Purpose of a Code Review in Software Development

Why the Answer Is Correct

A code review is performed by peers who read a change together before it is merged, so its main purpose is to identify and review errors with the team. That wording captures the full scope of the practice: defects and coding-standard violations are surfaced, questions are asked, knowledge transfers between authors and reviewers, and the codebase stays consistent. Treating the review as a team activity is what distinguishes it from a solitary lint or unit-test run.

Why the Other Options Are Wrong

'To detect logical errors' narrows the purpose to a single defect class and ignores style, security, readability and knowledge-sharing, so it is too limited to be the main purpose. 'To ensure that all code is checked in simultaneously' describes a release or integration practice rather than a review goal, and simultaneous check-in is unrelated to reviewing quality. 'To provide the technical lead visibility into all code' describes a management side effect: visibility may result from reviews, but it is not their purpose and would not by itself justify reviewing every change.

Community Comment Notes

Voters overwhelmingly chose the team-review option, and one comment explained that a review acknowledges the multifaceted nature of the process, covering collaboration, knowledge transfer and quality assurance rather than error detection alone. A dissenting comment preferred 'to detect logical errors', arguing that improving quality is the central aim, but reviewers noted this is only one facet of the team activity.