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1z0-809 Practice Questions

Question # 1

Which statement is true about java.util.stream.Stream?

A.

A stream cannot be consumed more than once.

B.

The execution mode of streams can be changed during processing.

C.

Streams are intended to modify the source data.

D.

A parallel stream is always faster than an equivalent sequential stream



B.

The execution mode of streams can be changed during processing.



Question # 2

Given the code fragment:

What is the result?

A.

Found Red
Found Default

B.

Found Teal

C.

Found Red
Found Blue
Found Teal

D.

Found Red
Found Blue
Found Teal
Found Default

E.

Found Default



B.

Found Teal



Question # 3

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.readline());

B.

int GDP = br.read();

C.

int GDP = br.nextInt();

D.

int GDP = Integer.parseInt (br.next());



C.

int GDP = br.nextInt();



Question # 4

Given the code fragment

Which code fragments, inserted independently, enable the code compile?

A.

t.fvar = 200;

B.

cvar = 400;

C.

this.fvar = 200;
this.cvar = 400;

D.

t.fvar = 200;
Test2.cvar = 400;

E.

this.fvar = 200;
Test2.cvar = 400;



B.

cvar = 400;



Question # 5

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

A.

It accepts one argument and returns void.

B.

It accepts one argument and returns boolean.

C.

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

D.

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



C.

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


Reference: http://winterbe.com/posts/2014/03/16/java-8-tutorial/ (functions)


Question # 6

Given:


A.

Option A

B.

Option B

C.

Option C

D.

Option D

E.

Option E



B.

Option B


E.

Option E


When an abstract class is subclassed, the subclass usually provides
implementations for all of the abstract methods in its parent class (E). However, if it does
not, then the subclass must also be declared abstract (B).
Note: An abstract class is a class that is declared abstract—it may or may not include
abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.


Question # 7

Given:

What is the result?

A.

2 4 6 8

B.

2 4 6 8 9

C.

1 3 5 7

D.

1 3 5 7 9



D.

1 3 5 7 9



Question # 8

Given:
class CheckClass {
public static int checkValue (String s1, String s2) {
return s1 length() – s2.length();
}
}
and the code fragment:
String[] strArray = new String [] {“Tiger”, “Rat”, “Cat”, “Lion”}
//line n1
for (String s : strArray) {
System.out.print (s + “ “);
}
Which code fragment should be inserted at line n1 to enable the code to print Rat Cat Lion
Tiger?

A.

Arrays.sort(strArray, CheckClass : : checkValue);

B.

Arrays.sort(strArray, (CheckClass : : new) : : checkValue);

C.

Arrays.sort(strArray, (CheckClass : : new).checkValue);

D.

Arrays.sort(strArray, CheckClass : : new : : checkValue);



D.

Arrays.sort(strArray, CheckClass : : new : : checkValue);



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Oracle 1z0-809 Exam Dumps

Exam Name: Java SE 8 Programmer II
Certification Name: Java SE

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  • Total Questions: 196
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