Oracle 1z0-809 Java SE 8 Programmer II Exam Practice Test

Given:

and the code fragment:

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 fragment:

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

LocalDate nextYear = valentinesDay.plusYears(1);

nextYear.plusDays(15); //line n1

System.out.println(nextYear);

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?

Given the code fragments:

interface CourseFilter extends Predicate {

public default boolean test (String str) {

return str.equals (“Java”);

}

}

and

List strs = Arrays.asList(“Java”, “Java EE”, “Java ME”);

Predicate cf1 = s - > s.length() > 3;

Predicate cf2 = new CourseFilter() { //line n1

public boolean test (String s) {

return s.contains (“Java”);

}

};

long c = strs.stream()

.filter(cf1)

.filter(cf2//line n2

.count();

System.out.println(c);

What is the result?

Given the content of the employee.txt file:

Every worker is a master.

Given that the employee.txt file is accessible and the file allemp.txt does NOT exist, and the code fragment:

What is the result?

Given the code fragment:

BiFunction val = (t1, t2) -> t1 + t2; //line n1

//line n2

System.out.println(val.apply(10, 10.5));

What is the result?

Given the code fragment:

Stream> iStr= Stream.of (

Arrays.asList (“1”, “John”),

Arrays.asList (“2”, null)0;

Stream< nInSt = iStr.flatMapToInt ((x) -> x.stream ());

nInSt.forEach (System.out :: print);

What is the result?

Given:

class Vehicle {

int vno;

String name;

public Vehicle (int vno, String name) {

this.vno = vno,;

this.name = name;

}

public String toString () {

return vno + “:” + name;

}

}

and this code fragment:

Set vehicles = new TreeSet <> ();

vehicles.add(new Vehicle (10123, “Ford”));

vehicles.add(new Vehicle (10124, “BMW”));

System.out.println(vehicles);

What is the result?

Given the code fragment:

List values = Arrays.asList (1, 2, 3);

values.stream ()

.map(n -> n*2)//line n1

.peek(System.out::print)//line n2

.count();

What is the result?

Given the code fragment:

What is the result?

Given:

Item table

• ID, INTEGER: PK

• DESCRIP, VARCHAR(100)

• PRICE, REAL

• QUANTITY< INTEGER

And given the code fragment:

9. try {

10.Connection conn = DriveManager.getConnection(dbURL, username, password);

11. String query = “Select * FROM Item WHERE ID = 110”;

12. Statement stmt = conn.createStatement();

13. ResultSet rs = stmt.executeQuery(query);

14.while(rs.next()) {

15.System.out.println(“ID:“ + rs.getInt(“Id”));

16.System.out.println(“Description:“ + rs.getString(“Descrip”));

17.System.out.println(“Price:“ + rs.getDouble(“Price”));

18. System.out.println(Quantity:“ + rs.getInt(“Quantity”));

19.}

20. } catch (SQLException se) {

21. System.out.println(“Error”);

22. }

Assume that:

The required database driver is configured in the classpath.

The appropriate database is accessible with the dbURL, userName, and passWord exists.

The SQL query is valid.

What is the result?

Given the code fragments:

and

What is the result?

Given the code fragment:

and the information:

• The required database driver is configured in the classpath.
• The appropriate database is accessible with the dbURL, username, and passWord exists.

What is the result?

Given:

final class Folder {//line n1

//line n2

public void open () {

System.out.print(“Open”);

}

}

public class Test {

public static void main (String [] args) throws Exception {

try (Folder f = new Folder()) {

f.open();

}

}

}

Which two modifications enable the code to print Open Close? (Choose two.)

Given the code fragment:

List list1 = Arrays.asList(10, 20);

List list2 = Arrays.asList(15, 30);

//line n1

Which code fragment, when inserted at line n1, prints 10 20 15 30?

Given the structure of the Student table:

Student (id INTEGER, name VARCHAR)

Given the records from the STUDENT table:

Given the code fragment:

Assume that:

What is the result?

Given the code fragments:

class MyThread implements Runnable {

private static AtomicInteger count = new AtomicInteger (0);

public void run () {

int x = count.incrementAndGet();

System.out.print (x+” “);

}

}

and

Thread thread1 = new Thread(new MyThread());

Thread thread2 = new Thread(new MyThread());

Thread thread3 = new Thread(new MyThread());

Thread [] ta = {thread1, thread2, thread3};

for (int x= 0; x < 3; x++) {

ta[x].start();

}

Which statement is true?

Given the code fragments:

and

What is the result?

Given the code fragment:

Which modification enables the code to print Price 5 New Price 4?

Given the content:

and given the code fragment:

Which two code fragments, when inserted at line 1 independently, enable the code to print “Wie geht’s?”

Given the code fragment:

Which code fragment, when inserted at line n1, ensures false is printed?

Given:

IntStream stream = IntStream.of (1,2,3);

IntFunction inFu= x -> y -> x*y;//line n1

IntStream newStream = stream.map(inFu.apply(10));//line n2

newStream.forEach(System.out::print);

Which modification enables the code fragment to compile?

Given the structure of the STUDENT table:

Student (id INTEGER, name VARCHAR)

Given:

public class Test {

static Connection newConnection =null;

public static Connection get DBConnection () throws SQLException {

try (Connection con = DriveManager.getConnection(URL, username, password)) {

newConnection = con;

}

return newConnection;

}

public static void main (String [] args) throws SQLException {

get DBConnection ();

Statement st = newConnection.createStatement();

st.executeUpdate(“INSERT INTO student VALUES (102, ‘Kelvin’)”);

}

}

Assume that:

The required database driver is configured in the classpath.

The appropriate database is accessible with the URL, userName, and passWord exists.

The SQL query is valid.

What is the result?

Given:

public class Counter {

public static void main (String[ ] args) {

int a = 10;

int b = -1;

assert (b >=1) : “Invalid Denominator”;

int с = a / b;

System.out.println (c);

}

}

What is the result of running the code with the –ea option?

Given:

and the code fragment:

What is the result?

Given the code fragment:

UnaryOperator uo1 = s -> s*2;line n1

List loanValues = Arrays.asList(1000.0, 2000.0);

loanValues.stream()

.filter(lv -> lv >= 1500)

.map(lv -> uo1.apply(lv))

.forEach(s -> System.out.print(s + “ “));

What is the result?

Given:

From what threading problem does the program suffer?

Given the definition of the Book class:

Which statement is true about the Book class?