최신 1z1-809 무료덤프 - Oracle Java SE 8 Programmer II

문제1

Given:

and the code fragment:

What is the result?

A. A compilation error occurs at line n1.

B. 0

C. 2

D. An Exception is thrown at run time.

정답: A

문제2

Given the code fragment:

Assume that the value of now is 6:30 in the morning.
What is the result?

A. 1

B. 60

C. An exception is thrown at run time.

D. 0

정답: B

문제3

Given that /green.txt and /colors/yellow.txt are accessible, and the code fragment:
Path source = Paths.get("/green.txt);
Path target = Paths.get("/colors/yellow.txt);
Files.move(source, target, StandardCopyOption.ATOMIC_MOVE);
Files.delete(source);
Which statement is true?

A. The file green.txt is moved to the /colors directory.

B. A FileAlreadyExistsException is thrown at runtime.

C. The green.txt file content is replaced by the yellow.txt file content and the yellow.txt file is deleted.

D. The yellow.txt file content is replaced by the green.txt file content and an exception is thrown.

정답: B

문제4

Given:
public class Test<T> {
private T t;
public T get () {
return t;
}
public void set (T t) {
this.t = t;
}
public static void main (String args [ ] ) {
Test<String> type = new Test<>();
Test type 1 = new Test ();//line n1
type.set("Java");
type1.set(100);//line n2
System.out.print(type.get() + " " + type1.get());
}
}
What is the result?

A. A compilation error occurs. To rectify it, replace line n2 with:type1.set (Integer(100));

B. A compilation error occurs. To rectify it, replace line n1 with:Test<Integer> type1 = new Test<>();

C. Java 100

D. java.lang.string@<hashcode>java.lang.Integer@<hashcode>

정답: C

문제5

Which two methods from the java.util.stream.Stream interface perform a reduction operation? (Choose two.)

A. filter ()

B. distinct ()

C. collect ()

D. peek ()

E. count ()

정답: C,E

문제6

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?

A. allemp.txt is created and the content of employee.txt is copied to it.

B. Exception 2

C. Exception 1

D. The program executes, does NOT affect the system, and produces NO output.

정답: C

문제7

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 Jackand the program prints:112 Jack

B. The Employee table is updated with the row:112 Jackand the program prints:112 Jerry

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

D. The program prints Exception is raised.

정답: C

문제8

Given:

Which option fails?

A. Foo<Object, Object> percentage = new Foo<String, Integer>("Steve", 100);

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);

정답: D

문제9

Which two are elements of a singleton class? (Choose two.)

A. a transient reference to point to the single instance

B. a public method to instantiate the single instance

C. a public reference to point to the single instance

D. a private constructor to the class

E. a public static method to return a copy of the singleton reference

정답: B,D

문제10

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;
}
public String getCourse() {return course;}
public String getName() {return name;}
public String getCity() {return 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(res));
What is the result?

A. Java EEJava ME

B. A compilation error occurs.

C. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago][Java EE: Helen:Houston]

D. [Java EE: Helen:Houston][Java ME: Jessy:Chicago, Java ME: Mark:Chicago]

정답: A

최신 1z1-809 무료덤프 - Oracle Java SE 8 Programmer II

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