As a DevOps engineer, you are developing workflows to build an application. You have a requirement to create the build targeting multiple node versions. Which code block should you use to define the w

Question

Exhibits

Options

• Ajobs: build-app: strategy: matrix: node-ver: [10, 12, 14] steps: - uses: actions/setup-node@v3 with: node-version: ${{ matrix.node-ver }}
• Bjobs: build-app: matrix-strategy: node-ver: [10, 12, 14] steps: - uses: actions/setup-node@v3 with: node-version: ${{ matrix-strategy.node-ver }}
• Cjobs: build-app: matrix: strategy: node-ver: [10, 12, 14] steps: - uses: actions/setup-node@v3 with: node-version: ${{ matrix-strategy.node-ver }}
• Djobs: build-app: strategy: matrix: node-ver: [10, 12, 14] steps: - uses: actions/setup-node@v3 with: node-version: ${{ strategy.node-ver }}

• A
  72% (23)
• B
  9% (3)
• C
  16% (5)
• D
  3% (1)

Explanation

GitHub Actions matrix strategy syntax requires the strategy keyword at the job level, with matrix nested inside it. The matrix context variables are then referenced using matrix.<variable-name> (e.g., matrix.node-ver). Option B incorrectly uses matrix-strategy as a top-level key and wrong context reference. Option C reverses the nesting order (puts matrix above strategy). Option D uses strategy.node-ver instead of matrix.node-ver as the context reference. Only Option A uses the correct strategy.matrix nesting and matrix.node-ver context syntax.

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