61 
If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile?
(A) add import animals. mammals.*; at line 2 in Salmon.java
(B) add import animals.fish.*; at line 2 in GrizzlyBearjava
(C) add import animals.fish.Salmon.*; at line 2 in GrizzlyBear.java
(D) add import animals. mammals.GrizzlyBear*; at line 2 in Salmon.java

57 What is the result? (A) Canada (B) null Canada (C) Canada null (D) Canada Canada (E) Compilation fails due to an error on line 26. (AB) Compilation fails due to an error on line 29.

58 Which code, inserted at line 16, will cause a java.lang.ClassCastException? (A) Alpha a = x; (B) Foo f = (Delta)x; (C) Foo f = (Alpha)x; (D) Beta b = (Beta)(Alpha)x;

59 Assume the current directory is bigProject, what it the result? (A) If the compile is successful, Utils.class is added to the source directory. (B) The compiler returns an invalid flag error. (C) If the compile is successful, Utils.class is added to the classes directory. (D) If the compile is successful, Utils.class is added to the bigProject directory.

複選題60 And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." (current directory). Which two java commands entered at the command line will run MainClass? (Choose two.) (A) java MainClass if run from the /apps directory (B) java com.company.application.MainClass if run from the /apps directory (C) java -classpath /apps com.company.application.MainClass if run from any directory (D) java-classpath . MainClass if run from the /apps/com/company/application directory (E) java -classpath /apps/com/company/application:. MainClass if run from the /apps directory (AB) java com.company.application.MainClass if run from the /apps/com/company/application directory

62 What is the result? (A) b 3 (B) b 8 (C) b 13 (D) f 3 (E) f 8 (AB) f 13 (AC) Compilation fails, (AD) An exception is thrown at runtime.

63 Which three are valid? (Choose three.)  1. p0 = p1;  2. p1 = p2,  3. p2 = p4;  4. p2 = (ClassC)p1;  5. p1 = (ClassB)p3;  6. p2 = (ClassC)p4; (A) 123 (B) 126 (C) 235 (D) 156

66 Which two are true? (Choose two.)  1. The output is mm.  2. The output is mc.  3. Component is-a Meter.  4. Component has-a Meter. 5. DeluxeThingy is-a Component.  6. DeluxeThingy has-a Component. (A) 16 (B) 34 (C) 12 (D) 56

複選題67 Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.) (A) double getSalesAmount() { return 1230.45; } (B) public double getSalesAmount() { return 1230.45; } (C) private double getSalesAmount() { return 1230.45; } (D) protected double getSalesAmount() { return 1230.45; }

68 How many of these method names follow JavaBean Listener naming rules? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

複選題69 Which three are valid on line 12? (Choose three.) (A) final (B) static (C) native (D) public (E) private (AB) abstract (AC) protected