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Question ID 3891

Given:
11.    public static void test(String str) {
12.    int check = 4;
13.    if (check = str.length()) {
14.    System.out.print(str.charAt(check -= 1) +", ");
15.    } else {
16.    System.out.print(str.charAt(0) + ", ");
17.    }
18.    } and the invocation: 21. test("four");
22.    test("tee");
23.    test("to"); What is the result?
 

Option A

A.    r, t, t,
 

Option B

B.    r, e, o,
 

Option C

C.    Compilation fails.
 

Option D

D.    An exception is thrown at runtime.
 

Correct Answer C
Explanation


Question ID 3892

A developer is creating a class Book, that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three, taken independently, will allow the developer to use the Paper class while compiling the Book class? (Choose three.)
 

Option A

A.    The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.
 

Option B

B.    The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..
 

Option C

C.    The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.
 

Option D

D.    The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.
 

Option E

E.    The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -cp /foo/myLib.jar/Paper Book.java.
 

Option F

F.    The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -classpath /foo/myLib.jar Book.java

 

Correct Answer B,D,F
Explanation

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