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Java SE 8 Programmer II

Last Update Apr 17, 2024
Total Questions : 196

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Java SE 8 Programmer II Questions and Answers

Questions 1

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?

Options:

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);

Questions 2

Given the code fragment:

List codes = Arrays.asList (“DOC”, “MPEG”, “JPEG”);

codes.forEach (c -> System.out.print(c + “ “));

String fmt = codes.stream()

.filter (s-> s.contains (“PEG”))

.reduce((s, t) -> s + t).get();

System.out.println(“\n” + fmt);

What is the result?

Options:

A.

DOC MPEG JPEGMPEGJPEG

B.

DOC MPEG MPEGJPEGMPEGMPEGJPEG

C.

MPEGJPEGMPEGJPEG

D.

The order of the output is unpredictable.

Questions 3

Given the code fragment:

What is the result?

Options:

A.

A compilation error occurs at line n1.

B.

Logged out at: 2015-01-12T21:58:19.880Z

C.

Can’t logout

D.

Logged out at: 2015-01-12T21:58:00Z