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ch15a.html
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<!doctype html>
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<meta name="description" content="Study guide for the Oracle Certified Professional, Java SE 8 Programmer Exam ">
<title>Java 8 Programmer II Study Guide: Exam 1Z0-809</title>
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<h1><i class="chapter">Chapter FIFTEEN</i><br />
Data Search</h1>
<p><br /></p>
<h3 style="text-align: center;"><i>Exam Objectives</i></h3>
<p style="text-align: center;"><i>Search for data by using search methods of the Stream classes including findFirst, findAny, anyMatch, allMatch, noneMatch.</i><br /></p>
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<h2>Answers</h2>
<p><b>1. The correct answer is D.</b><br />
<code>anyMatch()</code> is a terminal operation, it cannot be linked together with another operation.</p>
<p><br /></p>
<p><b>2. The correct answer is C.</b><br />
<code>findAny()</code> returns <code>Optional<T></code>. <code>filter()</code> is an intermediate operation that returns a new stream. <code>findMatch()</code> doesn't exists and <code>anyMatch()</code> returns a <code>boolean</code>.</p>
<p><br /></p>
<p><b>3. The correct answer is C.</b><br />
<code>allMatch()</code> short-circuits at the first element that doesn't match the given predicate, <code>1</code>.</p>
<p><br /></p>
<p><b>4. The correct answer is A.</b><br />
<code>filter()</code> returns a stream of elements starting with <code>4</code>. So first, <code>4</code> is passed to <code>anyMatch()</code>, it's printed and since the condition fails, the next element generated by <code>filter()</code>, <code>5</code>, it's passed, which is printed and, since the condition is <code>true</code>, the whole process is stopped.</p>
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