Oracle Oracle Certifications 1Z0-809 Questions & Answers

• Question 141:

  Given the definition of the Emp class:

  public class Emp

  private String eName;

  private Integer eAge;

  Emp(String eN, Integer eA) {

  this.eName = eN;

  this.eAge = eA;

  }

  public Integer getEAge () {return eAge;}

  public String getEName () {return eName;}

  }

  and code fragment:

  Listli = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp("Jim", 51));

  Predicate agVal = s -> s.getEAge() > 50; //line n1

  li = li.stream().filter(agVal).collect(Collectors.toList());

  Stream names = li.stream()map.(Emp::getEName); //line n2

  names.forEach(n -> System.out.print(n + " "));

  What is the result?

  A. Sam John Jim

  B. John Jim

  C. A compilation error occurs at line n1.

  D. A compilation error occurs at line n2.

  Correct Answer: B

• Question 142:

  For which three objects must a vendor provide implementations in its JDBC driver? (Choose three.)

  A. Time

  B. Date

  C. Statement

  D. ResultSet

  E. Connection

  F. SQLException

  G. DriverManager

  Correct Answer: CDE

  Database vendors support JDBC through the JDBC driver interface or through the ODBC connection. Each driver must provide implementations of java.sql.Connection, java.sql.Statement, java.sql.PreparedStatement, java.sql.CallableStatement, and java.sql.Re sultSet. They must also implement the java.sql.Driver interface for use by the generic java.sql.DriverManager interface.

• Question 143:

  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?

  A. 2016-02-14

  B. A DateTimeException is thrown.

  C. 2016-02-29

  D. A compilation error occurs at line n1.

  Correct Answer: A

• Question 144:

  Given the code fragment:

  BiFunction val = (t1, t2) -> t1 + t2; //line n1 System.out.println(val.apply(10, 10.5));

  What is the result?

  A. 20

  B. 20.5

  C. A compilation error occurs at line n1.

  D. A compilation error occurs at line n2.

  Correct Answer: C

• Question 145:

  Which statement is true about java.time.Duration?

  A. It tracks time zones.

  B. It preserves daylight saving time.

  C. It defines time-based values.

  D. It defines date-based values.

  Correct Answer: C

  Reference: http://tutorials.jenkov.com/java-date-time/duration.html#accessing-the-time-of-a-duration

• Question 146:

  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?

  A. 4000.0

  B. 4000

  C. A compilation error occurs at line n1.

  D. A compilation error occurs at line n2.

  Correct Answer: D

• Question 147:

  You have been asked to create a ResourceBundle which uses a properties file to localize an application. Which code example specifies valid keys of menu1 and menu2 with values of File Menu and View Menu?

  A. File Menu View Menu

  B. menu1File Menu menu2View Menu

  C. menu1, File Menu, menu2, View Menu Menu

  D. menu1 = File Menu menu2 = View Menu

  Correct Answer: D

• Question 148:

  Given the records from the Employee table:

  

  and given the code fragment:

  try {

  Connection conn = DriverManager.getConnection (URL, userName, passWord);

  Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,

  ResultSet.CONCUR_UPDATABLE);

  st.execute("SELECT*FROM Employee");

  ResultSet rs = st.getResultSet();

  while (rs.next()) {

  if (rs.getInt(1) ==112) {

  rs.updateString(2, "Jack");

  }

  }

  rs.absolute(2);

  System.out.println(rs.getInt(1) + " " + rs.getString(2));

  } catch (SQLException ex) {

  System.out.println("Exception is raised");

  }

  Assume that:

  The required database driver is configured in the classpath.

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

  What is the result?

  A. The Employee table is updated with the row: 112 Jack and the program prints: 112 Jerry

  B. The Employee table is updated with the row: 112 Jack and the program prints: 112 Jack

  C. The Employee table is not updated and the program prints: 112 Jerry

  D. The program prints Exception is raised.

  Correct Answer: C

• Question 149:

  Given:

  class RateOfInterest {

  public static void main (String[] args) {

  int rateOfInterest = 0;

  String accountType = "LOAN";

  switch (accountType) {

  case "RD";

  rateOfInterest = 5;

  break;

  case "FD";

  rateOfInterest = 10;

  break;

  default: assert false: "No interest for this account"; //line n1 } System.out.println ("Rate of interest:" + rateOfInterest); } }

  and the command:

  java -ea RateOfInterest

  What is the result?

  A. Rate of interest: 0

  B. An AssertionError is thrown.

  C. No interest for this account

  D. A compilation error occurs at line n1.

  Correct Answer: B

• Question 150:

  Given the code fragment:

  class CallerThread implements Callable {

  String str;

  public CallerThread(String s) {this.str=s;}

  public String call() throws Exception {

  return str.concat("Call");

  }

  }

  and

  public static void main (String[] args) throws InterruptedException, ExecutionException

  {

  ExecutorService es = Executors.newFixedThreadPool(4); //line n1

  Future f1 = es.submit (newCallerThread("Call"));

  String str = f1.get().toString();

  System.out.println(str);

  }

  Which statement is true?

  A. The program prints Call Call and terminates.

  B. The program prints Call Call and does not terminate.

  C. A compilation error occurs at line n1.

  D. An ExecutionException is thrown at run time.

  Correct Answer: B