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NEW QUESTION # 110
Which two reasons should you use interfaces instead of abstract classes?
- A. You expect that classes that implement your interfaces have many common methods or fields, or require access modifiers other than public.
- B. You expect that unrelated classes would implement your interfaces.
- C. You want to declare non-static on non-final fields.
- D. You want to take advantage of multiple inheritance of type.
- E. You want to share code among several closely related classes.
Answer: A,D
Explanation:
Reference: http://www.programmerinterview.com/index.php/java-questions/interface-vsabstract-class/
NEW QUESTION # 111
Given:
What is the result?
- A. -finally--catch-
- B. -catch--finally--dostuff-
- C. -finally-dostuff--catch-
- D. -catch-
Answer: A
Explanation:
NEW QUESTION # 112
Given the code fragment:
List<String> empDetails = Arrays.asList("100, Robin, HR",
"200, Mary, AdminServices",
"101, Peter, HR");
empDetails.stream()
.filter(s-> s.contains("1"))
.sorted()
.forEach(System.out::println); //line n1
What is the result?
- A. 100, Robin, HR101, Peter, HR
- B. 100, Robin, HR101, Peter, HR200, Mary, AdminServices
- C. E. A compilation error occurs at line n1.
- D. 100, Robin, HR200, Mary, AdminServices101, Peter, HR
Answer: A
NEW QUESTION # 113
Given the code fragment:
What is the result?
- A. A compilation error occurs at line n1.
- B.
- C. A compilation error occurs at line n2.
3 - D. 0
Answer: C
NEW QUESTION # 114
Given the content of /resourses/Message.properties:
welcome1="Good day!"
and given the code fragment:
Properties prop = new Properties ();
FileInputStream fis = new FileInputStream ("/resources/Message.properties"); prop.load(fis); System.out.println(prop.getProperty("welcome1")); System.out.println(prop.getProperty("welcome2", "Test"));//line n1 System.out.println(prop.getProperty("welcome3")); What is the result?
Good day!
- A. A compilation error occurs at line n1.
- B. Test
null - C. followed by an Exceptionstack trace
Good day! - D. Test
followed by an Exceptionstack trace
Good day!
Answer: B
NEW QUESTION # 115
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. Movable cannot be used in a lambda expression.
- B. Moveable can be used as below:Moveable<Integer> animal = n - > n +
10;animal.run(100);animal.walk(20); - C. Moveable can be used as below:Moveable<Integer> animal = n - > System.out.println("Running" + n);animal.run(100);animal.walk(20);
- D. Moveable can be used as below:Moveable animal = (Integer n) - >
System.out.println(n);animal.run(100);Moveable.walk(20);
Answer: C
NEW QUESTION # 116
Given that these files exist and are accessible:
and given the code fragment:
Which code fragment can be inserted at line n1to enable the code to print only /company/emp?
Stream<Path> stream = Files.list (Paths.get (“/company”));
- A. Stream<Path> stream = Files.walk (Paths.get (“/company”));
- B. Paths.get (“/company”), 1,
(p,b) –> b.isDirectory (), FileVisitOption.FOLLOW_LINKS); - C. Stream<Path> stream = Files.find(
- D. Stream<Path> stream = Files.list (Paths.get (“/company/emp”));
Answer: B
NEW QUESTION # 117
Which statement is true about the DriverManager class?
- A. It only queries metadata of the database.
- B. it executes SQL statements against the database.
- C. It returns an instance of Connection.
- D. it is written by different vendors for their specific database.
Answer: C
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).
http://doctrine-dbal.readthedocs.org/en/latest/reference/configuration.html
NEW QUESTION # 118
Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + ":" + name + ":" + city;
}
and the code fragment:
List<Student> stds = Arrays.asList(
new Student ("Jessy", "Java ME", "Chicago"),
new Student ("Helen", "Java EE", "Houston"),
new Student ("Mark", "Java ME", "Chicago"));
stds.stream()
.collect(Collectors.groupingBy(Student::getCourse))
.forEach(src, res) -> System.out.println(scr));
What is the result?
- A. Java EE
Java ME - B. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
[Java EE: Helen:Houston] - C. A compilation error occurs.
- D. [Java EE: Helen:Houston]
[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
Answer: A
NEW QUESTION # 119
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?
- A. The program prints Status: true and two records are deleted from the Student table.
- B. The program prints Status: false but the records from the Student table are not deleted.
- C. A SQLException is thrown at runtime.
- D. The program prints Status: false and two records are deleted from the Student table.
Answer: D
NEW QUESTION # 120
Given:
Your design requires that:
* fuelLevel of Engine must be greater than zero when the start() method is invoked.
* The code must terminate if fuelLevel of Engine is less than or equal to zero.
Which code fragment should be added at line n1 to express this invariant condition?
- A. assert fuelLevel > 0: "Impossible fuel" ;
- B. assert (fuelLevel > 0) : System.out.println ("Impossible fuel");
- C. assert (fuelLevel) : "Terminating...";
- D. assert fuelLevel < 0: System.exit(0);
Answer: D
NEW QUESTION # 121
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?
- A. The program executes successfully and the STUDENT table is updated with one record.
- B. A NullPointerException is thrown as runtime.
- C. A SQLException is thrown as runtime.
- D. The program executes successfully and the STUDENT table is NOT updated with any record.
Answer: B
NEW QUESTION # 122
Given the code fragment:
List<String> listVal = Arrays.asList("Joe", "Paul", "Alice", "Tom");
System.out.println (
// line n1
);
Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?
- A. listVal.stream().peek(x -> x.length()>3).count().get()
- B. listVal.stream().filter(x -> x.length()>3).mapToInt(x -> x).count()
- C. listVal.stream().filter(x -> x.length()>3).count()
- D. listVal.stream().map(x -> x.length()>3).count()
Answer: A
NEW QUESTION # 123
Given the code fragment:
What is the result?
- A. A compilation error occurs at line n1.
- B. The code reads the password without echoing characters on the console.
- C. A compilation error occurs at line n2.
- D. A compilation error occurs because the IOException isn't declared to be thrown or caught?
Answer: D
NEW QUESTION # 124
Given the code fragment:
What is the result?
- A. Susan
Allen
[Susan, David] - B. Susan
Susan
[Susan, Allen] - C. Susan
Allen
[David] - D. David
Allen
[Susan] - E. David
David
[Susan, Allen]
Answer: C
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION # 125
......
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