: The scanners are sensitive to how bubbles are filled. Half-filled, over-filled, or tick-marked bubbles may not be recognized by the software.
cross × ), or half-filled circles may be ignored by the software. One Bubble per Question: Darkening more than one bubble for a single question will result in zero marks for that item, and in the BCS exam, it may even trigger negative marking. No Erasures or Overwriting: You cannot use white-out or erasers. Once a bubble is filled, it is final. Attempting to change an answer often renders the response unreadable. Common Pitfalls to Avoid Expert tips for competitive exams emphasize avoiding these errors to prevent OMR rejection: Serial Mismatches: Accidentally skipping a question on the OMR sheet while continuing to answer on the question paper can cause a "row shift" error, making all subsequent answers incorrect. Damaging the Sheet: Do not fold, staple, or wrinkle the OMR sheet. The timing tracks (the black bars on the edges) must remain clean for the scanner to align correctly. Incorrect Set Code: Failing to fill or incorrectly filling the bcs preliminary omr sheet
This is the most critical part of the sheet. You must fill this out with extreme care. It usually includes: : The scanners are sensitive to how bubbles are filled
More than just a bubble-filled grid, the BCS Preliminary OMR sheet is the final arbiter of who advances to the written stage. A single stray mark, a half-filled circle, or a misplaced roll number can end a year of preparation. One Bubble per Question: Darkening more than one