BPSC AEDO Exam Pattern 2026: Papers, Marks and Marking Scheme

The BPSC AEDO exam pattern is built around one written stage: three objective papers of 100 questions each, conducted by the Bihar Public Service Commission (BPSC) to fill 935 posts of Assistant Education Development Officer under Advertisement No. 87/2025. There is no preliminary exam and no interview, so the written test decides almost everything.

This guide explains each paper, the qualifying rules for the language paper, negative marking, the category-wise minimum marks, the score normalisation BPSC added in December 2025, and how the final merit list is prepared. The written exam held from 14 to 21 April 2026 was cancelled by BPSC over malpractice reports, and the re-exam date has not been announced yet. The pattern itself has not been changed, so you can prepare for it now.

Table of Contents

BPSC AEDO Exam Pattern

Use this table as a quick reference before going into the details of each paper.

Paper-wise BPSC AEDO Exam Pattern

All three papers carry equal marks and equal time, but they do not play the same role. Paper 1 is a gate you must pass. Papers 2 and 3 decide your rank.

Paper 2: General Studies

General Studies tests broad awareness rather than subject depth. Expect questions from general science, current events of national and international importance, Indian history with a clear focus on Bihar, Indian and Bihar geography, Indian polity and economy, the national movement, and changes in Bihar's economy after independence. Bihar-specific questions are a recurring feature of BPSC papers, so they deserve dedicated revision time.

Paper 3: General Aptitude

General Aptitude combines basic arithmetic with reasoning. Number system, percentages, ratio and proportion, averages, profit and loss, and simple data handling sit alongside analogy, series, coding-decoding, relationships and problem-solving questions. This paper rewards speed and method more than memory, which makes it the easiest place to improve quickly with timed practice.

General Language Paper: The Qualifying Rule

Paper 1 has two parts: General Hindi worth 70 marks and General English worth 30 marks. Marks from this paper are not added to your merit score. However, you must score at least 30% in each part separately. If you fall short in either part, your General Studies and General Aptitude answer sheets are not considered for the merit list.

Note the word "separately". A strong Hindi score does not cover a weak English score. Candidates from Hindi-medium backgrounds often underestimate the English part, and 9 marks after negative marking is not a target to leave to chance.

Marking Scheme and Negative Marking

Each correct answer earns 1 mark. Each wrong answer costs 1/3 of a mark. A question you leave blank neither adds nor deducts anything.

• Example: You attempt 80 questions in General Studies and get 64 right and 16 wrong. Your score is 64 minus 16 x 1/3, which is about 58.67 out of 100.

• Cost of a wrong answer: Three wrong answers wipe out one correct answer. Ten careless mistakes in a paper cost you more than three marks.

• Time per question: 120 minutes for 100 questions gives you about 72 seconds per question, including time to fill the OMR sheet.

Should you guess?

On a four-option question, a completely blind guess has an expected value of roughly zero: the chance of a correct mark is balanced by the penalty for a wrong one. Once you can rule out even one option with confidence, the odds turn in your favour, and ruling out two options makes the attempt clearly worth it. The practical rule is simple: skip pure guesses, attempt educated ones.

Minimum Qualifying Marks and Merit List

Clearing the language paper is only the first condition. Candidates also need to reach a minimum percentage in the merit papers, which varies by category. These minimums follow the standard BPSC pattern.

Meeting the minimum makes you eligible for the merit list. It does not guarantee a post. With roughly 9.7 lakh registered candidates for 935 posts, the actual cut-off is likely to sit well above these minimums.

How merit is calculated

The merit list is prepared from the combined marks of General Studies and General Aptitude, out of 200. If two or more candidates have the same total, the tie is reported to be broken first by higher marks in General Studies, then by age (the older candidate ranks higher), and then by alphabetical order of name. Check the official notification for the exact wording before relying on the tie-break order.

Score Normalisation Across Shifts

This is the change most pages leave out. In its December 2025 corrigendum, BPSC announced that the exam would be held in phases and that results would be prepared using the equipercentile equating method.

When lakhs of candidates take different question papers on different days, one set can turn out slightly harder than another. Equipercentile equating compares candidates by their relative position within their own shift. A candidate who did better than 90% of their shift is placed level with a candidate who did better than 90% of another shift, even if their raw marks differ.

• Raw marks are not your final marks: Your score after normalisation can be higher or lower than your raw score.

• A hard paper is not a disaster: If your shift found the paper tough, your percentile still counts.

• Answer-key estimates are rough: Any score you calculate from an answer key before results is only an approximation of your normalised score.

How the Papers Are Scheduled on Exam Day

In the April 2026 schedule, BPSC split candidates into three phases. Each candidate sat all three papers over two consecutive days, in a fixed order.

The three phases ran on 14 and 15 April, 17 and 18 April, and 20 and 21 April 2026. That exam has been cancelled, and the re-exam schedule may follow a different structure. Your admit card will confirm your actual dates and shifts.

The practical point is stamina. Two full papers on the first day means four hours of exam time with a break of about two and a half hours. Practise two back-to-back mocks on the same day at least a few times before the exam.

What the Pattern Means for Your Preparation

• Secure the language paper first: It carries no merit, but failing it cancels everything else. Aim for a comfortable margin in both Hindi and English, not the bare 30%.

• Put most of your hours into Papers 2 and 3: Every one of your 200 merit marks comes from General Studies and General Aptitude.

• Treat Aptitude as your scoring lever: Arithmetic and reasoning respond quickly to daily timed practice, and a strong Aptitude score can offset a moderate GS score.

• Build Bihar GK as a separate block: Bihar history, geography and economy appear often enough to justify their own notes and revision cycle.

• Track accuracy, not just attempts: With 1/3 negative marking, 85 attempts at 75% accuracy scores less than 75 attempts at 90% accuracy.

The easiest way to build this habit is to sit full-length papers under exam conditions and study the analysis afterwards.

BPSC AEDO Selection Process

1. Written examination: Three objective papers as described above. You must clear 30% in each part of the language paper and reach your category's minimum in the merit papers.

2. Merit list: Prepared from normalised General Studies and General Aptitude marks, category-wise and as per reservation rules.

3. Document verification: Shortlisted candidates submit original certificates for age, qualification, category, domicile and any other claim made in the application.

4. Final selection: Candidates whose documents are verified are recommended for appointment.

There is no interview, skill test or physical test for this post. Before you invest months in preparation.

Common Mistakes on Older Pages

Because this recruitment has been rescheduled more than once, many pages online carry outdated or conflicting information. Watch out for these errors:

• An interview stage: Some pages mention an interview or departmental test. The AEDO selection is based on the written exam and document verification only.

• Language marks in merit: Paper 1 is qualifying. Its marks are not added to your total.

• No mention of normalisation: Pages written before December 2025 do not reflect the equipercentile method.

• Old exam dates: The January 2026 dates were postponed and the April 2026 exam was cancelled. Follow only the latest notice.

When in doubt, follow the official notices on the BPSC website and your candidate dashboard on the BPSC online application portal. Once you know the pattern well, the next step is to map each paper to its topics and start timed practice, so the exam pattern becomes a plan rather than a table.