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1z0-809 Practice Questions

Question # 1

Given the code fragment:
Stream<Path> files = Files.walk(Paths.get(System.getProperty(“user.home”)));
files.forEach (fName -> {//line n1
try {
Path aPath = fName.toAbsolutePath();//line n2
System.out.println(fName + “:”
+ Files.readAttributes(aPath, Basic.File.Attributes.class).creationTime
());
} catch (IOException ex) {
ex.printStackTrace();
});
What is the result?

A.

All files and directories under the home directory are listed along with their attributes.

B.

A compilation error occurs at line n1.

C.

The files in the home directory are listed along with their attributes.

 

 

D.

A compilation error occurs at line n2.



A.

All files and directories under the home directory are listed along with their attributes.



Question # 2

Given:

What is the result?

A.

Initialized
Started

B.

Initialized
Started
Initialized

C.

Compilation fails

D.

An exception is thrown at runtime



B.

Initialized
Started
Initialized



Question # 3

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?

A.

Good day!
Test
followed by an Exception stack trace

B.

Good day!
followed by an Exception stack trace

C.

Good day!
Test
null

D.

A compilation error occurs at line n1.



D.

A compilation error occurs at line n1.



Question # 4

Given:

A.

Ym
Xm2

B.

Ym
Xm1

C.

Compilation fails

D.

A ClassCastException is thrown at runtime



B.

Ym
Xm1



Question # 5

A method is declared to take three arguments. A program calls this method and passes
only two arguments. What is the results?

A.

Compilation fails.

B.

The third argument is given the value null.

C.

The third argument is given the value void.

D.

The third argument is given the value zero.

E.

The third argument is given the appropriate falsy value for its declared type. F) An
exception occurs when the method attempts to access the third argument.



A.

Compilation fails.



Question # 6

Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2;//line n1
System.out.println(val.apply(10, 10.5));
What is the result?

A.

20

B.

20.5

C.

A compilation error occurs at line n1.

D.

A compilation error occurs at line n2.



C.

A compilation error occurs at line n1.



Question # 7

Given the class definitions:

What is the result?

A.

Java
Java
Java

B.

Java
Jeve
va

C.

Java
Jeve
ve

D.

Compilation fails



D.

Compilation fails



Question # 8

Given the code fragment:
Map<Integer, String> books = new TreeMap<>();
books.put (1007, “A”);
books.put (1002, “C”);
books.put (1001, “B”);
books.put (1003, “B”);
System.out.println (books);
What is the result?

A.

{1007 = A, 1002 = C, 1001 = B, 1003 = B}

B.

 {1001 = B, 1002 = C, 1003 = B, 1007 = A}

C.

{1002 = C, 1003 = B, 1007 = A}

D.

{1007 = A, 1001 = B, 1003 = B, 1002 = C}



D.

{1007 = A, 1001 = B, 1003 = B, 1002 = C}



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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
  • Last Updation Date: 17-Feb-2025

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