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CDS (I) 2016 Key
340 solved questions · 131 pages · 30 topics · mean difficulty 4.67/10
92.4%314/340 mapped
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QUATRAE CDS MASTER KEYS · 2016–2026Browse all CDS keys ↓
CDS Keys — 2016 to 2026
Every written paper from 2016 through 2026 in one sequential archive. Open any sitting to preview the cover, mapping statement, analysis and solved pages, then download the complete personalised PDF free.
22Exam sittings
7,480Questions solved
89.1%Cumulative mapping
6,663Page-wise matches
Open the cumulative mapping card ↗CUMULATIVE MAPPING · 2016–2026
What eleven years of papers say about QUATRAE CDS Material.
Each question was screened against the complete relevant QUATRAE page index. Mathematics and General Science map by transferable concept and method; direct synonyms, antonyms and idiom meanings require the exact tested expression; static GK requires focused topic coverage. Eligible recent current-affairs questions may also map to a pre-exam Lecturette or Group Discussion issue.
89.1%6,663 of 7,480 questions mapped
across 22 CDS papers
across 22 CDS papers
QUATRAE CDS material · pageLecturette / GD · eligible papersUnmapped
From 2016 to 2026, in examination order.
Every entry includes the fresh complete PDF, its paper-specific mapping image and six preview pages. A mapped question carries the QUATRAE book and numeric page reference beside its solution; unmapped questions are left without an invented citation.
2016
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CDS (II) 2016 Key
340 solved questions · 132 pages · 34 topics · mean difficulty 4.48/10
90%306/340 mapped
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2017
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CDS (I) 2017 Key
340 solved questions · 131 pages · 29 topics · mean difficulty 4.41/10
91.8%312/340 mapped
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CDS (II) 2017 Key
340 solved questions · 128 pages · 41 topics · mean difficulty 4.48/10
83.2%283/340 mapped
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2018
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CDS (I) 2018 Key
340 solved questions · 130 pages · 37 topics · mean difficulty 4.53/10
87.9%299/340 mapped
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CDS (II) 2018 Key
340 solved questions · 133 pages · 38 topics · mean difficulty 4.66/10
90.9%309/340 mapped
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2019
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CDS (I) 2019 Key
340 solved questions · 129 pages · 44 topics · mean difficulty 4.59/10
82.6%281/340 mapped
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CDS (II) 2019 Key
340 solved questions · 131 pages · 44 topics · mean difficulty 4.69/10
87.1%296/340 mapped
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2020
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CDS (I) 2020 Key
340 solved questions · 131 pages · 38 topics · mean difficulty 4.33/10
89.1%303/340 mapped
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CDS (II) 2020 Key
340 solved questions · 129 pages · 38 topics · mean difficulty 4.48/10
87.6%298/340 mapped
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2021
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CDS (I) 2021 Key
340 solved questions · 129 pages · 36 topics · mean difficulty 4.65/10
86.5%294/340 mapped
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CDS (II) 2021 Key
340 solved questions · 130 pages · 30 topics · mean difficulty 4.51/10
89.1%303/340 mapped
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2022
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CDS (I) 2022 Key
340 solved questions · 130 pages · 35 topics · mean difficulty 4.35/10
92.1%313/340 mapped
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CDS (II) 2022 Key
340 solved questions · 132 pages · 31 topics · mean difficulty 4.64/10
91.8%312/340 mapped
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2023
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CDS (I) 2023 Key
340 solved questions · 130 pages · 32 topics · mean difficulty 4.56/10
89.7%305/340 mapped
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CDS (II) 2023 Key
340 solved questions · 133 pages · 35 topics · mean difficulty 4.49/10
90.6%308/340 mapped
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2024
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CDS (I) 2024 Key
340 solved questions · 133 pages · 33 topics · mean difficulty 4.51/10
90.3%307/340 mapped
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CDS (II) 2024 Key
340 solved questions · 134 pages · 38 topics · mean difficulty 4.56/10
90.6%308/340 mapped
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2025
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CDS (I) 2025 Key
340 solved questions · 131 pages · 33 topics · mean difficulty 4.55/10
88.8%302/340 mapped
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CDS (II) 2025 Key
340 solved questions · 134 pages · 37 topics · mean difficulty 4.63/10
90.6%308/340 mapped
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2026
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CDS (I) 2026 Key
340 solved questions · 137 pages · 38 topics · mean difficulty 4.63/10
91.8%312/340 mapped
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CDS (II) 2026 Key
340 solved questions · 135 pages · 29 topics · mean difficulty 5.15/10
85.3%290/340 mapped
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Own the books these papers were mapped to.
Each key points to the relevant QUATRAE page. The bundles put the complete written library—and, if you choose, the full SSB library—in your account for permanent access.
Complete CDS Written Bundle
Every QUATRAE CDS Elementary Mathematics, English and General Knowledge book — the material mapped across 22 CDS papers from 2016 to 2026.
83 books · instant download · yours forever
₹1,499₹6,55777% OFF
See every book inside →CDS (Written + SSB) Bundle
The full CDS written library plus the complete SSB bundle — OIR, PPDT, TAT, WAT, SRT, GD and Lecturette. Clear the paper, then clear the board.
313 books · instant download · yours forever
₹4,499₹21,11079% OFF
See every book inside →Complete NDA Written Bundle
Every QUATRAE NDA Mathematics, English and General Knowledge book — the material mapped across 22 NDA papers from 2016 to 2026.
120 books · instant download · yours forever
₹1,999₹9,48079% OFF
See every book inside →NDA (Written + SSB) Bundle
The full NDA written library plus the complete SSB bundle — OIR, PPDT, TAT, WAT, SRT, GD and Lecturette. Clear the paper, then clear the board.
350 books · instant download · yours forever
₹4,999₹24,03379% OFF
See every book inside →22 free keys · 2016–2026 · 7,480 solved questions
Choose a paper ↑Complete CDS key archive
Also preparing for NDA? Open all NDA keys →
These keys are prepared independently by QUATRAE from the question papers and are for self-assessment; official UPSC keys are final. Downloaded copies are stamped with the account email and are for personal use only. QUATRAE is not affiliated with UPSC, the Indian Armed Forces or any Services Selection Board.