BD Police SI Written study guide

বাংলা ভাষা ও সাহিত্য

English Language and Literature

Written English tests grammar (tense, subject-verb agreement, articles, prepositions, voice, narration, conditionals), vocabulary (synonyms, antonyms, idioms, one-word substitution, spelling), and comprehension, plus a light literature component (major writers, periods, and famous works). Candidates should be able to identify parts of speech, correct a faulty sentence, and choose the right tense for a time marker.

General Mathematics and Mental Ability

This section rewards speed with accuracy: arithmetic (percentage, profit-loss, ratio, average, simple and compound interest, time-work, speed-distance), elementary algebra, basic geometry and mensuration, and mental ability (number series, analogy, coding-decoding, direction sense, blood relations, odd-one-out, clock and calendar). Percentage questions hide the base: a 20% rise followed by a 20% fall does not return to the original value (net 4% fall).

General Knowledge and Current Affairs

This domain covers static general knowledge (world geography, capitals, currencies, international organisations, science basics, sports, awards) and current affairs (national and international events, appointments, summits, treaties, economic indicators). A police sub-inspector is expected to know Bangladesh's administrative setup, major national institutions, and recent developments.

Bangladesh Studies: History, Geography, and Liberation War

This section joins three strands. History covers ancient Bengal, the medieval period, the British era, the Pakistan period, and post-1971 developments.

Constitution, Law, and Legal Procedure

Candidates must know the Constitution of Bangladesh (its preamble, fundamental rights, directive principles, structure of government, and amendment procedure) and the basic framework of criminal and civil law: the Penal Code, the Code of Criminal Procedure, the Evidence Act, and special laws relevant to policing. Key ideas include offence, cognizable and non-cognizable cases, arrest, bail, remand, charge, trial, appeal, and the presumption of innocence.

Police Administration, Investigation, and Law Enforcement

This domain tests how a police station actually works: hierarchy and ranks, the role of the officer-in-charge, case registration, investigation steps, evidence collection, arrest and custody, community policing, traffic and crowd management, and accountability mechanisms. Investigation knowledge includes the case diary, seizure list, witness statements, site sketch, and the final report.

Information Technology and Computer Skills

Expect questions on computer fundamentals (hardware, software, input-output devices, memory units), operating systems and file management, word processing and spreadsheets, internet and networking basics (IP address, browser, email, URL, LAN/WAN), and cyber safety (password hygiene, phishing, malware, digital signatures). Awareness of e-governance and police IT systems is increasingly relevant.

Descriptive Writing and Analytical Ability

This paper tests structured writing: paragraph or essay writing, report writing, letter or application writing, précis, and short analytical answers on social or administrative issues. Examiners reward a clear structure (introduction, body, conclusion), relevance to the prompt, coherent paragraphs, correct grammar, and a reasoned position rather than decorative language.