Rajasthan Police SI cheat sheet

Rajasthan borders Pakistan along roughly 1,070 km across Jaisalmer, Bikaner, Sri Ganganagar and Barmer; Jaisalmer has the longest stretch of the border district line.

Thar Desert covers about 61–62% of Rajasthan's area; the state's total area is 342,239 sq km, the largest in India.

Key Rajasthan hills: Aravalli (oldest fold mountains, Guru Shikhar 1,722 m highest peak), Vindhya and Aravalli separation by the Banas; Chambal is the only perennial river of the state.

Rajasthan's major lakes: Sambhar (salt), Pushkar (freshwater, Brahma temple), Pichola and Fateh Sagar (Udaipur); Keoladeo Ghana near Bharatpur is a Ramsar wetland and UNESCO site.

Rajasthan divisions count 7 (Jaipur, Jodhpur, Ajmer, Kota, Udaipur, Bikaner, Bharatpur) with 33 districts as per the latest reorganisation.

Indian Constitution key dates: adopted 26 November 1949, came into force 26 January 1950; Fundamental Duties added by 42nd Amendment 1976 on Swaran Singh Committee recommendation.

Current affairs anchors: G20 Summit 2023 held in New Delhi under India's presidency; Chandrayaan-3 landed near lunar south pole on 23 August 2023; Aditya-L1 launched September 2023.

Number series rule: check differences, then ratios, then squares/cubes; alternating series often combine two arithmetic progressions.

Coding-decoding: map letter positions (A=1 to Z=26); reverse alphabet value = 27 − position; check shift patterns forward/backward before assuming reversal.

Blood relations: draw a family tree with gender symbols; vertical lines for generations, horizontal for siblings/spouse; never assume gender from a name alone.

Direction sense: use a compass sketch; net displacement uses Pythagoras when movements are perpendicular; facing-direction rotations use clockwise (+) and anticlockwise (−).

Syllogism: Venn diagram method; 'some' does not imply 'all'; conclusions with 'only a few' require both existence and non-universality.

Seating arrangement: fix the reference person first, then place left/right according to facing direction (facing north: left = west; facing south: left = east).

Clock and calendar: angle between hands = |30H − 5.5M|; odd days - ordinary year 1, leap year 2; century odd days: 100 yr = 5, 200 = 3, 300 = 1, 400 = 0.

Percentage change: successive changes a% then b% give net = a + b + ab/100; if price rises by r%, consumption must fall by 100r/(100+r)% to keep expenditure constant.

Profit and loss: SP = CP(100+P)/100; discount on marked price; two articles sold at same price with equal profit and loss percentages always yield a net loss of (x/10)²%.

Time-speed-distance: km/h to m/s multiply by 5/18; relative speed adds for opposite direction, subtracts for same direction; train crossing a pole uses its own length only.

Time and work: use LCM of days as total work units; efficiency is inversely proportional to time; pipes filling (+) and emptying (−) are combined algebraically.

Simple and compound interest: SI = PRT/100; CI = P[(1+R/100)^T − 1]; difference between CI and SI for 2 years = P(R/100)².

Average and mixture: average = sum/count; alligation rule (cheaper quantity : dearer quantity) = (dearer − mean) : (mean − cheaper).

Mensuration: circle area πr², circumference 2πr; sphere volume 4/3πr³, surface 4πr²; cylinder volume πr²h, curved surface 2πrh; cone volume 1/3πr²h.

Permutation and combination: nPr = n!/(n−r)!; nCr = n!/[r!(n−r)!]; probability = favourable/total outcomes; at least one = 1 − P(none).

संधि: स्वर संधि (दीर्घ, गुण, वृद्धि, यण, अयादि), व्यंजन संधि एवं विसर्ग संधि - जैसे सूर्य + उदय = सूर्योदय (गुण संधि)।

समास के भेद: तत्पुरुष (अंतिम पद प्रधान), कर्मधारय (विशेषण-विशेष्य), द्विगु (संख्यावाची), द्वंद्व (दोनों पद प्रधान), बहुव्रीहि (अन्य पद प्रधान), अव्ययीभाव (पूर्व पद अव्यय)।

कारक एवं विभक्ति: कर्ता में 'ने', कर्म में 'को', करण में 'से/के द्वारा', संप्रदान में 'के लिए', अपादान में 'से' (अलगाव), अधिकरण में 'में/पर'।

वाच्य: कर्तृवाच्य, कर्मवाच्य, भाववाच्य; कर्मवाच्य में क्रिया कर्म के अनुसार बदलती है - 'राम ने पत्र लिखा' → 'राम के द्वारा पत्र लिखा गया'।

अलंकार: अनुप्रास (वर्ण आवृत्ति), उपमा (समानता), रूपक (अभेद आरोप), उत्प्रेक्षा (मानो/जनु), यमक (शब्द आवृत्ति भिन्न अर्थ), श्लेष (एक शब्द अनेक अर्थ)।

शब्द शुद्धि एवं वाक्य शुद्धि: 'उज्ज्वल', 'द्वारा', 'पुनरुक्ति दोष', 'अशुद्धि' जैसे प्रश्नों में मानक रूप याद रखें; 'वहाँ' स्थानवाचक, 'वहीं' निश्चयवाचक।

पत्र लेखन प्रारूप: प्रेषक पता, दिनांक, प्राप्तकर्ता पता, विषय, संबोधन, मुख्य भाग, समापन एवं हस्ताक्षर; औपचारिक पत्र में विषय अनिवार्य।

Subject-verb agreement: 'one of + plural noun' takes singular verb; collective nouns take singular verb when acting as a unit; 'each, either, neither' are singular.

Tenses: present perfect (has/have + V3) for past action with present relevance; past perfect for the earlier of two past actions; 'since' with point of time, 'for' with duration.

Articles: 'a' before consonant sound, 'an' before vowel sound (an hour, a university); 'the' for unique/superlative/specific nouns.

Prepositions: 'good at', 'afraid of', 'composed of', 'deprived of', 'superior to', 'prefer to', 'married to', 'capable of' - fixed collocations tested directly.

Active to passive: object becomes subject, verb becomes be + V3, subject becomes 'by' agent; imperative passive uses 'Let + object + be + V3'.

Direct to indirect speech: change tense one step back, change pronouns per subject/object rule, 'this' → 'that', 'today' → 'that day', 'tomorrow' → 'the next day'.

Vocabulary strategy: synonyms/antonyms, one-word substitutions (altruist, pessimist, omnipotent, ubiquitous), idioms (a bolt from the blue, to beat about the bush), and cloze context clues.

Constitution: Part III Fundamental Rights (Articles 12–35); Article 21 right to life and personal liberty; Article 32 writ jurisdiction of Supreme Court (Ambedkar called it heart and soul of the Constitution).

Writs: Habeas Corpus (illegal detention), Mandamus (public duty), Prohibition (lower court exceeding jurisdiction), Certiorari (quashing order), Quo Warranto (public office).

IPC core sections: 302 murder punishment, 304 culpable homicide not amounting to murder, 307 attempt to murder, 376 rape, 379 theft, 392 robbery, 395 dacoity, 420 cheating, 498A cruelty by husband/relatives.

CrPC procedure: FIR under Section 154, investigation under 156, arrest under 41, bail under 437/439, charge sheet under 173, cognizable vs non-cognizable and bailable vs non-bailable distinctions.

Evidence Act 1872: Section 3 definitions, Section 25 confession to police inadmissible, Section 27 discovery statement admissible, Section 32 dying declaration, Section 45 expert opinion, Section 65 secondary evidence.

Other statutes: Rajasthan Police Act 2007 governs state police organisation; Juvenile Justice Act 2015 (child in conflict with law under 18); POCSO Act 2012; NDPS Act 1985; IT Act 2000 Section 66C identity theft.

Legal maxims: actus reus (guilty act), mens rea (guilty mind), res judicata, audi alteram partem, ipso facto, suo motu - commonly asked in police SI papers.

Number systems: binary base 2, octal base 8, decimal base 10, hexadecimal base 16; 1 KB = 1024 bytes, 1 MB = 1024 KB, 1 GB = 1024 MB.

Hardware: CPU (ALU + Control Unit + registers), RAM volatile primary memory, ROM non-volatile, cache fastest memory, SSD vs HDD storage difference.

Software categories: system software (OS, drivers) vs application software; examples of OS: Windows, Linux, Android, macOS, Unix.

MS Office: Excel formula starts with '=', cell reference A1, functions SUM/AVERAGE/COUNTIF; Word shortcuts Ctrl+C copy, Ctrl+V paste, Ctrl+Z undo, Ctrl+S save.

Networking: LAN, WAN, MAN; IP address IPv4 is 32-bit, IPv6 is 128-bit; HTTP/HTTPS protocols, DNS resolves domain to IP, URL structure.

Cyber threats: phishing, malware, ransomware, trojan, keylogger, SQL injection; firewall and antivirus roles; IT Act 2000 Sections 66, 66C, 66D, 67 cover computer offences.

Shortcut keys and terms: Ctrl+P print, Alt+F4 close, F5 refresh, Ctrl+Shift+Esc task manager; 'bit' smallest unit, 'byte' 8 bits; cloud computing IaaS, PaaS, SaaS.

Rajasthan Police Act 2007: defines police establishment, duties of police officers, Police Commissioner system in major cities, and Rajasthan State Police Complaints Authority.

Police ranks in Rajasthan: DGP → ADGP → IG → DIG → SP → ASP/Addl. SP → DSP → Inspector → Sub-Inspector → ASI → Head Constable → Constable.

Public order tools: Section 144 CrPC (urgent prohibitory orders), Section 107 CrPC (security for keeping peace), preventive detention laws, and use of force principles (minimum necessary force, proportionality).

Community policing schemes: Jan Sampark, Apka Police Station, Rajasthan Police helpline 100 and women helpline 1090, child helpline 1098, cyber helpline 1930.

Social awareness: Beti Bachao Beti Padhao, Swachh Bharat Mission, Ayushman Bharat, Jal Jeevan Mission, PM-KISAN - flagship schemes often asked in SI papers.

Rajasthan human rights institutions: State Human Rights Commission, State Women's Commission, Child Rights Protection Commission, SC/ST Commission - constitutional/statutory bodies relevant to police work.

Traffic and Motor Vehicles Act 2019 amendments: enhanced penalties for drunk driving, speeding, driving without licence; e-challan system and CCTV enforcement.