Converting time in 24 hour format from 12 hour format

Duration: 6 min

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Inside: a video lesson and guided study material.

Module outline

  1. Quantitative Ability: Percentage, Profit and Loss, Ratio and Proportion (Ratios), Average, Time and Work, Speed Time and Distance, Simple Interest and Compound Interest, Age Problems, Number System, Divisibility Rules, HCF LCM, Algebra, Permutation and Combination, Probability, Data Interpretation, Logarithm, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Speed Mathematics and Basic Mathematics
  2. Logical Reasoning: Seating Arrangements, Puzzle Solving (Puzzles), Data Arrangement, Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Data Sufficiency, Venn Diagram, Inequality, Series (Number and Letter Series) (Numerical Relations and Reasoning), Logical Sequence Of Words, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning)
  3. Verbal Ability: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Subject Verb Agreement (Verb Noun Agreement), Tenses, Articles, Preposition, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Vocabulary, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Completion (Fill in the blanks), Sentence Correction (Error Correction), Cloze Test (Cloze Passage), Facts, Inference and Judgements
  4. Programming Fundamentals (Technical): C Fundamentals
  5. Data Structures (Technical): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  6. Algorithms (Technical): Algorithm Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Time Complexity Analysis, Advanced Algorithms
  7. OOPs (Technical): Object Oriented Programming (OOPS)
  8. DBMS (Technical): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, ORDBMS, Database Security & Authorization, Query Processing & Optimization, Enhanced Data Models, Data Warehousing & Mining, Big Data Systems, NoSQL
  9. SQL (Technical): SQL
  10. Operating Systems (Technical): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  11. Computer Networks (Technical): 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, Cloud Computing and IoT, Cyber and Info Security
  12. Software Engineering (Technical): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  13. Coding/Automata Round: Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir, Pseudo Codes
  14. Personality / Behavioral Assessment: Behavioral Assessment (Behavioral Competency Profiling) (Psychometric Test)
  15. Writing Assessment: English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a coding tutorial that teaches how to convert a time from a 12-hour AM/PM format to a 24-hour format using the C programming language. The instructor begins by presenting the problem statement, which includes input and output specifications and sample test cases. He then outlines the logical steps required: parsing the input time, validating the hours, minutes, and seconds, and checking the AM/PM indicator. The core logic involves adding 12 to the hour if it is PM and not 12, and setting the hour to 0 if it is 12 PM. The instructor then writes the C code, demonstrating the use of scanf to read the time components and a string, and if-else statements to implement the conversion logic. The final code is shown in an online compiler, where the instructor runs a test case to verify the output. The video is part of a series from 'Knowledge Gate' aimed at placement preparation.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video starts with the 'Knowledge Gate' logo, followed by a slide that introduces the topic: converting a time from 12-hour AM/PM format to 24-hour format. The instructor, Yash Jain, presents the problem, stating the input format as 'hh:mm:ss AM/PM' and the output format as 'hh:mm:ss'. He provides sample test cases, such as '08:00:00 PM' converting to '20:00:00:00' and '12:00:00 AM' converting to '00:00:00'. The slide also includes a note that the instructor is a 'Placement Expert' who has been placed in 9 IT companies.

  2. 2:00 – 5:00 02:00-05:00

    The instructor transitions to the logic of the problem, writing on a virtual blackboard. He explains that the first step is to take the input, which can be done using scanf with the format specifier '%d:%d:%d%s' to get the hours, minutes, seconds, and the AM/PM string. He then outlines the logic: check if the string 'a' is 'AM' or 'PM'. If it's PM and the hour is not 12, add 12 to the hour. If it's 12 PM, set the hour to 0. He also notes that the hour must be between 1 and 12, and minutes and seconds must be between 0 and 59. He then begins to write the C code, starting with the necessary header files and the main function.

  3. 5:00 – 6:24 05:00-06:24

    The instructor completes the C code on the screen. He writes the scanf statement to read the time components and the AM/PM string. He then implements the conversion logic using if-else statements. The code checks if the hour is between 1 and 12, and if the minutes and seconds are between 0 and 59. It then checks if the string is 'PM' and the hour is not 12, in which case it adds 12 to the hour. If the string is 'AM' and the hour is 12, it sets the hour to 0. The code then prints the converted time in 24-hour format. The instructor then switches to an online C compiler, runs the code, and inputs '08:00:00 PM', which correctly outputs '20:00:00'.

The video provides a comprehensive, step-by-step guide to solving a common programming problem. It begins with a clear problem definition, followed by a logical breakdown of the solution. The instructor then translates this logic into a complete, functional C program, demonstrating the use of standard input/output functions and conditional statements. The final demonstration in the online compiler confirms the correctness of the solution, making it a practical and effective learning resource for students preparing for coding interviews.

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