SOF International Computer Science Olympiad (ICSO, formerly NCO)

SOF's computer science olympiad, held in schools. It was the National Cyber Olympiad (NCO). SOF describes a single paper; no Level 2 is mentioned.

The facts, from the official site

Dates 2026-27: 24 September 2026 and 17 December 2026 (the school picks one). Source: sofworld.org ↗
Pattern: 60 minutes. 35 questions for Classes 1-4, 50 for Classes 5-10, multiple choice. Classes 1-2: Logical Reasoning, Computer Science, Information Technology and an Achievers Section; Classes 3-10: Logical Reasoning, Computer Science, AI Robotics and IT, and an Achievers Section. Source: sofworld.org ↗
Fee and registration: ₹170 (GST included) per student per olympiad for schools in India; a school may add up to ₹30. Students register through their school, which acts as the exam centre. Source: sofworld.org ↗

SOF publishes a syllabus for each class. Official syllabus: sofworld.org ↗

SOF ICSO syllabus, class by class ↗SOF's own syllabus page; pick your class (sofworld.org)
SOF ICSO free sample papers 2026-27 ↗SOF's own free PDF sample paper for each class, no login (sofworld.org)
SOF ICSO exam dates ↗The Level 1 dates SOF has announced for 2026-27 (sofworld.org)

Read the syllabus for your class first, then try one official paper under the real time limit, without help.
Mark it with the official answer key, and list each question you got wrong by topic. That list is what to study next.
Try the next paper a week or two later and compare which topics are still on your list.
Your school registers you and tells you which of SOF's dates it has chosen.

SOF's sample-paper pages also advertise a publisher's paid practice books. Shishya does not copy or link those books; the sample papers linked here are SOF's own free PDFs.

Read on the official sites on 23 Oct 2026. Dates can change; the conducting body's site is the final word.