POINTERS DECLARATION

Duration: 4 min

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Module outline

  1. Numerical Ability & Problem Solving: Speed Mathematics and Basic Mathematics, Arithmetic, Number System, HCF LCM, Divisibility Rules, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Time and Work, Pipe and Cistern, Speed Time and Distance, Age Problems, Partnership, Data Interpretation, Mental Ability, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Logarithm, Mensuration and Geometry, Permutation and Combination, Probability, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Sentence Structure and Correction, Data Sufficiency, Trigonometry, Measurement and Quantity Take-Off, Signal Space and Optimum Detection, Probability, Statistics, Algebra, Time and Work, Speed, Time and Distance, Data Interpretation, Combinatorics
  2. Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Logical Sequence Of Words, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Selection Decision Table (Decision Making), Alphabet and Word Tests, Numerical Reasoning, Number System, Averages, Mixtures and Alligation, Percentages, Series Completion, Analogy and Classification, Patterns in Two-Dimensional Figures, Coding and Decoding, Mathematical Operations, Direction Sense, Logical Deduction and Induction, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Traverse Surveying, Ratio and Proportion, Mensuration, Permutations and Combinations, Clocks and Calendars, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations
  3. General Knowledge & Current Affairs (India + Rajasthan): History, Geography, Polity, Indian Economy, Static General Knowledge, State Wise GK, GK- Current Affairs, Environment, Physics
  4. Computer Fundamentals & Operating Systems: Basics of COA, Floating Point Rep, Digital Systems & Boolean Basics, Number Representation, Number System, Introduction to OS, File Management, Windows OS, Unix OS, Linux OS, Register Transfer and Microoperations, Virtual Memory
  5. Computer Networks: Introduction to CN, Data Communication, DLL: Error Control, DLL: Access Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Application Layer, Hardware Basics, Network Security
  6. Cyber Security: 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
  7. Programming (C & OOP): C Fundamentals, Control Flow, Arrays & Pointers, Functions, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Operators & Expressions, Sorting Algorithms, Java Fundamentals, Java
  8. MS Office & Data Processing: MS Office Applications, Basics of DBMS
  9. Internet & Web Technology: Society, Law & Ethics, Terms & Abbreviations, Keyboard Shortcuts, Emerging Tech Trends, Artificial Intelligence, Emerging Technologies, Internet Fundamentals, Website, Browser & Services, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture provides a detailed explanation of C pointer declarations and the advanced concept of pointers to pointers. It starts by defining pointers as variables capable of holding memory addresses, emphasizing that since addresses are whole numbers, pointers always contain whole numbers. The instructor clarifies common misconceptions, such as `float *s` storing an address of a float rather than a float value itself. The lesson then extends this concept to show that a variable can be a pointer to another pointer. Using the code `int i = 3, *j, **k;`, the instructor demonstrates how `j` holds the address of `i` and `k` holds the address of `j`. He begins analyzing the code's output, marking specific `printf` statements to distinguish between printing addresses and values.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces pointer declarations like `int *alpha`, `char *ch`, and `float *s`, explaining they hold addresses. He notes that addresses are always whole numbers. He then introduces a code snippet `int i = 3, *j, **k;` to demonstrate pointers to pointers. He explains the initialization `j = &i` and `k = &j`. He starts annotating the `printf` statements on the screen, marking the first few with an 'x' to indicate they print addresses. He writes on the board that `i` holds 3, `j` holds an address (e.g., 65524), and `k` holds an address (e.g., 65522).

  2. 2:00 – 3:38 02:00-03:38

    The instructor displays the program output and draws a memory diagram. The diagram shows `i` containing 3 at address 65524, `j` containing 65524 at address 65522, and `k` containing 65522 at address 65520. He explains the chain of pointers: `k` points to `j`, which points to `i`. He goes through the remaining `printf` statements, marking them with 'y' to show they print values. He explains that `*j` and `**k` both dereference to the value 3. The segment concludes with a slide titled 'Back to Function Calls', indicating a shift in topic.

The lesson progresses from fundamental pointer definitions to the more complex concept of pointers to pointers. By using a concrete code example with `i`, `j`, and `k`, the instructor visually demonstrates memory allocation and dereferencing. The transition from explaining declarations to analyzing specific `printf` outputs and memory diagrams solidifies the understanding of how pointers chain together to access values indirectly. This sets the stage for understanding function calls by reference.

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