Java OCA OCP Practice Question 2833

Question

Given the following two files containing Main.java and Square.java: 

2. package ec.mypkg;  
3. public class Main{}  
4. class Shape{}  
 
2. package ec.mypkg;  
3. public class Square{}  
4. class Rectangle{}

And if those files are located in the following directory structure: 

$ROOT  
  |-- Main.java  
  |-- Square.java  
  |-- checker  
          |-- dira  
          |-- dirb

And the following commands are executed, in order, from the ROOT directory: 

javac Main.java -cp checker/dira -d checker/dirb  
javac Square.java -cp checker/dirb -d checker/dira  
jar -cf checker/dira/a.jar checker

A new JAR file is created after executing the above commands.

Which of the following files will exist inside that JAR file? (Choose all that apply.). 

A.   [JAR]/dira/ec/mypkg/Rectangle.class
B.   [JAR]/checker/dirb/ec/mypkg/Shape.class
C.   [JAR]/dirb/ec/mypkg/Rectangle.class
D.   [JAR]/checker/dira/ec/mypkg/Shape.class
E.   [JAR]/dira/a.jar
F.   [JAR]/checker/dira/a.jar



B is correct.

Note

When using the jar command with -cf switches, the given source directory will be copied to the JAR file together with its subdirectories and files.

D is incorrect because the -d switch is used to specify the destination directory, so there will be no impact on the classpath directory during compilation or JAR file creation.

F is incorrect because there was NO such JAR file before the creation of the new JAR file.

A, C, and E are incorrect based on the above.




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