How to Pass the Oracle 1z0-809 Exam: Comprehensive Java SE 8 Programmer II Guide and Tips

Given the records from the STUDENT table:

Given the code fragment:

Assume that the URL, username, and password are valid.

What is the result?

Given:

Which two interfaces can you use to create lambda expressions? (Choose two.)

Given the code fragment:

List nums = Arrays.asList (10, 20, 8):

System.out.println (

//line n1

);

Which code fragment must be inserted at line n1 to enable the code to print the maximum number in the nums list?

Given the code fragment:

public class Foo {

public static void main (String [ ] args) {

Map unsortMap = new HashMap< > ( );

unsortMap.put (10, “z”);

unsortMap.put (5, “b”);

unsortMap.put (1, “d”);

unsortMap.put (7, “e”);

unsortMap.put (50, “j”);

Map treeMap = new TreeMap (new

Comparator ( ) {

@Override public int compare (Integer o1, Integer o2) {return o2.compareTo

(o1); } } );

treeMap.putAll (unsortMap);

for (Map.Entry entry : treeMap.entrySet () ) {

System.out.print (entry.getValue () + “ “);

}

}

}

What is the result?

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?

Which statement is true about the single abstract method of the java.util.function.Function interface?

Given the code fragment:

LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);

LocalDate next15days = valentinesDay.plusDays (15);

LocalDate nextYear = next15days.plusYears(1); // line n1

System.out.println(nextYear);

What is the result?

Given:

class Book {

int id;

String name;

public Book (int id, String name) {

this.id = id;

this.name = name;

}

public boolean equals (Object obj) { //line n1

boolean output = false;

Book b = (Book) obj;

if (this.id = = b.id) {

output = true;

}

return output;

}

}

and the code fragment:

Book b1 = new Book (101, “Java Programing”);

Book b2 = new Book (102, “Java Programing”);

System.out.println (b1.equals(b2)); //line n2

Which statement is true?

Given the code fragments:

class Caller implements Callable {

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) throws 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?

Given that these files exist and are accessible:

/sports/info.txt

/sports/cricket/players.txt

/sports/cricket/data/ODI.txt

and given the code fragment:

int maxDepth =2;

Stream paths = Files.find(Paths.get(“/sports”),

maxDepth,

(p, a) -> p.getFileName().toString().endsWith (“txt”),

FileVisitOption.FOLLOW_LINKS);

Long fCount = paths.count();

System.out.println(fCount);

Assuming that there are NO soft-link/symbolic links to any of the files in the directory structure, what is the result?