1z1-811 無料問題集「Oracle Java Foundations」

（A）Messenger.writeMsg();

（B）m.writeMsg();

（C）void writeMsg();

（D）writeMsg();

（A）The code compiles and prints:
default

（B）The code fails to compile. To make it compile, at line n2 insert:
this ();

（C）The code fails to compile. To make it compile, at line n1 insert:
Bus () { }

（D）The code fails to compile. To make it compile, at line n1 insert:
this () { }

（A）only MyClassB, MyClassC, and MyClassD

（B）only MyClassB and MyClassD

（C）only MyClassB

（D）MyClassA, MyClassB, MyClassC, and MyClassD

（A）13

（B）12

（C）10

（D）11

（A）It contains the JDK and Java APIs.

（B）It is platform independent.

（C）It is responsible for garbage collection.

（D）It interprets bytecode stored in a .class file.

（E）You must install the JRE to compile a .java file.

（A）It cannot be defined in a non-public class.

（B）Its parameter can be of type Integer [].

（C）It can be a non-static method.

（D）It cannot be invoked by its name.

（A）10
10

（B）9
12

（C）10
14

（D）9
9

（A）System.out.printf("%s is %d years old", name, age);

（B）System.out.println("%s is %n years old" name, age);

（C）System.out.printf("%s is %n years old", name, age);

（D）System.out.println("%s is %d years old" +name+age);