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Official NSEC source library

The IAPT and HBCSE publications behind the dates, syllabus, question papers and answer keys on this website.

Use these original publications to verify exam information and resource provenance. Every paper page also links its own paper and matching key.

Current examination information

Paper and document sources

DocumentOfficial source
NSEC_2025_Code_31.pdfOpen original PDF
NSEC_2025_Final_Answer_Key.pdfOpen original PDF
NSEC_2025_Official_Solutions.pdfOpen original PDF
NSEC_2024_Code_31.pdfOpen original PDF
NSEC_2024_Final_Answer_Key.pdfOpen original PDF
NSEC_2023_Code_31.pdfOpen original PDF
NSEC_2023_Archive_Linked_Key.pdfOpen original PDF
NSEC_2022_Code_31.pdfOpen original PDF
NSEC_2022_Final_Answer_Key.pdfOpen original PDF
IOQC_2020-21_Part_I_Held_2021.pdfOpen original PDF
IOQC_2020-21_Part_I_Official_Solutions.pdfOpen original PDF
IOQC_2020-21_Part_I_Answer_Key.pdfOpen original PDF
IOQC_2021-22_Part_I_Held_2022.pdfOpen original PDF
IOQC_2021-22_Part_I_Answer_Key.pdfOpen original PDF
NSEC_2024_Delhi_NCR_Code_35.pdfOpen original PDF
NSEC_2024_Delhi_NCR_Final_Key.pdfOpen original PDF
NSE_2026_Booklet.pdfOpen original PDF
Syllabus_Currently_Linked_By_IAPT_2026.pdfOpen original PDF

Reading labels correctly

A final answer key lists accepted options. A worked solution explains the method. An original mock is authored practice, not an official examination paper. The site keeps these categories distinct and preserves the session names of IOQC papers.