多项选择题

Given

Which two statements are true?()

A.Foo.beta() is a valid invocation of beta().
B.Foo.alpha() is a valid invocation of alpha().
C.Method beta() can directly call method alpha().
D.Method alpha() can directly call method beta().

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多项选择题
Given: 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?()

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

单项选择题
Given: What is the result?()

A.w-f
B.f-p w-f
C.w-f b-f
D.f-p w-f b-f

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