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NEW QUESTION NO: 10
Given:
public interface Moveable<Integer> {
public default void walk (Integer distance) {System.out.println
( "Walking");)
public void run(Integer distance);
}
Which statement is true?
A. Moveablecan be used as below:
Moveable animal = (Integer n) - > System.out.println(n);
animal.run(100);
Moveable.walk(20);
B. Moveablecan be used as below:
Moveable<Integer> animal = n - > System.out.println("Running" + n);
animal.run(100);
animal.walk(20);
C. Moveablecan be used as below:
Moveable<Integer> animal = n - > n + 10;
animal.run(100);
animal.walk(20);
D. Movablecannot be used in a lambda expression.
Answer: C

NEW QUESTION NO: 11
Which statement is true about the DriverManagerclass?
A. It returns an instance of Connection.
B. it executes SQL statements against the database.
C. It only queries metadata of the database.
D. it is written by different vendors for their specific database.
Answer: A
Explanation/Reference:
Explanation: The DriverManager returns an instance of Doctrine\DBAL\Connection which is a wrapper around the underlying driver connection (which is often a PDO instance).
Reference: http://doctrine-dbal.readthedocs.org/en/latest/reference/configuration.html

NEW QUESTION NO: 12
Given:
class Sum extends RecursiveAction { //line n1
static final int THRESHOLD_SIZE = 3;
int stIndex, lstIndex;
int [ ] data;
public Sum (int [ ]data, int start, int end) {
this.data = data;
this stIndex = start;
this. lstIndex = end;
}
protected void compute ( ) {
int sum = 0;
if (lstIndex - stIndex <= THRESHOLD_SIZE) {
for (int i = stIndex; i < lstIndex; i++) {
sum += data [i];
}
System.out.println(sum);
} else {
new Sum (data, stIndex + THRESHOLD_SIZE, lstIndex).fork( );
new Sum (data, stIndex,
Math.min (lstIndex, stIndex + THRESHOLD_SIZE)
).compute ();
}
}
}
and the code fragment:
ForkJoinPool fjPool = new ForkJoinPool ( );
int data [ ] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
fjPool.invoke (new Sum (data, 0, data.length));
and given that the sum of all integers from 1 to 10 is 55.
Which statement is true?
A. The program prints 55.
B. A compilation error occurs at line n1.
C. The program prints several values whose sum exceeds 55.
D. The program prints several values that total 55.
Answer: B

NEW QUESTION NO: 13
Given the code fragment:
List<Integer> codes = Arrays.asList (10, 20);
UnaryOperator<Double> uo = s -> s +10.0;
codes.replaceAll(uo);
codes.forEach(c -> System.out.println(c));
What is the result?
A. A compilation error occurs.
B. 20.0
30.0
C. A NumberFormatExceptionis thrown at run time.
D. 10
Answer: B

NEW QUESTION NO: 14
For which three objects must a vendor provide implementations in its JDBC driver?
A. Time
B. Date
C. Statement
D. ResultSet
E. Connection
F. SQLException
G. DriverManager
Answer: C,D,E
Explanation/Reference:
Explanation: 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.

NEW QUESTION NO: 15
Given the code fragment:
public static void main (String [ ] args) throws IOException {
BufferedReader br = new BufferedReader (new InputStremReader (System.in)); System.out.print ("Enter GDP: ");
//line 1
}
Which code fragment, when inserted at line 1, enables the code to read the GDP from the user?
A. int GDP = Integer.parseInt (br.next());
B. int GDP = Integer.parseInt (br.readline());
C. int GDP = br.nextInt();
D. int GDP = br.read();
Answer: C

NEW QUESTION NO: 16
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<Vehicle> vehicles = new TreeSet <> ();
vehicles.add(new Vehicle (10123, "Ford"));
vehicles.add(new Vehicle (10124, "BMW"));
System.out.println(vehicles);
What is the result?
A. A ClassCastExceptionis thrown at run time.
B. A compilation error occurs.
C. 10124 BMW
1 0123 Ford
D. 10123 Ford
10124 BMW
Answer: C

NEW QUESTION NO: 17
Given the definition of the Empclass:
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:
List<Emp>li = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp ( "Jim", 51));
Predicate<Emp> agVal = s -> s.getEAge() > 50; //line n1
li = li.stream().filter(agVal).collect(Collectors.toList());
Stream<String> names = li.stream()map.(Emp::getEName); //line n2
names.forEach(n -> System.out.print(n + " "));
What is the result?
A. A compilation error occurs at line n2.
B. A compilation error occurs at line n1.
C. Sam John Jim
D. John Jim
Answer: C

NEW QUESTION NO: 18
Which two code blocks correctly initialize a Locale variable?
A. Locale loc3 = Locale.getLocaleFactory("RU");
B. Locale loc5 = new Locale ("ru", "RU");
C. Locale loc4 = Locale.UK;
D. Locale loc1 = "UK";
E. Locale loc2 = Locale.getInstance("ru");
Answer: B,C

NEW QUESTION NO: 19
Given:
public class Foo<K, V> {
private K key;
private V value;
public Foo (K key, V value) (this.key = key; this value = value;)
public static <T> Foo<T, T> twice (T value) (return new Foo<T, T> (value, value); )
public K getKey () (return key;)
public V getValue () (return value;)
}
Which option fails?
A. Foo<?, ?> percentage = new Foo <> (97, 32););
B. Foo<String, String> pair = Foo.<String>twice ("Hello World!");
C. Foo<String, String> grade = new Foo <> ("John", "A");
D. Foo<String, Integer> mark = new Foo<String, Integer> ("Steve", 100););
Answer: A

NEW QUESTION NO: 20
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. 12
B. A NullPointerExceptionis thrown at run time.
C. A compilation error occurs.
D. 1John2null
Answer: B