Code reviewMediumcr-g291

Subject PerformanceLevel Mid–Senior~18 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

Review this Go function that joins many short fields into one line. It runs per log line on a high-throughput ingest path.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

Learn the concepts

Talk through your review

Code to reviewgo

1func joinFields(fields []string) string {2    line := ""3    for _, f := range fields {4        line += f + "|"5    }6    return line7}

Run or narrate your approach, then ask the coach.