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

문제1

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

A. It accepts one argument and returns void.

B. It accepts one argument and returns boolean.

C. It accepts an argument and produces a result of any data type.

D. It accepts one argument and always produces a result of the same type as the argument.

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제2

Given the code fragment:
UnaryOperator<Integer> uo1 = s -> s*2;line n1
List<Double> 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. A compilation error occurs at line n1.

B. 4000.0

C. A compilation error occurs at line n2.

D. 4000

정답: C

문제3

Given the code fragment:

Which modification enables the code to print Price 5 New Price 4?

A. Replace line n1 with .forEach (e -> System.out.print ("Price" + e))

B. Replace line n3 with .forEach (n -> System.out.println ("New Price" + n));

C. Replace line n2 with .map (n -> System.out.println ("New Price" + n -1)) and remove line n3

D. Replace line n2 with .mapToInt (n -> n - 1);

정답: B

문제4

Given the code fragments:

and

What is the result?

A. A compilation error occurs at line n1.

B. The program prints Run... and throws an exception.

C. Run...Call...

D. A compilation error occurs at line n2.

정답: C

문제5

Given the code fragment:
List<Integer> values = Arrays.asList (1, 2, 3);
values.stream ()
.map(n -> n*2)//line n1
.peek(System.out::print)//line n2
.count();
What is the result?

A. A compilation error occurs at line n1.

B. The code produces no output.

C. A compilation error occurs at line n2.

D. 246

정답: D

문제6

Given:

What is the result?

A. IT:null

B. A compilation error occurs.

C. A NullPointerException is thrown at run time.

D. IT:0.0

정답: D

문제7

Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () <= 60) {
throw new UserException ();
} else if (age > 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println("User is registered.");
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister("Mathew", 60);
}
}
What is the result?

A. A compilation error occurs in the main method.

B. User is registered.

C. An AgeOutOfLimitException is thrown.

D. A UserException is thrown.

정답: D

문제8

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

문제9

Given:
interface Doable {
public void doSomething (String s);
}
Which two class definitions compile? (Choose two.)

A. public abstract class Work implements Doable {public abstract void doSomething(String s) { }public void doYourThing(Boolean b) { }}

B. public class Do implements Doable {public void doSomething(Integer i) { }public void doSomething(String s) { }public void doThat (String s) { }}

C. public class Job implements Doable {public void doSomething(Integer i) { }}

D. public class Action implements Doable {public void doSomething(Integer i) { }public String doThis(Integer j) { }}

E. public abstract class Task implements Doable {public void doSomethingElse(String s) { }}

정답: B,E

문제10

Given:

and

Which interface from the java.util.function package should you use to refactor the class Txt?

A. Consumer

B. Function

C. Supplier

D. Predicate

정답: C

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

우리와 연락하기

유용한 링크

최신 업데이트