Call by Address

Duration: 2 min

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Module outline

  1. About Course: BTSC About Course
  2. Basics of Computer Science: Basics of COA, Number System, Number Representation
  3. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory
  4. Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms
  5. Database Management Systems(DBMS): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery
  6. Networking and Internet: Introduction to CN, Data Communication, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware Basics, Network Access Technologies, Network Security
  7. Cyber Security Basics: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Electronic Data Interchange and E-Commerce, Cyber Safety and Security
  8. C Programming (Programming Fundamentals): C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  9. C++, OOPs & Java (Programming Fundamentals): Java, OOPS with C++
  10. Python (Programming Fundamentals): Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules
  11. Web Development Basics: Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, JavaScript-Basics, HTML Basics
  12. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing
  13. Software and Hardware Tools: MS Office Applications, Unix OS, Linux OS
  14. Emerging Trends. AI & Social Ethics: Artificial Intelligence, Emerging Tech Trends, Society, Law & Ethics
  15. Full Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment introduces the 'Call by Address' mechanism in C programming, demonstrating how pointers enable functions to modify original variables. The instructor utilizes a `swap` function to illustrate pass-by-reference semantics, contrasting it implicitly with value passing. The core concept revolves around passing memory addresses using the address-of operator `&` and dereferencing them with `*` to access or alter data at specific locations.

Chapters

  1. 0:00 – 1:52 00:00-01:52

    The instructor explains 'Call by Address' using a `swap` function, initializing variables x=5 and y=10 at memory addresses 100 and 200. The code `void swap(int *a, int *b)` is shown alongside the main function call `swap(&x, &y)`. Visual diagrams depict arrows from parameters a and b pointing to x and y's addresses. The logic `temp = *a; *a = *b; *b = temp;` is traced step-by-step, showing how values are exchanged at the memory level. The final output confirms x=10 and y=5, proving that modifications inside the function persist in main due to direct address access.

The video effectively visualizes pointer mechanics by mapping abstract memory addresses to concrete variable values. By tracing the execution of `swap`, students observe that passing `&x` and `&y` allows the function to manipulate the original stack variables rather than copies. The use of temporary storage `int temp` is critical for preserving data during the exchange process.

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