To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) furry bray - This option is the correct answer. The code creates an instance of the ZooKeeper
class and calls the go()
method. Inside the go()
method, a new Zebra
object is created and assigned to a Mammal
reference variable m
. When we call m.name
, it refers to the name
variable in the Mammal
class, which is "furry". When we call m.makeNoise()
, it invokes the makeNoise()
method in the Zebra
class, which returns "bray". Therefore, the output will be "furry bray".
Option B) stripes bray - This option is incorrect because m.name
refers to the name
variable in the Mammal
class, which is "furry", not "stripes".
Option C) furry generic noise - This option is incorrect because m.makeNoise()
invokes the makeNoise()
method in the Zebra
class, which returns "bray", not "generic noise".
Option D) stripes generic noise - This option is incorrect because m.name
refers to the name
variable in the Mammal
class, which is "furry", not "stripes". Additionally, m.makeNoise()
invokes the makeNoise()
method in the Zebra
class, which returns "bray", not "generic noise".
Option E) Compilation fails - This option is incorrect. The code compiles successfully without any compilation errors.
Option F) An exception is thrown at runtime - This option is incorrect. The code does not throw any exceptions at runtime.
The correct answer is Option A) furry bray. This option is correct because it correctly represents the output of the code snippet.