GH-500 Question #117: Real Exam Question with Answer & Explanation

Question

You are configuring a CodeQL workflow for compiled languages. What happens if your workflow uses a language matrix?

Options

• AAnalysis of other languages in your repository will fail unless you supply explicit build commands.
• BAutobuild attempts to build the supported language that has the most source files in the
• CYou may need to install additional software to use the autobuild process.
• DAutobuild attempts to build each of the languages listed in the matrix.

Explanation

{"question_number": 5, "question": "You are configuring a CodeQL workflow for compiled languages. What happens if your workflow uses a language matrix?", "correct_answer": "D. Autobuild attempts to build each of the languages listed in the matrix.", "explanation": "When a CodeQL workflow uses a matrix strategy (e.g., matrix: language: [java, cpp]), GitHub's autobuild step runs a separate job for each language entry in the matrix and attempts to automatically detect and build that language's project. This is the expected behavior for multi-language compiled codebases. Choice A (other languages fail) describes a scenario for a single-language workflow that lacks explicit build commands, not a matrix workflow. Choice B describes an incorrect heuristic (most source files). Choice C is a concern for specific toolchains but is not a general statement about what happens with a matrix.", "generated_by": "claude-sonnet", "llm_judge_score": 4}

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