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NO.1 Given the code fragments:
class Caller implements Callable<String>
{
String str;
public Caller (String s) {this.str=s;}
public String
call()throws Exception { return str.concat ("Caller");}
}
class Runner
implements Runnable {
String str;
public Runner (String s)
{this.str=s;}
public void run () { System.out.println (str.concat
("Runner"));}
}
and
public static void main (String[] args)
InterruptedException, ExecutionException {
ExecutorService es =
Executors.newFixedThreadPool(2);
Future f1 = es.submit (new Caller
("Call"));
Future f2 = es.submit (new Runner ("Run"));
String str1 =
(String) f1.get();
String str2 = (String) f2.get();//line
n1
System.out.println(str1+ ":" + str2);
}
What is the result?
A.
The program terminates after printing:
Run Runner
Call Caller : Run
B.
An Execution is thrown at run time.
C. The program prints:
Run
Runner
Call Caller : null
And the program does not terminate.
D. A
compilation error occurs at line n1.
Answer: C
1z0-809 Real
Questions
NO.2 Given the content of
/resourses/Message.properties:
welcome1="Good day!"
and given the code
fragment:
Properties prop = new Properties ();
FileInputStream fis = new
FileInputStream
("/resources/Message.properties");
prop.load(fis);
System.out.println(prop.getProperty("welcome1"));
System.out.println(prop.getProperty("welcome2",
"Test"));//line n1
System.out.println(prop.getProperty("welcome3"));
What
is the result?
A. Good day!
followed by an Exception stack trace
B.
Good day!
Test
null
C. Good day!
Test
followed by an Exception
stack trace
D. A compilation error occurs at line n1.
Answer: D
1z0-809
test
NO.3 Given:
class UserException extends Exception {
}
class AgeOutOfLimitException extends UserException { }
and the code
fragment:
class App {
public void doRegister(String name, int
age)
throws UserException, AgeOutOfLimitException {
if (name.length ()
< 6) {
throw new UserException ();
} else if (age >= 60) {
throw
new AgeOutOfLimitException ();
} else {
System.out.println("User is
registered.");
}
}
public static void main(String[ ] args) throws
UserException {
App t = new App ();
t.doRegister("Mathew",
60);
}
}
What is the result?
A. A compilation error occurs in the
main method.
B. User is registered.
C. A UserException is thrown.
D. An
AgeOutOfLimitException is thrown.
Answer: B
1z0-809 Actual
Test
NO.4 Which three statements are benefits of
encapsulation?
A. Enables multiple instances of the same class to be created
safely
B. Allows a class implementation to change without changing t he
clients
C. Enables the class implementation to protect its invariants
D.
Prevents code from causing exceptions
E. Permits classes to be combined into
the same package
F. Protects confidential data from leaking out of the
objects
Answer: B,C,F
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