Practice question Proper prefixes

Duration: 2 min

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Inside: a video lesson and guided study material.

Module outline

  1. About Course: UPPSC Course Overview
  2. Interview Preparation & Guidance: Interview Preparation
  3. Paper 1 | General Hindi: भाषा, लिपि, ध्वनि, वर्ण, अक्षर, स्वर, व्यंजन, मात्रा और संयुक्ताक्षर, वर्तनी, वर्ण-विन्यास, अनुस्वार, अनुनासिक, चंद्रबिंदु और ‘र’ के रूप, शब्द, पद और शब्द-भेद, संज्ञा और सर्वनाम, विशेषण और क्रिया, लिंग, वचन, पुरुष और कारक, काल, वाच्य, वाक्य और वाक्य-भेद, वर्णमाला, समास, संधि, विलोम शब्द, पर्यायवाची शब्द, सामान्य अशुद्धियाँ, अनेक शब्दों के लिए एक शब्द, मुहावरे और लोकोक्तियाँ, अपठित गद्यांश और अपठित पद्यांश, Multi-Topic Content (Cross-Concept Material), शब्द-भंडार, वर्ण-विचार, हिन्दी की ध्वनि और स्वनिम व्यवस्था, प्राचीन और मध्यकालीन भारतीय आर्यभाषाएँ, काव्य के लक्षण, हेतु और प्रयोजन, अशुद्धि-शोधन, शब्द-रचना, शब्द-भेद, हिन्दी की रूप रचना, रूप-रचना, हिन्दी शब्द रचना, हिन्दी साहित्येतिहास दर्शन, भक्तिकालीन काव्यधाराएँ, भारतीय काव्यशास्त्र की परंपरा, भारतीय नवजागरण और स्वाधीनता आंदोलन, अन्य गद्य विधाएँ एवं प्रवासी साहित्य, निर्धारित उपन्यासों का तुलनात्मक अध्ययन, गोदान, हिन्दी कहानी का विकास, स्वातंत्र्योत्तर और नयी कहानी, हिन्दी निबंध का विकास, शुक्लोत्तर निबंध, द्विवेदी और शुक्ल युग के निबंध, हिन्दी की संवैधानिक स्थिति, आधुनिक भारतीय आर्यभाषाएँ और हिन्दी का उद्भव, हिन्दी भाषा प्रयोग के विविध रूप, रीतिकाल, जीवनी, द्विवेदी युग और छायावाद, रीति, वक्रोक्ति और औचित्य सिद्धान्त, शब्दशक्ति और ध्वनि सिद्धान्त, रस सिद्धान्त और साधारणीकरण, उत्तर आधुनिकतावाद, लोहिया दर्शन, हिन्दी उपन्यास का विकास, हिन्दी नवजागरण, अंबेडकर दर्शन, आदिकाल, प्रयोगवाद और नयी कविता, छायावादी काव्य: प्रसाद और निराला, प्रगतिवाद से समकालीन कविता, निर्गुण भक्ति काव्य, द्विवेदीयुगीन काव्य, रीतिकालीन काव्य, आरंभिक हिन्दी उपन्यास, स्वातंत्र्योत्तर उपन्यास, आत्मकथा, स्वाधीनता-पूर्व प्रेमचंदोत्तर उपन्यास, निर्धारित कहानियों का तुलनात्मक अध्ययन, साठोत्तरी नाटक, प्रसाद और प्रसादोत्तर युग के नाटक, भारतेन्दु युगीन नाटक, स्वातंत्र्योत्तर नाटक, भारतेन्दु युगीन निबंध, संस्मरण और रेखाचित्र, व्यंग्य, एक साहित्यिक की डायरी, संस्कृति के चार अध्याय, सगुण भक्ति काव्य, हिन्दी नाटक, एकांकी और रंगमंच, आधुनिक गद्य और हिन्दी नवजागरण, अलंकार सिद्धान्त, हिन्दी आलोचना का विकास, भक्ति आंदोलन, कल्पना, बिम्ब, प्रतीक, मिथक और फंतासी, नयी कविता का विस्तार और साठोत्तरी कविता, उत्तर-छायावादी और प्रगतिवादी काव्य, काव्यगुण और काव्यदोष, प्लेटो, अरस्तू और पाश्चात्य परंपरा, मार्क्सवाद, स्वच्छन्दतावादी काव्यशास्त्र, आधुनिक पाश्चात्य आलोचना, भाषा और भाषा परिवार, देवनागरी लिपि
  4. Paper 2 | General Studies: State Wise GK, Polity, Geography, History, GK- Current Affairs
  5. Paper 1 | Programming Language: Language Design, C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++
  6. Paper 1 | Database Management Systems: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, ORDBMS, NoSQL
  7. Paper 1 | Cyber Security: Society, Law & Ethics, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking
  8. Paper 1 | Computer Organization and Architecture: Basics of COA, Programming the Basic Computer, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design
  9. Paper 1 | Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  10. Paper 1 | Design and Analysis of Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  11. Paper 1 | Data Structures: Introduction to DS, Array, Linked List, Stack, Queue, Tree, Graphs, Hashing
  12. Paper 1 | Discrete Structures and Theory of Logic: Permutation and Combination, Set Theory, Relations, Functions, Propositional and Predicate Logic, Graph Theory, Group Theory
  13. Paper 1 | Software Project Management: Software Project Management
  14. Paper 2 | Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS, Linux OS, Security
  15. Paper 2 | Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment, Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Pushdown Automata & CFG, Complexity Theory
  16. Paper 2 | Artificial Intelligence & High Performance Computing: Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Natural Language Processing, Emerging Tech Trends
  17. Paper 2 | Image Processing: Digital Image Fundamentals, Image Enhancement, Image Restoration, Color Image Processing, Image Compression
  18. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  19. Paper 2 | Computer Graphics: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing
  20. Paper 2 | Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, HTML Basics, JavaScript-Basics, Java
  21. Paper 2 | Soft Computing: Fuzzy Sets, Artificial Neural Networks, Genetic Algorithms
  22. Paper 2 | Distributed System: Distributed Systems
  23. UPPSC Live Class Recordings: UPPSC Polytechnic Lecturer 2025 (CS)
  24. Previous Year Papers:
  25. Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video features a lecture on string theory, specifically addressing a multiple-choice question: 'In a string of length n, how many proper prefixes can be generated'. The options displayed are a) 2^n, b) n, c) n(n+1)/2, and d) n-1. The instructor, wearing a green shirt with 'INV CIBLE' text, sits in a black gaming chair and uses a digital pen to write on a whiteboard. He starts by writing the example string 'gate' to illustrate the concept. He lists the prefixes of 'gate' as phi (empty string), 'g', 'ga', 'gat', and 'gate'. He distinguishes between 'prefix' and 'proper prefix' by writing these terms on the right side of the board. He explains that a proper prefix excludes the string itself, so he crosses out 'gate'. He also writes 'abc' in red on the left, possibly as another example or note. He counts the remaining proper prefixes. In one instance, he writes 'phi, g, ga, gat, gate' and crosses out 'gate'. He then seems to exclude the empty string phi as well, focusing on non-empty proper prefixes. He counts 'g', 'ga', and 'gat', writing the number 3 in a red circle. Since the length of 'gate' is 4, and the count is 3, he identifies the pattern as n-1. He circles option (d) n-1 in red and writes 'n-1' next to it. He also writes 'n' in a red circle near the word 'gate'. The watermark 'KNOWLEDGEGATE' is visible in the background. The lecture concludes with the selection of option (d) based on the example provided. The instructor uses arrows to connect the string 'gate' to the list of prefixes, visually demonstrating the derivation. He emphasizes the term 'proper prefixes' by underlining it in the question text. The final conclusion is reinforced by circling the correct option and the corresponding numerical value derived from the example. The instructor's gestures and board work guide the viewer through the logical steps of identifying prefixes, filtering for proper ones, and counting them to find the general formula. The visual cues, such as the red circles and underlines, highlight the critical parts of the problem and the solution. The progression from the specific example 'gate' to the general formula n-1 is clearly demonstrated through this step-by-step breakdown. The instructor's focused expression and hand movements indicate a clear pedagogical approach to explaining the concept. The video serves as a tutorial for students preparing for exams like GATE, as indicated by the watermark and the style of the question.

Chapters

  1. 0:00 – 1:38 00:00-01:38

    The video features a lecture on string theory, specifically addressing a multiple-choice question: 'In a string of length n, how many proper prefixes can be generated'. The options displayed are a) 2^n, b) n, c) n(n+1)/2, and d) n-1. The instructor, wearing a green shirt with 'INV CIBLE' text, sits in a black gaming chair and uses a digital pen to write on a whiteboard. He starts by writing the example string 'gate' to illustrate the concept. He lists the prefixes of 'gate' as phi (empty string), 'g', 'ga', 'gat', and 'gate'. He distinguishes between 'prefix' and 'proper prefix' by writing these terms on the right side of the board. He explains that a proper prefix excludes the string itself, so he crosses out 'gate'. He also writes 'abc' in red on the left, possibly as another example or note. He counts the remaining proper prefixes. In one instance, he writes 'phi, g, ga, gat, gate' and crosses out 'gate'. He then seems to exclude the empty string phi as well, focusing on non-empty proper prefixes. He counts 'g', 'ga', and 'gat', writing the number 3 in a red circle. Since the length of 'gate' is 4, and the count is 3, he identifies the pattern as n-1. He circles option (d) n-1 in red and writes 'n-1' next to it. He also writes 'n' in a red circle near the word 'gate'. The watermark 'KNOWLEDGEGATE' is visible in the background. The lecture concludes with the selection of option (d) based on the example provided. The instructor uses arrows to connect the string 'gate' to the list of prefixes, visually demonstrating the derivation. He emphasizes the term 'proper prefixes' by underlining it in the question text. The final conclusion is reinforced by circling the correct option and the corresponding numerical value derived from the example. The instructor's gestures and board work guide the viewer through the logical steps of identifying prefixes, filtering for proper ones, and counting them to find the general formula. The visual cues, such as the red circles and underlines, highlight the critical parts of the problem and the solution. The progression from the specific example 'gate' to the general formula n-1 is clearly demonstrated through this step-by-step breakdown. The instructor's focused expression and hand movements indicate a clear pedagogical approach to explaining the concept. The video serves as a tutorial for students preparing for exams like GATE, as indicated by the watermark and the style of the question.

The lecture effectively demonstrates the concept of proper prefixes using a concrete example. By breaking down the string 'gate' and systematically listing its prefixes, the instructor clarifies the definition of a proper prefix. The visual aids, including underlining and circling, help reinforce the distinction between total prefixes and proper prefixes. The derivation of the formula n-1 is clearly shown through the example, providing a practical understanding of the theoretical concept.

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