Free Access Oracle.1z1-819.v2022-03-29.q108 Practice Test (Page 5)

var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

A.double avg = numbers.stream().parallel().averagingDouble(a -> a);

B.double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble ();

C.double avg = numbers.stream().mapToInt (i -> i).average().parallel();

D.double avg = numbers.stream().average().getAsDouble();

E.double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n));

Given a Memberclass with fields for nameand yearsMembership, including getters and setters and a print method, and a list of clubMembersmembers:

Which two Stream methods can be changed to use method references? (Choose two.)

A.map(testName::compareToIgnoreCase)

B.peek(Member::print)

C.filter(Member::getYearsMembership() >= testMembershipLength)

D.filter(Integer::equals(0))

Given:

Which would cause s to be AQCD?

A.s.replace(s.indexOf("B"), s.indexOf("B"), "Q");

B.s.replace(s.indexOf("B"), s.indexOf("C"), "Q");

C.s.replace(s.indexOf("A"), s.indexOf("C"), "Q");

D.s.replace(s.indexOf("A"), s.indexOf("B"), "Q");

Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

A..map(Employee::getLocality)
.distinct()
.count();

B.map(e > e.getLocality())
.count();

C..map(e > e.getLocality())
.collect(Collectors.toSet())
.count();

D..filter(Employee::getLocality)
.distinct()
.count();

Given:

Which code, when inserted at one or more marked positions, would allow classes B and C to compile?

A.@Override // position 2public void z() { } // position 3

B.@Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3

C.implements A // position 1@Override // position 2

D.public void z() { } // position 3

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