The Delhi Subordinate Services Selection Board (DSSSB) has released the syllabus for the DASS Grade-II/Assistant Section Officer (ASO) examination. Candidates preparing for the DSSSB ASO Exam 2026 should understand the complete syllabus and exam pattern before starting their preparation.
The examination covers subjects including General Awareness, General Intelligence & Reasoning, Arithmetical & Numerical Ability, Hindi, English and Computer Proficiency. Here, candidates can check the latest subject-wise syllabus, exam pattern, selection process and other important details.
DSSSB ASO Syllabus 2026 – Overview
| Particulars | Details |
|---|---|
| Exam | DSSSB DASS Grade-II / ASO |
| Conducting Authority | Delhi Subordinate Services Selection Board |
| Exam Mode | Online CBT |
| Exam Type | Objective & Descriptive |
| Tier 1 Questions | 200 |
| Tier 1 Marks | 200 |
| Negative Marking | 0.25 marks |
| Exam Level | State Level |
| Job Location | Delhi |
| Selection Process | Tier 1, Tier 2, Document Verification & Medical Examination |
DSSSB ASO Exam Pattern 2026
The DSSSB ASO examination is conducted in two written stages: Tier 1 and Tier 2. Tier 1 is primarily used for shortlisting candidates, while Tier 2 includes both objective and descriptive components.
DSSSB ASO Tier 1 Exam Pattern
The Tier 1 examination contains 200 objective-type questions for a total of 200 marks.
| Subject | Questions | Marks | Duration |
|---|---|---|---|
| General Awareness | 40 | 40 | 2 Hours |
| General Intelligence & Reasoning | 40 | 40 | |
| Arithmetical & Numerical Ability | 40 | 40 | |
| Hindi Language & Comprehension | 40 | 40 | |
| English Language & Comprehension | 40 | 40 | |
| Total | 200 | 200 | 2 Hours |
There is a negative marking of 0.25 marks for every incorrect MCQ answer.
DSSSB ASO Tier 2 Exam Pattern
The Tier 2 examination includes objective as well as descriptive sections.
| Subject | Questions | Marks | Duration |
|---|---|---|---|
| General Awareness | 40 | 40 | 3 Hours |
| General Intelligence & Reasoning Ability | 40 | 40 | |
| Arithmetical & Numerical Ability | 40 | 40 | |
| English Language & Comprehension | 40 | 40 | |
| Computer Proficiency | 40 | 40 | |
| Essay / Expansion of Ideas | — | 50 | |
| Letter / Application Writing | — | 25 | |
| Precis Writing / Summarising | — | 25 | |
| Total | — | 300 | 3 Hours |
DSSSB ASO Syllabus 2026
The syllabus is divided into different subjects. Candidates should prepare every topic thoroughly because questions can be asked from different areas of the prescribed syllabus.
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General Awareness
The General Awareness section covers topics related to India, current events, history, geography, polity, economy, science and other general knowledge areas.
Important topics include:
- Current Affairs
- History
- Indian Polity
- Indian Constitution
- Geography
- Economics
- Sports
- Art and Culture
- General Science
- Scientific Research
- National and International Organisations
- Everyday observations and their applications
- Current national and international events
General Intelligence & Reasoning
The Reasoning section tests candidates’ logical thinking, analytical ability and problem-solving skills.
Important topics include:
- Analogies
- Similarities and Differences
- Classification
- Verbal Reasoning
- Non-Verbal Reasoning
- Space Visualization
- Problem Solving
- Analysis
- Judgement
- Decision Making
- Visual Memory
- Observation
- Relationships
- Arithmetical Reasoning
- Number Series
- Figure Classification
- Logical Concepts
Arithmetical & Numerical Ability
Candidates should focus on basic mathematical concepts as well as calculation-based questions.
Important topics include:
- Number System
- Simplification
- Decimals
- Fractions
- LCM and HCF
- Ratio and Proportion
- Percentage
- Average
- Profit and Loss
- Discount
- Simple Interest
- Compound Interest
- Time and Work
- Time and Distance
- Mensuration
- Data Interpretation
- Tables and Graphs
English Language & Comprehension
The English section evaluates candidates’ understanding of the language, grammar and vocabulary.
Important topics include:
- Reading Comprehension
- Vocabulary
- Grammar
- Sentence Structure
- Synonyms
- Antonyms
- Correct Usage of Words
- Sentence-based questions
Hindi Language & Comprehension
The Tier 1 examination also includes Hindi Language and Comprehension. Candidates should prepare Hindi grammar, vocabulary, comprehension and correct usage according to the prescribed level.
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Computer Proficiency
Computer-related questions are included in Tier 2.
Important topics include:
- Computer Hardware and Software
- History and Origin of Computers
- Generations of Computers
- Windows Operating System
- Internet and Related Terms
- MS Office
- Computer Networking
- Communication
- Database Management
- Computer Viruses and Security
- Input and Output Devices
- Computer Shortcut Keys
DSSSB ASO Syllabus 2026 PDF
Candidates can download the official syllabus PDF to check the detailed topics and examination requirements.
DSSSB ASO Syllabus 2026 PDF – Download Here
DSSSB ASO Selection Process 2026
The selection process generally consists of the following stages:
- Tier 1 Written Examination
- Tier 2 Written Examination
- Document Verification
- Medical Examination, wherever applicable
- Final Merit List
There is no interview for the DSSSB ASO post. The final selection is based on the applicable written examination merit and fulfillment of the prescribed eligibility requirements.
DSSSB ASO Preparation Tips
Candidates can follow these strategies for effective preparation:
- Read the complete syllabus before beginning preparation.
- Divide the syllabus subject-wise and prepare a realistic timetable.
- Give additional time to difficult topics.
- Practice previous-year question papers regularly.
- Make short notes for General Awareness and current affairs.
- Revise mathematical formulas frequently.
- Practice reasoning questions to improve speed and accuracy.
- Work on English and Hindi grammar and comprehension.
- Take regular mock tests to improve time management.
- Revise important topics repeatedly before the examination.
FAQs
Is there an interview for DSSSB ASO?
No. There is no interview for the DSSSB ASO post. Selection is based on the prescribed written examination stages and subsequent verification requirements.
What is the DSSSB ASO Tier 1 exam?
Tier 1 is an objective-type computer-based examination consisting of 200 questions for 200 marks.
Is there negative marking in the DSSSB ASO exam?
Yes. 0.25 marks are deducted for each incorrect MCQ answer.
What subjects are included in DSSSB ASO Tier 1?
The Tier 1 exam includes General Awareness, General Intelligence & Reasoning, Arithmetical & Numerical Ability, Hindi Language & Comprehension, and English Language & Comprehension.
Is Computer Knowledge included in the DSSSB ASO syllabus?
Yes. Computer Proficiency is included in Tier 2.