CompTIA A+ Core 1 (220-1101) — Question 496

Vertical streaks are appearing on the output of a laser printer. Which of the following items is the MOST likely cause?

Answer options

• A. Roller
• B. Drum
• C. Transfer belt
• D. Ribbon

Correct answer: B

Explanation

Vertical streaks on printed documents are typically caused by issues with the drum, which is responsible for transferring toner onto paper. The roller, transfer belt, and ribbon are less likely to cause this specific issue, as they serve different functions in the printing process.