 4B.Line 5C.Line 6D.Line 7E.Line 8F.Line 912. Given:1. class Eco {2. public static void main(String[] args) {3. Eco e1 = new Eco();4. Eco e2 = new Eco();5. Eco e3 = new Eco();6. e3.e = e2;7. e1.e = e3;8. e2 = null;9. e3 = null;10. e2.e = el;11. e1 = null;12. }13. Eco e;14. }At what point is only a single object eligible for GC?A.After line 8 runs.B.After line 9 runs.C.After line 10 runs.D.After line 11 runs.pilation fails.F.Never in this program.G.An exception is thrown at runtime.13. Given:1. class Bigger {2. public static void main(String[] args) {3. // insert code here4. }5. }6. class Better {7. enum Faster {Higher, Longer};8. }Which, inserted independently at line 3, will compile? (Choose all that apply.)A.Faster f = Faster.Higher;B.Faster f = Better.Faster.Higher;C.Better.Faster f = Better.Faster.Higher;D.Bigger.Faster f = Bigger.Faster.Higher;E.Better. Faster f2; f2 = Better.Faster.Longer;F.Better b; b.Faster = f3; f3 = Better.Faster.Longer;14. Given:class Bird {{ System.out.print("bl "); }public Bird() { System.out.print("b2 "); }}class Raptor extends Bird {static { System.out.print("r1 "); }public Raptor() { System.out.print("r2 "); }{ System.out.print("r3 "); }static { System.out.print("r4 "); }}class Hawk extends Raptor {public static void main(String[] args) {System.out.print("pre ");new Hawk();System.out.println("hawk ");}}What is the result?A.pre b1 b2 r3 r2 hawkB.pre b2 b1 r2 r3 hawkC.pre b2 b1 r2 r3 hawk r1 r4D.r1 r4 pre b1 b2 r3 r2 hawkE.r1 r4 pre b2 b1 r2 r3 hawkF.pre r1 r4 b1 b2 r3 r2 hawkG.pre r1 r4 b2 b1 r2 r3 hawkH.The order of output cannot be predicted.pilation fails.Answers1.☑D is correct, the variable x is only in scope within the try codeblock, it's not in scope in the catch or finally blocks. (For theexam, get used to those horrible closing } } } .) ☒A, B, C,and E are incorrect based on the above. (Objective 1.3) 2.☑C is correct. Only one CardBoard object (c1) is eligible, but ithas an associated Short wrapper object that is also eligible.☒A, B, D, E, and F are incorrect based on the above. (Objective 7-4)3.☑C is correct, compilation fails. The var-args declaration isfine, but invade takes a short, so the argument 7 needs to be castto a short. With the cast, the answer is B, 'a few'.☒A, B, D,and E are incorrect based on the above. (Objective 1.3) 4.☑C is correct. A ClassCastException is thrown at line 7 becauseo1 refers to an int [] [] not an int []. If line 7 was removed,the output would be 4.☒A, B, D, E, F,and G are incorrect based on the above. (Objective1.3)5.☑G is correct. Two rules apply to the first invocation of dox().You can't widen and then box in one step, and var-args are alwayschosen last. Therefore you can't widen shorts to either ints orlongs, and then box them to Integers.or Longs. But you can boxshorts to Shorts and then widen them to Numbers, and this takespriority over using a var-args method. The second invocation usesa simple box from int to Integer.☒A, B, C, D, E,and F are incorrect based on the above, (Objective3.1)6.☑F is correct. The m2 object's m1 instance variable is neverinitialized, so when m5 tries to use it a NullPointerExceptionis thrown.☒A, B, C, D, and E are incorrect based on the above. (Objective7.3)7.☑A is correct, all of these array declarations are legal. Lines4 and5 demonstrate that arrays can be cast.☒B, C, D, E, and F are incorrect because this code compiles.(Objective 1.3)8.☑A is correct. The references f1, z, and f3 all refer to the sameinstance of Fizz. The final modifier assures that a referencevariable cannot be referred to a different object, but finaldoesn't keep the object's state from changing.☒B,C, D, E,and F are incorrect based on the above. (Objective 7.3) 9.☑D is correct. There are three different long variables namedtooth. Remember that you can apply the final modifier to localvariables, but in this case the 2 versions of tooth marked finalare not changed. The only tooth whose value changes is the onenot marked final. This program demonstrates a bad practice knownas shadowing.☒A, B, C, E, F,and G are incorrect based on the above. (Objective7.3)10.☑C and E are correct. When an object has a reference variable, thereference variable lives inside the object, on the heap.☒A is incorrect, because if, the first time an object's finalize() method runs, the object is saved from the GC, then the second timethat object is about to be GCed, finalize() will not run. B isincorrect—stack variables are not dealt with by the GC. D isincorrect because objects can live in "islands of isolation" andbe GC eligible. (Objective 7.4)11.☑A, D, and E are correct. Because of the methods' return types,these method calls required autoboxing to compile.☒B, C, and F are incorrect based on the above. (Objective 3,1) 12.☑G is correct. An error at line 10 causes a NullPointerExceptionto be thrown because e2 was set to null in line 8, If line 10 wasmoved between lines 7 and 8, then F would be correct, because untilthe last reference is nulled none of the objects is eligible, andonce the last reference is nulled, all three are eligible.☒A, B, C, D, E, and F are incorrect based on the above. (Objective7.4)13.☑C and E are correct syntax for accessing an enum from anotherclass.☒A, B, D, and F are incorrect syntax. (Objective 1.3)14.☑D is correct. Static init blocks are executed at class loadingtime, instance init blocks run right after the call to super()in a constructor. When multiple init blocks of a single type occurin a class, they run in order, from the top down.☒A, B, C, E, F, G, H,and I are incorrect based on the above. Note: you'll probably never see this many choices on the real exam!(Objective 1.3)Self Test 4。