Automatic Bug-Fixing Techniques Quiz
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Questions and Answers

What is the typical goal of automatic bug-fixing techniques?

  • To automatically generate incorrect patches to eliminate bugs without causing regression
  • To manually generate incorrect patches to eliminate bugs without causing regression
  • To manually generate correct patches to eliminate bugs without causing regression
  • To automatically generate correct patches to eliminate bugs without causing regression (correct)

What does a test suite serve as in automatic bug fixing?

  • A formal specification for bug fixing
  • A faulty behavior oracle
  • An input/output pairs oracle (correct)
  • A regression oracle

Why can a validated patch still produce incorrect outputs for some inputs in a test suite?

  • Because the test suite captures all possible cases
  • Because the test suite is typically incomplete (correct)
  • Because the test suite focuses on regression testing
  • Because the test suite only includes incorrect inputs

What is the major challenge for generate-and-validate techniques in automatic bug fixing?

<p>Dealing with incomplete test suites and possible incorrect patches (A)</p> Signup and view all the answers

What do automatic bug-fixing techniques aim to eliminate in software programs?

<p>Bugs without causing regression (B)</p> Signup and view all the answers

What role does a formal specification play in automatic bug fixing?

<p>It encapsulates the functionality any program repair method must preserve (A)</p> Signup and view all the answers

What is the main reason that verification against full specifications is less common?

<p>The prohibitive computation cost of such verification (D)</p> Signup and view all the answers

Why are full program behavior specifications less commonly used for bug fixing?

<p>They are rarely available in practice (A)</p> Signup and view all the answers

What is the main benefit of generate-and-validate bug-fixing techniques?

<p>They collect all validated patches that produce expected outputs (B)</p> Signup and view all the answers

How do recent approaches differ in the generation of candidate patches compared to earlier genetic improvement approaches?

<p>They use fine-grained operators at the abstract syntax tree level (D)</p> Signup and view all the answers

Which aspect of bug-fixing systems like GenProg remains controversial?

<p>Their effectiveness in providing patch correctness guarantees (B)</p> Signup and view all the answers

Why are full program behavior specifications rarely used for verification?

<p>The prohibitive computation cost of such verification (B)</p> Signup and view all the answers

What is a reasonable repair strategy according to the text?

<p>Applying mutation operators on the original program (A)</p> Signup and view all the answers

What is a common characteristic of recent state-of-the-art bug-fixing systems?

<p>'Promising' reported results (A)</p> Signup and view all the answers

What is a key factor contributing to the controversial nature of generate-and-validate bug-fixing techniques?

<p>The inability to provide patch correctness guarantees (C)</p> Signup and view all the answers

Why are targeted bug-fixing techniques often used?

<p>To identify correct patches among validated patches (C)</p> Signup and view all the answers

What are some additional sources of information that successful automatic bug-fixing techniques rely on, other than the test suite?

<p>Information learned from previous human patches</p> Signup and view all the answers

What is a less common but comprehensive way to specify the expected behavior in automatic bug fixing?

<p>Verification against full specifications</p> Signup and view all the answers

What is the computation cost of verification against full specifications, which makes it less common in practice?

<p>Prohibitive</p> Signup and view all the answers

What type of specifications are typically not available in practice for automatic bug fixing?

<p>Full program behavior specifications</p> Signup and view all the answers

What is the main challenge for generate-and-validate bug-fixing techniques in automatic bug fixing?

<p>Patch correctness guarantees</p> Signup and view all the answers

What are some mutation operators used to generate candidate patches in automatic bug fixing?

<p>Mutation operators manipulate the original program</p> Signup and view all the answers

What is a reasonable repair strategy according to the text in automatic bug fixing?

<p>Statement deletion</p> Signup and view all the answers

What is the typical goal of automatic bug-fixing techniques?

<p>To generate correct patches</p> Signup and view all the answers

What is a key factor contributing to the controversial nature of generate-and-validate bug-fixing techniques?

<p>Lack of patch correctness guarantees</p> Signup and view all the answers

What is the role of formal specifications in automatic bug fixing?

<p>To specify the expected behavior</p> Signup and view all the answers

What is the role of a test suite in automatic bug fixing?

<p>The test suite serves as an input/output pairs oracle to drive the search, capturing the functionality of the program.</p> Signup and view all the answers

What is the major challenge for generate-and-validate techniques in automatic bug fixing?

<p>The major challenge is the existence of validated patches that produce correct outputs for test suite inputs but incorrect outputs for other inputs.</p> Signup and view all the answers

Why are full program behavior specifications rarely used for verification in automatic bug fixing?

<p>Full program behavior specifications are rarely used due to their incompleteness and inability to cover all possible cases.</p> Signup and view all the answers

What is a key factor contributing to the controversial nature of generate-and-validate bug-fixing techniques?

<p>The existence of validated but incorrect patches is a key factor contributing to the controversial nature of generate-and-validate bug-fixing techniques.</p> Signup and view all the answers

How do recent approaches differ in the generation of candidate patches compared to earlier genetic improvement approaches?

<p>Recent approaches differ by generating candidate patches according to a specification of the expected behavior, while earlier genetic improvement approaches did not focus on such specifications.</p> Signup and view all the answers

What is a reasonable repair strategy according to the text?

<p>A reasonable repair strategy is to use an input/output pairs oracle (test suite) to drive the search for correct patches, capturing the functionality of the program.</p> Signup and view all the answers

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