The Delhi Subordinate Services Selection Board (DSSSB) has prescribed a Two-Tier examination scheme for the post of Grade-II (GNCTDSS)/Assistant Section Officer (ASO), Post Code 804/26. The recruitment is being conducted under Advertisement No. 01/2026. According to the official notification, the ASO examination consists of Tier-I and Tier-II, with objective questions in both stages and a descriptive English-writing component in Tier-II.
Candidates preparing for DSSSB ASO 2026 should understand the syllabus carefully because Tier-I is used for shortlisting, while the final selection is based on the combined performance in Tier-II Part-I and Part-II. The official notification also specifies negative marking, qualifying marks, and the subjects to be covered at each stage.
The DSSSB ASO 2026 recruitment is for Grade-II (GNCTDSS)/Assistant Section Officer, Post Code 804/26. The post is under the Services Department of the Government of NCT of Delhi, along with ASO posts in the Delhi Pollution Control Committee and Delhi Urban Shelter Improvement Board. The original advertisement notified 587 ASO vacancies across these departments, including 576 under Services Department, 3 in DPCC and 8 in DUSIB.
| Particular | Details |
|---|---|
| Exam Conducting Body | Delhi Subordinate Services Selection Board (DSSSB) |
| Post | Assistant Section Officer/Grade-II (GNCTDSS) |
| Post Code | 804/26 |
| Advertisement | No. 01/2026 |
| Exam Type | Two-Tier |
| Tier-I | 200 Questions, 200 Marks |
| Tier-I Duration | 2 Hours |
| Tier-II | 300 Marks |
| Tier-II Duration | 3 Hours |
| Tier-II Part-I | 200 MCQs, 200 Marks |
| Tier-II Part-II | Descriptive, 100 Marks |
| Final Selection | Based on Tier-II Part-I + Part-II |
| Negative Marking | 0.25 mark for each wrong 1-mark MCQ |
The official notification states that Tier-I is qualifying and is used for shortlisting candidates for Tier-II. Final selection is based on the cumulative marks secured in both parts of Tier-II.
Understanding the exam pattern before starting preparation is important because the two tiers have different purposes. Tier-I tests the candidate’s basic aptitude, reasoning, language and general awareness, whereas Tier-II adds computer proficiency and a substantial descriptive English component.
Tier-I contains 200 objective-type questions carrying 200 marks. Candidates get 2 hours to complete the paper. Each question carries one mark.
| Subject | Questions | Marks |
|---|---|---|
| General Awareness | 40 | 40 |
| General Intelligence & Reasoning Ability | 40 | 40 |
| Arithmetical & Numerical Ability | 40 | 40 |
| Hindi Language & Comprehension | 40 | 40 |
| English Language & Comprehension | 40 | 40 |
| Total | 200 | 200 |
The official DSSSB notification confirms that all five sections carry 40 marks each in Tier-I.
Tier-II is conducted in one session of three hours and carries a total of 300 marks. It has two parts.
Part-I consists of 200 objective questions for 200 marks. The subjects are General Awareness, General Intelligence & Reasoning Ability, Arithmetical & Numerical Ability, English Language & Comprehension and Computer Proficiency.
Part-II is descriptive and carries 100 marks. It tests candidates’ English writing ability through essay/expansion of ideas, letter/application writing and precis/summarising.
| Tier-II Component | Questions/Task | Marks |
|---|---|---|
| General Awareness | Objective | 40 |
| General Intelligence & Reasoning | Objective | 40 |
| Arithmetical & Numerical Ability | Objective | 40 |
| English Language & Comprehension | Objective | 40 |
| Computer Proficiency | Objective | 40 |
| Essay/Expansion of Ideas | Descriptive | 50 |
| Letter/Application Writing | Descriptive | 25 |
| Precis Writing/Summarising | Descriptive | 25 |
| Total | — | 300 |
The Board has specifically stated that there is no separate mandatory minimum qualifying mark for Tier-II Part-I and Part-II individually; the prescribed minimum qualifying requirement applies to their cumulative marks.
The Tier-I syllabus contains five subjects. The following topic-wise breakdown can be used as a practical preparation framework based on the subjects prescribed by DSSSB.
General Awareness is designed to test the candidate’s awareness of India, the world and current developments. Candidates should combine static GK preparation with current affairs.
Important topics include:
Preparation tip: Current affairs from roughly the previous 6–8 months should receive special attention, particularly government policies, national events, awards, appointments and important developments.
Reasoning questions test logical thinking, pattern recognition and the ability to reach conclusions quickly.
Important topics include:
Candidates should practise questions with a timer because reasoning is generally a speed-oriented section.
The numerical ability section covers fundamental mathematics and requires both accuracy and calculation speed.
Major topics include:
A candidate who has strong command over percentages, ratios, averages, profit and loss, time-work and time-distance can build a strong foundation for this section.
Hindi is included in Tier-I but is not part of the Tier-II Part-I language section. Preparation should focus on both grammar and comprehension.
Important areas include:
Regular practice of Hindi comprehension passages can improve both speed and accuracy.
English is an important subject in both tiers, so candidates should not restrict preparation to Tier-I.
Important topics include:
For Tier-II, candidates should additionally practise formal writing because essay, letter/application and precis writing carry 100 descriptive marks.
Tier-II is the most important stage from the final-selection perspective. The Board has prescribed five subjects in Part-I and three types of descriptive English tasks in Part-II.
The General Awareness syllabus broadly continues from Tier-I. Focus on:
Since the same broad area appears in both tiers, candidates can prepare General Awareness as a combined subject instead of studying it separately for each stage.
The Tier-II reasoning preparation should focus on questions that require greater application and speed.
Important areas include:
Candidates should move from basic concepts to mixed practice sets and full-length mock tests.
The numerical section should be prepared with an emphasis on calculation accuracy.
Important areas include:
The biggest advantage in this section comes from learning standard calculation methods and practising questions under time pressure.
English has greater importance in Tier-II because it is tested through both objective and descriptive questions.
Prepare:
Along with objective questions, candidates should regularly write short essays and formal letters.
Computer Proficiency is included in Tier-II Part-I and carries 40 marks.
Candidates should prepare the following areas:
Particular attention should be given to MS Word, Excel, PowerPoint, shortcuts and basic internet concepts, as these are highly relevant to office-oriented posts such as ASO.
The descriptive component carries 100 marks, making it an important part of the final score.
Candidates may be required to write an essay or expand an idea in English.
Preparation should include topics related to:
A good answer should have a clear introduction, logically arranged points, relevant examples and a concise conclusion.
Candidates should practise formal writing formats such as:
Format, clarity, grammar and appropriate official language are important.
Precis writing tests the ability to understand a passage and express its central idea concisely.
Candidates should practise:
DSSSB has prescribed negative marking for objective questions. A deduction of 0.25 marks is made for every incorrect answer to a one-mark MCQ. The notification also specifies a deduction of 0.50 marks for a wrong two-mark MCQ; however, the ASO 2026 scheme uses one-mark MCQs in the relevant objective papers.
Therefore, candidates should avoid blind guessing. Accuracy should be prioritised along with speed.
The official notification prescribes category-wise minimum qualifying marks for the written examination:
| Category | Minimum Qualifying Marks |
|---|---|
| General/EWS | 40% |
| OBC (Delhi) | 35% |
| SC/ST/PwBD | 30% |
| Ex-Servicemen | 5% relaxation in respective category, subject to minimum 30% |
The Board also reserves the right to prescribe a higher cut-off depending on the number of candidates and vacancies.
A practical preparation strategy is more useful than simply reading the syllabus repeatedly. Since Tier-I is qualifying while Tier-II determines final merit, candidates should use the first stage to build speed and the second stage to maximise their score.
Start with the fundamentals of reasoning, mathematics, English, Hindi, General Awareness and computers. Do not immediately jump to difficult mock tests.
General Awareness, reasoning and numerical ability appear in both tiers. Prepare them comprehensively so that the same study effort benefits both stages.
English appears in Tier-I, Tier-II Part-I and Tier-II Part-II. Therefore, it offers a major opportunity to improve the overall score. Grammar and vocabulary should be combined with regular essay, letter and precis practice.
Do not leave Computer Proficiency for the final weeks. Revise basic computer concepts and office applications regularly.
Writing 100 marks of descriptive content under examination conditions requires practice. Candidates should write at least one essay, one formal letter and one precis every week during the later stages of preparation.
After completing the syllabus, attempt full-length Tier-I mocks. Analyse incorrect answers instead of simply counting the score.
For Tier-II, practise both objective questions and descriptive writing within the prescribed three-hour duration.
| Subject | Recommended Focus |
|---|---|
| General Awareness | Current affairs + static GK |
| Reasoning | Concepts + timed practice |
| Numerical Ability | Formulae + calculation speed |
| Hindi | Grammar + comprehension |
| English | Grammar + vocabulary + comprehension |
| Computer | Fundamentals + office applications |
| Descriptive English | Essay + letter + precis |
A useful daily routine can include 2 hours for mathematics and reasoning, 1.5 hours for English/Hindi, 1 hour for general awareness, 45 minutes for computers and 30–45 minutes for descriptive writing. The exact schedule can be adjusted according to individual strengths.
Candidates should always download the syllabus and examination scheme from the official DSSSB website rather than relying on an unofficial PDF. DSSSB’s official 2026 advertisement contains the complete examination scheme for Post Code 804/26, including Tier-I and Tier-II subjects, marks, duration and descriptive-paper details.
Official DSSSB ASO 2026 Advertisement PDF: Download DSSSB ASO 2026 Official Advertisement PDF
Candidates should also check the DSSSB website regularly because the Board can issue corrigenda, examination schedules and other notices after the initial advertisement. A corrigendum relating to Post Code 804/26 was issued in May 2026, so candidates should rely on the latest official notice when there is any change.
The DSSSB ASO Syllabus 2026 is manageable if preparation is divided intelligently between the two stages. Tier-I should be treated as a speed-and-accuracy test, while Tier-II deserves greater attention because its objective and descriptive components determine the final merit.
Candidates should give special importance to English, General Awareness, reasoning, numerical ability and computer proficiency, while starting descriptive English practice well before the examination. Most importantly, candidates should keep checking the official DSSSB portal for the latest examination schedule, corrigenda and other recruitment notices rather than relying on old ASO syllabus information.
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