ProSyllabus Journal CBSE Class 12 Board Examination Complete Summary and Solutions for Database Concepts – NCERT Class XII Computer Science, Chapter 8 – File Systems, DBMS, Relational Models, Keys, SQL Introduction, Questions, Answers Detailed summary and explanation of Chapter 8 'Database Concepts' from the Computer Science textbook for Class XII, covering the limitations of file systems, introduction to database management systems, relational data model, database schema, keys like primary and foreign key, metadata, and basics of SQL—along with all NCERT questions, answers, and exercises for thorough understanding.
Updated 2 weeks ago NCERT · Class XII · Computer Science · Chapter 8 · Database Concepts · DBMS · Relational Model · Keys · SQL · Summary · Questions · Answers · Programming · Comprehension
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Database Concepts - Class 12 Computer Science Chapter 8 Ultimate Study Guide 2025
Full Chapter Summary & Detailed Notes
Key Definitions & Terms
60+ Questions & Answers
Key Concepts
Table Examples & Schemas
Interactive Quiz (10 Q)
Quick Revision Notes & Mnemonics
Key Terms & Processes
Database Processes Step-by-Step
Full Chapter Summary & Detailed Notes - Database Concepts Class 12 NCERT
Overview & Key Concepts
Chapter Goal : Understand file system limitations, DBMS advantages, relational model (tables, keys), data organization. Exam Focus: Limitations (A-F), Tables 8.1-8.6, Fig 8.1-8.5, Keys; 2025 Updates: Emphasis on NoSQL vs RDBMS. Fun Fact: Quote on inconsistency ties to redundancy. Core Idea: Centralized data avoids chaos; from files to relations. Real-World: School DB. Expanded: All subtopics point-wise with evidence (e.g., Table 8.4 snapshots), examples (e.g., GUID foreign key), debates (e.g., file vs DBMS cost).Wider Scope : From manual records to relational schemas; sources: Tables (8.1-8.7), figures (8.1-8.5).Expanded Content : Include modern aspects like ER diagrams, normalization; point-wise for recall; add 2025 relevance like cloud DBs.
Introduction & Manual Limitations
Manual Records : Attendance (50x26 entries/month); issues: Tedious, loss, errors.Office Files : Student/guardian details; search/modify hard.Computerized Need : Copy, find, add, modify, delete easily.Expanded : Evidence: Activity 8.1 shops; debates: Manual vs digital cost; real: Post-2020 online schools.
Conceptual Diagram: Manual to Digital Flow
Flow: Manual Register → Limitations (Redundancy) → Files (Partial) → DBMS (Relations + Keys). Ties to Fig 8.2.
Why This Guide Stands Out
Comprehensive: All subtopics point-wise, table integrations; 2025 with normalization, processes analyzed for schemas.
File System
Files : Containers (text, CSV, images); access via programs.Example Tables : STUDENT (Table 8.1: Roll, Name, DOB, Guardian), ATTENDANCE (8.2: Date, Roll, Status).Limitations (A-F) : Access (no mech), Redundancy (dup names), Inconsistency (mismatch), Isolation (no links), Dependence (struct change), Sharing (no control).Expanded : Evidence: Roll 3/5 same guardian; real: School promotion copy fails.
Quick Table: STUDENT (Partial - Table 8.1)
Roll SName SDateofBirth GName GPhone GAddress 1 Atharv Ahuja 2003-05-15 Amit Ahuja 5711492685 G-35, Ashok Vihar, Delhi 2 Daizy Bhutia 2002-02-28 Baichung Bhutia 7110047139 Flat no. 5, Darjeeling Appt., Shimla
DBMS
Definition : Software for create/manage DB; examples: MySQL, Oracle.Abstract View : Hides storage; interface for users/programs.Applications (Table 8.3) : Banking (accounts), Inventory (orders).File to DBMS : Split STUDENT (add GUID), remove dup SName; links via Roll/GUID.Tables 8.4-8.6 : STUDENT, GUARDIAN, ATTENDANCE snapshots.Environment (Fig 8.2) : Users query → DBMS → Catalog/DB → Results.Expanded : Evidence: GUID unique; debates: DBMS cost (hardware/training).
Key Concepts in DBMS
Schema : Design (tables, types, constraints, relations).Constraints : Restrictions (e.g., NOT NULL, UNIQUE on Roll).Meta-data : Data about data (catalog).Instance : Snapshot at time; changes via queries/manipulation.Query : Request info (SQL, next chapter).Manipulation : Insert/Delete/Update.Engine : Core for create/handle queries.Expanded : Evidence: NULL for unknown; real: Backup costs.
Relational Data Model
Overview : Tables (relations) with rows (tuples), columns (attributes).Terms (Fig 8.4) : Attribute (e.g., GName), Tuple (row), Domain (values set), Degree (cols=4), Cardinality (rows=5).Properties (3) : Unique attr names/seq immaterial; Distinct tuples/seq immaterial; Same domain/atomic/NULL.Schemas (Table 8.7) : STUDENT(Roll, SName, DOB, GUID), etc.Expanded : Evidence: Flat file; debates: Relational vs hierarchical.
Quick Table: GUARDIAN (Partial - Table 8.5)
GUID GName GPhone GAddress 444444444444 Amit Ahuja 5711492685 G-35, Ashok Vihar, Delhi 111111111111 Baichung Bhutia 3612967082 Flat no. 5, Darjeeling Appt., Shimla
Keys in Relational DB
Need : Unique tuples; at least one distinct attr.Candidate : Any unique attr (e.g., GUID, GPhone).Primary : Chosen candidate (e.g., GUID; others alternate).Composite : Multi-attr (e.g., {Roll, Date} in ATTENDANCE).Foreign : Links tables (e.g., Roll in ATTENDANCE → STUDENT; GUID in STUDENT → GUARDIAN; Fig 8.5).Expanded : Evidence: NULL allowed in FK; real: Referential integrity.
Summary & Exercise
Key Takeaways : Files limited; DBMS centralizes; Relations link via keys; Constraints ensure integrity.Exercise Tease : Differentiate keys; design schemas; Q on tables.
Key Definitions & Terms - Complete Glossary
All terms from chapter; detailed with examples, relevance. Expanded: 30+ terms grouped by subtopic; added advanced like "Referential Integrity", "Normalization" for depth/easy flashcards.
File System
Container for data (CSV, text). Ex: STUDENT.txt. Relevance: Basic storage, but limited.
DBMS
Software for DB management. Ex: MySQL. Relevance: Centralized access.
Database
Related data collection. Ex: STUDENTATTENDANCE. Relevance: Logical organization.
Schema
DB design (tables, constraints). Ex: STUDENT(Roll PK). Relevance: Structure blueprint.
Constraint
Data restriction. Ex: UNIQUE Roll. Relevance: Integrity.
Meta-data
Data about data. Ex: Catalog. Relevance: Dictionary.
Instance
DB snapshot. Ex: Populated tables. Relevance: Current state.
Query
Info request. Ex: Find presents. Relevance: Retrieval (SQL).
Relation
Table in relational model. Ex: GUARDIAN. Relevance: Data storage.
Attribute
Column. Ex: GName. Relevance: Feature.
Tuple
Row. Ex: Amit Ahuja record. Relevance: Entity instance.
Domain
Attribute values set. Ex: Integers for Roll. Relevance: Type limit.
Degree
Number of attributes. Ex: 4 for GUARDIAN. Relevance: Width.
Cardinality
Number of tuples. Ex: 5 for GUARDIAN. Relevance: Size.
Primary Key
Unique identifier. Ex: GUID. Relevance: Distinction.
Foreign Key
Link to another table. Ex: Roll in ATTENDANCE. Relevance: Relation.
Candidate Key
Potential primary. Ex: GPhone. Relevance: Alternatives.
Composite Key
Multi-attribute PK. Ex: {Roll, Date}. Relevance: Combined unique.
Data Redundancy
Dup data. Ex: Names in two files. Relevance: Waste/inconsistency.
Data Inconsistency
Mismatch dup. Ex: Name spelling diff. Relevance: Errors.
NULL
Unknown/non-applicable. Ex: No phone. Relevance: Flexibility.
Referential Integrity (Advanced)
FK matches PK. Ex: Valid GUID. Relevance: Valid links.
Normalization (Advanced)
Reduce redundancy. Ex: Split tables. Relevance: Efficiency.
Tip: Group by model/keys; examples for recall. Depth: Debates (e.g., NULL risks). Historical: Codd's relational. Interlinks: To SQL Ch9. Advanced: Joins. Real-Life: E-commerce DB. Graphs: Schema Fig 8.5. Coherent: Evidence → Interpretation. For easy learning: Flashcard per term with table snippet.
60+ Questions & Answers - NCERT Based (Class 12) - From Exercises & Variations
Based on chapter + expansions (e.g., Ex Q1-13). Part A: 10 (1 mark, one line), Part B: 10 (3 marks, four lines), Part C: 10 (4 marks, six lines), Part D: 10 (6 marks, eight lines). Answers point-wise in black text. Include tables where apt.
Part A: 1 Mark Questions (10 Qs - Short)
1. What is a file system?
3. Name one limitation of file system.
6. What is degree of a relation?
7. Example of foreign key?
Part B: 3 Marks Questions (10 Qs - Medium, Exactly 4 Lines Each)
1. Differentiate file system vs DBMS.
2. List 3 file limitations with examples.
3. Explain data redundancy.
4. What is DBMS? Give examples.
5. Define schema and instance.
6. Explain attribute and tuple.
7. What are 3 properties of relation?
8. Differentiate degree vs cardinality.
10. What is foreign key? Example.
Part C: 4 Marks Questions (10 Qs - Medium-Long, Exactly 6 Lines Each)
1. Explain file system limitations (A-C).
2. Describe file to DBMS conversion.
4 Marks Answer:
Split STUDENT to GUARDIAN.
Add GUID unique.
Remove SName from ATTENDANCE.
Link via FK.
Ex: Tables 8.4-8.6.
Reduces dup.
3. Explain relational model terms.
4. List 3 relation properties.
5. Differentiate primary vs foreign key.
6. What is composite key? Example.
7. Explain DBMS key concepts (A-C).
9. Describe data isolation.
10. Role of NULL in relations.
Part D: 6 Marks Questions (10 Qs - Long, Exactly 8 Lines Each)
1. Justify: File system causes inconsistency; how DBMS avoids.
2. Design STUDENTATTENDANCE schema; explain changes.
6 Marks Answer:
STUDENT(Roll PK, SName, DOB, GUID FK).
GUARDIAN(GUID PK, GName, GPhone, GAddress).
ATTENDANCE({Date,Roll} PK, Status).
Changes: Split guardian, add GUID.
Remove SName dup.
Ex: Tables 8.4-8.6.
Fig 8.1 structure.
Reduces redundancy.
3. Explain 3 relation properties with examples.
4. Differentiate candidate, primary, composite keys.
5. Explain DBMS concepts: Schema, Constraints, Instance.
6. How does foreign key establish relations? Diagram.
6 Marks Answer:
FK = ref PK.
Ex: Roll FK in ATTENDANCE to STUDENT PK.
Links data.
Fig 8.5: Arrows from FK to PK.
Primary: Master table.
Referencing: Child.
NULL if optional.
Ensures integrity.
7. Analyze GUARDIAN relation (Fig 8.4).
8. Why controlled sharing in DBMS? Limitations.
9. DBMS vs File: Redundancy/Inconsistency examples.
10. Relational model advantages; properties role.
Tip: Include tables in ans; practice design. Additional 30 Qs: Variations on exercises, key scenarios.
Key Concepts - In-Depth Exploration
Core ideas with examples, pitfalls, interlinks. Expanded: All concepts with steps/examples/pitfalls for easy learning. Depth: Debates, analysis.
File Limitations
Steps: 1. Grow files, 2. Access hard, 3. Dup/inconsist. Ex: Table 8.1 dup. Pitfall: Manual updates miss. Interlink: To DBMS. Depth: A-F details.
DBMS
Steps: 1. Create DB, 2. Query/manipulate, 3. Abstract. Ex: MySQL. Pitfall: High cost. Interlink: Apps Table 8.3. Depth: Engine role.
Schema
Steps: 1. Define tables/constraints, 2. Store in catalog. Ex: STUDENT schema. Pitfall: Poor design = issues. Interlink: Instance. Depth: Logical arch.
Constraints
Steps: 1. Apply on create (UNIQUE), 2. Enforce integrity. Ex: NOT NULL DOB. Pitfall: Over-constrain slows. Interlink: Keys. Depth: Accuracy.
Relation
Steps: 1. Table with tuples/attrs, 2. Linked. Ex: GUARDIAN. Pitfall: No FK = isolation. Interlink: Model. Depth: Flat file.
Attribute/Tuple
Steps: 1. Col/row define entity. Ex: GPhone attr. Pitfall: Non-atomic violates. Interlink: Domain. Depth: Related values.
Degree/Cardinality
Steps: 1. Cols/rows count. Ex: 4/5 GUARDIAN. Pitfall: High cardinality slow queries. Interlink: Size. Depth: Dimensions.
Properties (3)
Steps: 1. Unique/distinct/atomic. Ex: No dup rows. Pitfall: Violate = invalid DB. Interlink: Keys. Depth: Relational rules.
Primary Key
Steps: 1. Choose candidate, 2. Unique ID. Ex: GUID. Pitfall: NULL in PK. Interlink: FK. Depth: No dups.
Foreign Key
Steps: 1. Ref PK, 2. Link tables. Ex: Roll FK. Pitfall: Orphaned records. Interlink: Integrity. Depth: Relationships.
Composite Key
Steps: 1. Combine attrs, 2. Unique set. Ex: Date+Roll. Pitfall: Partial match dups. Interlink: ATTENDANCE. Depth: Complex unique.
Redundancy
Steps: 1. Dup across files, 2. Waste. Ex: Guardian details. Pitfall: Update all. Interlink: Normalization. Depth: Inconsistency cause.
NULL
Steps: 1. Use for unknown, 2. Property 3. Ex: No address. Pitfall: Overuse confuses. Interlink: Constraints. Depth: Flexibility.
Referential Integrity (Advanced)
Steps: 1. FK must match PK, 2. Enforce via DBMS. Ex: Valid GUID. Pitfall: Cascade deletes. Interlink: FK. Depth: Valid links.
Normalization (Advanced)
Steps: 1. Split to reduce dup, 2. Forms (1NF-3NF). Ex: Split STUDENT. Pitfall: Over-normalize slow. Interlink: Design. Depth: Efficiency.
Advanced: ER models, ACID properties. Pitfalls: Keyless tables. Interlinks: To SQL Ch9. Real: Bank DB. Depth: 14 concepts details. Examples: Real tables. Graphs: Schema Fig 8.5. Errors: Wrong FK. Tips: Steps evidence; compare tables (file vs relation).
Table Examples & Schemas - From Text with Simple Explanations
Expanded with evidence, analysis; focus on schemas. Added variations for practice.
Example 1: STUDENT File (Table 8.1 - Redundancy)
Simple Explanation: Dup guardian (Shah).
Roll SName SDateofBirth GName GPhone GAddress 3 Taleem Shah 2002-02-28 Himanshu Shah 9818184855 26/77, West Patel Nagar, Ahmedabad 5 Ali Shah 2003-07-05 Himanshu Shah 9818184855 26/77, West Patel Nagar, Ahmedabad
Step 1: See dup GName/Phone.
Step 2: Causes inconsistency.
Step 3: Split to GUARDIAN.
Simple Way: Use FK.
Example 2: ATTENDANCE (Table 8.2 - Isolation)
Simple Explanation: No link to STUDENT.
Date Roll SName Status 2018-09-01 1 Atharv Ahuja P 2018-09-01 3 Taleem Shah A
Step 1: Dup SName.
Step 2: Separate programs.
Step 3: Use Roll FK, drop SName.
Simple Way: Relational link.
Example 3: STUDENT Schema (Table 8.4 - Post-DBMS)
Simple Explanation: With GUID FK.
Roll SName SDateofBirth GUID 1 Atharv Ahuja 2003-05-15 444444444444 3 Taleem Shah 2002-02-28 101010101010
Step 1: Unique Roll PK.
Step 2: GUID FK to GUARDIAN.
Step 3: No dup guardian.
Simple Way: Integrity.
Example 4: GUARDIAN (Table 8.5 - Unique)
Simple Explanation: Single source (Degree 4, Cardinality 5).
GUID GName GPhone GAddress 444444444444 Amit Ahuja 5711492685 G-35, Ashok Vihar, Delhi 101010101010 Himanshu Shah 9818184855 26/77, West Patel Nagar, Ahmedabad
Step 1: GUID PK.
Step 2: Atomic values.
Step 3: Distinct tuples.
Simple Way: No redundancy.
Example 5: ATTENDANCE Composite PK (Table 8.6)
Simple Explanation: {Date, Roll} unique (2025 scalable).
Date Roll Status 2018-09-01 1 P 2018-09-02 1 P
Step 1: No single unique.
Step 2: Combo PK.
Step 3: Roll FK to STUDENT.
Simple Way: Daily records.
Example 6: Keys Schema (Fig 8.5 - Links)
Simple Explanation: FK arrows.
Table PK FK STUDENT RollNumber GUID GUARDIAN GUID - ATTENDANCE {AttendanceDate, RollNumber} RollNumber
Step 1: Define PK/FK.
Step 2: Ensure matches.
Step 3: Query across.
Simple Way: Relations.
Tip: Draw schemas; troubleshoot (e.g., no PK dups). Added for keys, conversions.
Interactive Quiz - Master Database Concepts
2 MCQs in full sentences; 80%+ goal. Covers files, DBMS, relations, keys.
Start Quiz
Quick Revision Notes & Mnemonics
Concise, easy-to-learn summaries for all subtopics. Structured in tables for quick scan: Key points, examples, mnemonics. Covers files, DBMS, model, keys. Bold key terms; short phrases for fast reading.
Subtopic
Key Points
Examples
Mnemonics/Tips
File System Limits A-F : Access/Redund/Inconsist/Isol/Dep/Sharing.Dup data, no links. Table 8.1 dup Shah.
ARIDDS (Access Redundancy Inconsistency Dependence Sharing Isolation). Tip: "Files Are Redundant Disasters" – Switch to DBMS.
DBMS Create/Manage : Queries, abstract.Apps: Banking/Inventory. Cost: Hardware/training. MySQL, Fig 8.2 env.
CMAQ (Create Manage Abstract Query). Tip: "DBMS Manages Messy Files" – Central hub.
Key Concepts Schema : Design/constraints.Instance : Snapshot.Meta : Catalog.NOT NULL Roll.
SIM (Schema Instance Meta). Tip: "Schema Is Map, Instance Is Map Marked" – Structure vs data.
Relational Model Terms : Attr/Tuple/Domain/Deg/Card.Props 1-3 : Unique/Distinct/Atomic.Fig 8.4: Deg4 Card5.
ATDDC-UPDA (Attr Tuple Domain Deg Card Unique Props Distinct Atomic). Tip: "Relations Are Tuples of Attributes" – Table basics.
Keys Cand/Prim/Comp/FK : Unique/Chosen/Multi/Link.NULL in FK. GUID PK, Roll FK.
CPCF (Candidate Primary Composite Foreign). Tip: "Keys Connect Primary Candidates" – Link tables.
Redundancy/Inconsistency Redund : Dup waste.Inconsist : Mismatch.Split avoids. SName in two tables.
RI (Redundancy Inconsistency). Tip: "Redundant Inconsistency = Bad Design" – Normalize.
Overall Tip: Use ARIDDS-CMAQ-SIM-ATDDC-UPDA-CPCF-RI for full scan (5 mins). Flashcards: Front (term), Back (points + mnemonic). Print table for wall revision. Covers 100% chapter – easy for exams!
Key Terms & Processes - All Key
Expanded table 30+ rows; quick ref. Added advanced (e.g., Normalization, Integrity).
Term/Process Description Example Usage
File System Data containers STUDENT.txt Basic storage DBMS DB software MySQL Management Database Related data StudentAttendance Collection Schema Design blueprint Table structures Architecture Constraint Data limit UNIQUE Roll Integrity Meta-data Data about data Catalog Dictionary Instance Snapshot Populated tables State Query Info request Find presents Retrieval Relation Table GUARDIAN Storage Attribute Column GName Feature Tuple Row Ahuja record Entity Domain Values set Integers Roll Type Degree Attrs count 4 GUARDIAN Width Cardinality Tuples count 5 GUARDIAN Size Primary Key Unique ID GUID Distinction Foreign Key Ref PK Roll ATTEND Link Candidate Key Potential PK GPhone Alternative Composite Key Multi PK {Date,Roll} Combo Redundancy Dup data Dup guardian Waste Inconsistency Mismatch Name diff Error Isolation No links Separate files Hard integrate Dependence Struct change Update programs Rigid NULL Unknown No phone Flex Insertion Add data New student Manipulation Deletion Remove data Leave school Manipulation Update Modify data Change phone Manipulation Engine Core programs Query handler Backend Normalization Reduce dup Split tables Design Referential Integrity FK=PK Valid GUID Validity Alternate Key Unused candidate GPhone Backup Domain Value pool 10-digit phone Constraint Atomic Indivisible Single phone Property
Tip: Examples memory; sort subtopic. Easy: Table scan. Added 10 rows depth.
Database Processes Step-by-Step
Step-by-step breakdowns of core processes, structured as full questions followed by detailed answers with steps. Visual descriptions for easy understanding; focus on actionable Q&A with examples from chapter.
Question 1: How to convert file system to DBMS as in school example?
Answer:
Step 1: Identify dups (guardian in STUDENT).
Step 2: Split to GUARDIAN table with GUID PK.
Step 3: Add GUID FK to STUDENT.
Step 4: Drop SName from ATTENDANCE; use Roll FK.
Step 5: Define schemas/constraints.
Step 6: Populate (Tables 8.4-8.6).
Visual: Split arrow – STUDENT → STUDENT + GUARDIAN. Example: Shah one entry, linked.
Question 2: What steps define a relation like GUARDIAN (Fig 8.4)?
Answer:
Step 1: List attrs (GUID, GName, etc.).
Step 2: Define domains (string/int).
Step 3: Set PK (GUID UNIQUE).
Step 4: Add tuples (rows).
Step 5: Ensure properties (distinct, atomic).
Step 6: Degree=4, Cardinality=5.
Visual: Build blocks – Attrs → Tuples → Properties check. Example: Amit row added.
Question 3: How to establish FK relation (Fig 8.5)?
Answer:
Step 1: Choose PK in master (GUID GUARDIAN).
Step 2: Add same attr as FK in child (STUDENT).
Step 3: Ensure FK values match PK or NULL.
Step 4: Define constraint.
Step 5: Query joins via FK.
Step 6: Maintain integrity.
Visual: Arrow link – STUDENT GUID → GUARDIAN GUID. Example: Roll 1 links Ahuja.
Question 4: Process of data manipulation (insert example)?
Answer:
Step 1: New student joins.
Step 2: Insert to GUARDIAN (new GUID).
Step 3: Insert to STUDENT with GUID FK.
Step 4: Check constraints (unique Roll).
Step 5: Update instance.
Step 6: Query to verify.
Visual: Add row – GUARDIAN first → STUDENT link. Example: Rivaan insert.
Question 5: How does DBMS handle query (Fig 8.2)?
Answer:
Step 1: User queries (teacher attendance).
Step 2: DBMS processes via engine.
Step 3: Access catalog/schema.
Step 4: Retrieve from DB tables.
Step 5: Return results.
Step 6: Multiple users concurrent.
Visual: Flow arrows – Query → Engine → DB → Result. Example: Find presents via Roll.
Question 6: Steps to apply constraints in schema.
Answer:
Step 1: Create table.
Step 2: Add NOT NULL/UNIQUE.
Step 3: Ex: Roll UNIQUE NOT NULL.
Step 4: Insert checks auto.
Step 5: Violate → Error.
Step 6: Store in meta-data.
Visual: Lock icons on cols – UNIQUE lock. Example: Dup Roll reject.
Tip: Treat as FAQ; apply to tables. Easy: Q → Steps + Visual. Full Q&A for exam-like practice.
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Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each, common traps 35 of 140 board marks: SQL functions 20 board marks: networks and the web Common traps, corrected 12 board marks: Matplotlib plots Every statement with its exact output Page 1 free about 8 min read , Full kit about 55 min read ₹159
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Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each 40 marks: Unit V, rDNA and genomes 30 marks: Unit VI, culture and bioprocess 10 syllabus chapters: every vector, enzyme PCR, blots and DNA fingerprinting Every number tied to its book page Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each, common traps 15 marks in every 2025 set: share capital 9 marks in every 2025 set: debentures Common traps that cost marks, listed 6-mark cash flow in every paper 5 marks in every 2025 set: ratios Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each Elements of a poem and a story, Unit 1 Feature and article writing, Unit 2 Radio and TV script rules, with marks Steps and types of translation, Unit 3 Levels of editing, Unit 4 Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: most-asked concepts in 2 lines each 8 chapters ranked by what the board asked 31 marks: Organising, a 6-marker every set 30 marks in 4 papers: nature of management 14 principles of Fayol Case cues the board keeps using Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each 16 of 60 board marks: taal comparison 12 of 60 board marks: gharanas 13 thekas, from thah to chaugun 6 marks: history of the tabla, Unit 3 4 biographies, with dates Page 1 free about 8 min read , Full kit about 55 min read ₹159
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Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each 10 marks: National Income Accounting 3 methods for GDP, with identities M1–M4 and credit creation, Ch 3 Every deficit measure of the budget, Ch 5 6 chapters: every formula, board numerical Page 1 free about 8 min read , Full kit about 55 min read ₹159
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Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each, common traps 23 of 100 marks: Thinkers, Beliefs, Buildings 22 of 100 board marks: Harappa 20 of 100 marks: Kinship, Caste and Class 8-mark answer: Theme 2 in 3 of 4 papers 5 marks: the Part I map list Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each 24 of 100 board marks: Vijayanagara 24 of 100 marks: Mughal village, Theme 8 Q24 from Vijayanagara in every 2025 set 3 of 4 papers: source question on travellers 5 marks: the two map lists Page 1 free about 8 min read , Full kit about 55 min read ₹159
Read page 1 free Get the kit Get the kit One payment · instant PDF · ₹159 View details Marks booster + cheatsheet: key concepts in 2 lines each 1857 and National Movement map items Constituent Assembly committees table Gandhiji 1915–1931: Champaran to Salt March Permanent Settlement and the Fifth Report Bombay Deccan: ryotwari and the 1875 riots Page 1 free about 8 min read , Full kit about 55 min read ₹159
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This chapter is part of the CBSE Class 12 Board Examination Board Examination Explore every chapter — summary, notes, extra questions & MCQ quizzes Preparing for CBSE Class 12 Board Examination? Students also sit JEE is set on the Class 11 and 12 Physics, Chemistry and Maths syllabus; students prepare for boards and JEE together.
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The Last Lesson
Start here
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Economics (Class 12) Practice Quiz | CBSE Class 12 Board Examination
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Challenges of Nation Building
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Human Geography: Nature and Scope
#8
Bricks, Beads and Bones — The Harappan Civilisation
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Inverse Trigonometric Functions
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Journey to the End of the Earth
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The Challenges of Cultural Diversity
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Patterns of Social Inequality and Exclusion
#31
Social Institutions: Continuity and Change
#32
The Demographic Structure of the Indian Society
#33
Introducing Indian Society
#34
#35
Security in the Contemporary World
#36
International Trade (India)
#37
Transport and Communication (India)
#38
Tertiary and Quaternary Activities
#39
#40
Kings, Farmers and Towns — Early States and Economies (c. 600 BCE-600 CE)
#41
Theory of Consumer Behaviour
#42
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Nature and Significance of Management
#45
Dissolution of Partnership Firm
#46
Accounting for Partnership: Basic Concepts
#47
Three Dimensional Geometry
#48
Continuity and Differentiability
#49
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Principles of Inheritance and Variation
#52
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Accountancy (Class 12) Practice Quiz | CBSE Class 12 Board Examination
#58
Electrostatic Potential and Capacitance Fundamentals | CBSE Class 12 Board Examination
#59
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An Elementary School Classroom in a Slum
#61
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Social Influence and Group Processes
#63
Attitude and Social Cognition
#64
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Variations in Psychological Attributes
#68
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Mass Media and Communications
#70
Globalisation and Social Change
#71
Change and Development in Industrial Society
#72
Change and Development in Rural Society
#73
The Constitution and Social Change
#74
The Market as a Social Institution
#75
Recent Developments in Indian Politics
#76
The Crisis of Democratic Order
#77
Challenges to and Restoration of the Congress System
#78
India's External Relations
#79
Politics of Planned Development
#80
Era of One-party Dominance
#81
Environment and Natural Resources
#82
International Organisations
#83
#84
Contemporary Centres of Power
#85
Geographical Perspective on Selected Issues and Problems
#86
Planning and Sustainable Development in the Indian Context
#87
Mineral and Energy Resources
#88
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Land Resources and Agriculture
#90
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Population: Distribution, Density, Growth and Composition
#92
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The World Population: Distribution, Density and Growth
#95
Framing the Constitution — The Beginning of a New Era
#96
Mahatma Gandhi and the Nationalist Movement — Civil Disobedience and Beyond
#97
Rebels and the Raj — The Revolt of 1857 and its Representations
#98
Colonialism and the Countryside — Exploring Official Archives
#99
Peasants, Zamindars and the State — Agrarian Society and the Mughal Empire (c. sixteenth-seventeenth centuries)
#100
An Imperial Capital: Vijayanagara (c. fourteenth to sixteenth century)
#101
Bhakti-Sufi Traditions — Changes in Religious Beliefs and Devotional Texts (c. eighth to eighteenth century)
#102
Through the Eyes of Travellers — Perceptions of Society (c. tenth to seventeenth century)
#103
Thinkers, Beliefs and Buildings — Cultural Developments (c. 600 BCE-600 CE)
#104
Kinship, Caste and Class — Early Societies (c. 600 BCE-600 CE)
#105
Open Economy Macroeconomics
#106
Government Budget and the Economy
#107
Determination of Income and Employment
#108
National Income Accounting
#109
#110
The Theory of the Firm under Perfect Competition
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#121
#122
Analysis of Financial Statements
#123
Financial Statements of a Company
#124
Issue and Redemption of Debentures
#125
Accounting for Share Capital
#126
Reconstitution of a Partnership Firm – Retirement/Death of a Partner
#127
Reconstitution of a Partnership Firm – Admission of a Partner
#128
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#131
#132
#133
#134
Application of Derivatives
#135
Biodiversity and its Conservation
#136
#137
Organisms and Populations
#138
Biotechnology and its Applications
#139
Biotechnology: Principles and Processes
#140
Microbes in Human Welfare
#141
#142
#143
Molecular Basis of Inheritance
#144
Sexual Reproduction in Flowering Plants
#145
#146
#147
Aldehydes, Ketones and Carboxylic Acids
#148
Alcohols, Phenols and Ethers
#149
Haloalkanes and Haloarenes
#150
#151
The d- and f-Block Elements
#152
#153
Semiconductor Electronics: Materials, Devices and Simple Circuits
#154
#155
#156
Dual Nature of Radiation and Matter
#157
#158
Ray Optics and Optical Instruments
#159
#160
#161
Electromagnetic Induction
#162
#163
Moving Charges and Magnetism
#164
Electrostatic Potential and Capacitance
#165
Electric Charges and Fields
#166
CBSE Class 12 — Genetics and Evolution
#167
CBSE Class 12 — Matrices and Determinants
#168
CBSE Class 12 — Solutions and Colligative Properties
#169
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CBSE Class 12 — Electrostatics and Electric Field
#171
Humanities Subjects Practice Quiz | CBSE Class 12 Board Examination
More on CBSE Class 12 Board Examination19 guides Complete Summary and Solutions for Consumer Education and Protection – NCERT Human Ecology and Family Sciences, Chapter 12 – Study Summary, Explanation, Questions, Answers Complete Summary and Solutions for Supplementary Chemistry Material – NCERT Class XII Chemistry Part I Supplementary Resources – Additional Examples, Problems, and Explanations Complete Summary and Solutions for Project Based Learning – NCERT Class XII Computer Science, Chapter 13 – Project Planning, Implementation, Presentation, Documentation, and Evaluation Complete Summary and Solutions for Querying and SQL Functions – NCERT Class XII Informatics Practices, Chapter 1 – Explanation, Questions, Answers अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-16 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – तुलसीदास: (क) भरत-राम का प्रेम, (ख) पद अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-17 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – मलिक मुहम्मद जायसी: बारहमासा अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-15 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – विष्णु खरे: (क) सत्य, (ख) एक कम अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-11 अंतरा भाग 2 – कक्षा 12 हिंदी (ऐच्छिक) काव्य खंड – जयशंकर प्रसाद: (क) देवसेना का गीत, (ख) कार्नेलिया का गीत – संपूर्ण सारांश, व्याख्या, प्रश्न और उत्तर अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – विद्यापति: पद अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) पाठ्यपुस्तक story खंड – पाठ-12 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – सूर्यकांत त्रिपाठी ‘निराला’: (क) गीत गाने दो मुझे, (ख) सरोज-स्मृति अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-10 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – कुकुआन: दोह अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक story खंड – पाठ-14 अंतरा भाग 2 – कक्षा 12 के लिए हिंदी (ऐच्छिक) की पाठ्यपुस्तक काव्य खंड – केदारनाथ सिंह: (क) बनारस, (ख) दिशा Notebook backup + AI Save your notes. Revise with AI. Learn more → Share this article
