Oracle 1z0-809 Exam Dumps

Java SE 8 Programmer II

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Oracle 1z0-809 Sample Questions

Question # 1

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

A. It accepts one argument and returns void.
B. It accepts one argument and returns boolean.
C. It accepts one argument and always produces a result of the same type as the argument
D. It accepts an argument and produces a result of any data type. 

Answer: D

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Question # 2

Given the code fragment:Map<Integer, String> books = new TreeMap<>();books.put (1007, “A”);books.put (1002, “C”);books.put (1003, “B”);books.put (1003, “B”);System.out.println (books);What is the result?

A. {1007=A, 1003=B, 1002=C} 
B. {1007=A, 1003=B, 1003=B, 1002=C} 
C. {1007=A, 1002=C, 1003=B, 1003=B}  
D. {1002=C, 1003=B, 1007=A}

Answer: D

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Question # 3

Given the code fragment:9. Connection conn = DriveManager.getConnection(dbURL, userName, passWord);10. String query = “SELECT id FROM Employee”;11. try (Statement stmt = conn.createStatement()) {12. ResultSet rs = stmt.executeQuery(query);13.stmt.executeQuery(“SELECT id FROM Customer”);14. while (rs.next()) {15. //process the results16.System.out.println(“Employee ID: “+ rs.getInt(“id”));17.}Question No : 4Oracle 1z0-809 : Practice Test318. } catch (Exception e) {19. System.out.println (“Error”);20. }Assume that:The required database driver is configured in the classpath.The appropriate database is accessible with the dbURL, userName, and passWord exists.The Employee and Customer tables are available and each table has id column with a fewrecords and the SQL queries are valid.What is the result of compiling and executing this code fragment?

A. The program prints employee IDs. 
B. The program prints customer IDs.  
C. The program prints Error. 
D. compilation fails on line 13.

Answer: C

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Question # 4

Given the code fragment:Stream<List<String>> iStr= Stream.of (Arrays.asList (“1”, “John”),Arrays.asList (“2”, null)0;Stream<<String> nInSt = iStr.flatMapToInt ((x) -> x.stream ());nInSt.forEach (System.out :: print);What is the result?

A. 1John2null 
B. 12 
C. A NullPointerException is thrown at run time. 
D. A compilation error occurs. 

Answer: D

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Question # 5

Given:Item table• ID, INTEGER: PK• DESCRIP, VARCHAR(100)• PRICE, REAL• QUANTITY< INTEGERAnd 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?

A. An exception is thrown at runtime. 
B. Compilation fails. 
C. The code prints Error. 
D. The code prints information about Item 110. 

Answer: D

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Question # 6

Given the code fragment:ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 1, 0, 0, 0, ZoneID.of(“UTC-7”));ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of(“UTC-5”));long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1System.out.println(“Travel time is” + hrs + “hours”);What is the result?

A. Travel time is 4 hours 
B. Travel time is 6 hours 
C. Travel time is 8 hours 
D. An exception is thrown at line n1.

Answer: C

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Question # 7

Which action can be used to load a database driver by using JDBC3.0? 

A. Add the driver class to the META-INF/services folder of the JAR file.  
B. Include the JDBC driver class in a jdbc.properties file.  
C. Use the java.lang.Class.forName method to load the driver class.  
D. Use the DriverManager.getDriver method to load the driver class.  

Answer: Answer: C

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Question # 8

Given the code fragment:Path path1 = Paths.get(“/app/./sys/”);Path res1 = path1.resolve(“log”);Path path2 = Paths.get(“/server/exe/”);Path res1 = path2.resolve(“/readme/”);System.out.println(res1);System.out.println(res2);What is the result?

A. /app/sys/log/readme/server/exe 
B. /app/log/sys/server/exe/readme 
C. /app/./sys/log/readme 
D. /app/./sys/log/server/exe/readme 

Answer: D

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Question # 9

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? 

A. The program prints:Run RunnerCall Caller : nullAnd the program does not terminate.  
B. The program terminates after printing:Run RunnerCall Caller : Run  
C. A compilation error occurs at line n1.  
D. An Execution is thrown at run time.  

Answer: Answer: D

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Question # 10

Given:public class Emp {String fName;String lName;public Emp (String fn, String ln) {fName = fn;lName = ln;}public String getfName() { return fName; }public String getlName() { return lName; }}and the code fragment:List<Emp> emp = Arrays.asList (new Emp (“John”, “Smith”),new Emp (“Peter”, “Sam”),new Emp (“Thomas”, “Wale”));emp.stream()//line n1.collect(Collectors.toList());Which code fragment, when inserted at line n1, sorts the employees list in descendingorder of fName and then ascending order of lName?

A. .sorted(Comparator.comparing(Emp::getfName).reserved().thenComparing(Emp::getlName)) 
B. .sorted (Comparator.comparing(Emp::getfName).thenComparing(Emp::getlName)) 
C. .map(Emp::getfName).sorted(Comparator.reserveOrder()) 
D.map(Emp::getfName).sorted(Comparator.reserveOrder().map(Emp::getlName).reserved 

Answer: B

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