BPSC Mains: a strategy for GS I and GS II

Clear the Prelims, and the real contest begins. In BPSC Mains, GS I and GS II carry 300 marks each, which is two-thirds of the 900 written merit marks. Together with the Essay, they decide whether you make the final list and which post you get. Yet many candidates walk into these papers with Prelims-style knowledge and very little writing practice.

Prelims asks whether you recognise a fact. Mains asks whether you can use facts to build an argument, in your own words, against the clock. That is a trainable skill, and this guide is about training it.

What each paper covers

Notice what is not here compared with UPSC: there is no separate ethics paper, no internal security paper and no world history. The BPSC syllabus is narrower, but it goes deeper into Bihar.

How questions are framed

BPSC Mains questions are descriptive. They ask you to discuss, examine, evaluate, explain or analyse, and they often carry an explicit Bihar angle. Typical framings look like this:

• "Discuss the role of Bihar in the Quit India Movement."
• "Examine the causes of recurring floods in north Bihar and suggest measures."
• "Evaluate the impact of prohibition on Bihar's society and economy."
• "Analyse the given data on Bihar's sectoral growth and comment on the trends."

Each directive word asks for something different. Discuss wants several sides. Examine wants causes and evidence. Evaluate wants a judgement, with reasons for and against. Analyse wants you to break the thing into parts and show how they connect. Read the verb before you read the topic, and let it decide the shape of your answer.

A structure that works

1. Introduction: a definition, fact or context in two or three lines.
2. Body: separated points or short paragraphs under subheadings, covering every part of the question.
3. Bihar examples: specific, accurate and relevant.
4. Conclusion: balanced and forward-looking, usually one to three lines.

A worked outline

Take the flood question above. Here is how a one-minute plan might look before you write a word.

• Introduction: North Bihar is a low, flat plain crossed by rivers that rise in the Himalaya of Nepal, such as the Kosi, Gandak, Bagmati, Kamla and Mahananda. Floods here are an annual event, not a rare disaster.
• Causes (natural): heavy monsoon rain in the upstream catchment, very high silt loads, a gentle gradient that slows drainage, and rivers that shift course. The Kosi's long westward migration is the textbook case.
• Causes (human-made): embankment breaches, such as the Kosi breach at Kusaha in Nepal in August 2008; drainage congestion behind embankments; encroachment on flood plains.
• Measures: flood forecasting and data-sharing with Nepal; maintenance of embankments; early warning down to the panchayat; flood-plain zoning; better drainage; long-term storage and sediment solutions discussed jointly with Nepal.
• Conclusion: move from flood control to flood management, and learn to live with the river as well as defend against it.

Both parts of the question are covered, there is one precise Bihar event with a place and a year, and the conclusion offers a direction instead of a summary.

The statistics section

GS I includes statistical analysis, graphs and diagrams. Typical tasks include:

• calculating averages, percentages, ratios and growth rates;
• reading tables and charts;
• drawing a simple bar or pie chart from data;
• basic ideas such as mean, median and mode.

This is the one part of the paper where a correct answer is simply correct. Here is the level to aim for, with hypothetical figures:

• Growth rate: a district's output rises from ₹500 crore to ₹560 crore. Growth = (560 − 500) ÷ 500 × 100 = 12%.
• Mean and median: yields of 12, 15, 9 and 14 quintals per hectare. Mean = 50 ÷ 4 = 12.5. Arranged in order (9, 12, 14, 15), the median is the average of the middle two, (12 + 14) ÷ 2 = 13.
• Pie chart: a sector that forms 25% of the total gets 25% of 360°, which is 90°.

Practise regularly with Class 10–12 level problems until these take seconds. Our guide to statistics and data in BPSC GS has more worked examples.

Budgeting three hours

A simple rule gives you a time budget for any mark value. Keep about 10 minutes for reading the paper and a final check. That leaves 170 minutes for 300 marks, or roughly 0.57 minutes per mark.

Whatever marks the actual paper assigns, multiply by 0.57 and keep to it. When the time for a question is up, write the conclusion and move on. A half-finished last question costs far more than a slightly shorter fifth one.

On statistics, decide in practice whether you do it first (if you are confident and want the marks banked) or in a fixed block later. Either works. Changing your mind in the exam hall does not.

Hindi or English

Most BPSC candidates write in Hindi. Either medium works if you use standard terms consistently, such as संघवाद (federalism) and राजकोषीय घाटा (fiscal deficit). Our guide on writing BPSC in Hindi or English helps you decide.

A practice routine

The rewriting step is the one most people skip. Take one evaluated answer a week and rewrite it with the feedback applied. That is where improvement actually happens.

Sources

• Standard books for modern history, polity, economy and geography.
• A reliable Bihar-specific text for history, culture and geography.
• The Bihar Economic Survey and the state budget for the economy.
• Newspapers for current affairs and examples.
• Previous-year BPSC Mains papers.

Common mistakes

• Ignoring the Bihar dimension, or using Bihar examples you have not verified.
• Skipping statistics practice because it feels like maths.
• Poor presentation: no paragraphs, no subheadings, no space between answers.
• Not finishing the paper.

Practice set

Plan each in one minute, then check against the notes.

1. "Evaluate the impact of prohibition on Bihar's society and economy." Which directive word decides the shape?
2. A crop's area falls from 80,000 to 72,000 hectares. What is the percentage change?
3. A question carries 38 marks. Roughly how long should you spend?
4. Give one precise Bihar example for an answer on the Quit India Movement.

Answers:

1. Evaluate. You need both sides (for example, social gains reported by households and the loss of excise revenue, enforcement burden and illicit trade), then a reasoned judgement. The law is the Bihar Prohibition and Excise Act, 2016.
2. (72,000 − 80,000) ÷ 80,000 × 100 = −10%, a fall of 10 per cent.
3. 38 × 0.57 ≈ 22 minutes.
4. The Patna Secretariat firing of 11 August 1942, in which seven students were killed while trying to hoist the national flag; the Martyrs' Memorial (Shaheed Smarak) in Patna commemorates them.

What to do next

• Download the last two BPSC Mains GS papers and note the number of questions and marks per question.
• Start a Bihar example bank, one page per syllabus area.
• Write one answer a day this week, timed, using the four-part structure.
• Solve ten statistics problems this week.
• Read our step-by-step guide to answer writing for BPSC Mains.