Practise Questions (CSV File Handling) (Q11-20)

Duration: 4 min

This video lesson is available to enrolled students.

Return to /learn/RSSB-SENIOR-COMPUTER-INSTRUCTOR/paper-2-python/file-handling-data-analysis/csv-files/asset-practise-questions-csv-file-handling-q11-20 after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Mensuration and Geometry, Age Problems, Arithmetic, Statistics, Probability, Profit and Loss, Simple Interest and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, Powers and Exponents (Surds and Indices), Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy
  3. Paper-1 & 2 | Data Interpretation: Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Analogy, Ranking, Order and Sequence, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Arrangement, Logical Sequence Of Words, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: Selection Decision Table (Decision Making)
  7. Paper-1 | General Science: Physics, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: State Wise GK, GK- Current Affairs
  9. Paper-2 | Fundamentals of Computer: Basics of COA, Number System, Floating Point Rep, Number Representation
  10. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits
  11. Paper-2 | Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Linux OS, Distributed Systems
  12. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Relational Calculus, File Organization & Indexing, Transaction Management, Concurrency Control
  13. Paper-2 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  14. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  15. Paper 2 | Oops, C++, Java: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  16. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  17. Paper 2 | Emerging Trends and AI: Emerging Tech Trends, Artificial Intelligence
  18. Paper-2 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Advanced Algorithms
  19. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, 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, Ethical Hacking
  20. Paper-2 I Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  21. Paper-2 | Computer Organization and Architecture: Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations
  22. Paper-2 | Web Development: JavaScript-Basics, HTML Basics, CSS, XML
  23. Pedagogy: Child Development, Concept of Pedagogy, Psychology, Theories, Inclusive Education, Experiential Pedagogy, Curriculum Framework & Reforms, National Education Policy (NEP) 2020
  24. Live Sessions: RSSB Live Sessions
  25. RSSB Paper 1 - Full Mock Tests:
  26. RSSB Paper 2 - Full Mock Tests:
  27. SCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a lecture on Python file handling, specifically focusing on the CSV module. The instructor presents a series of multiple-choice questions to test and explain key concepts. The first part covers the `next()` function, which reads the next row from a CSV reader object, and the default delimiter for CSV files, which is a comma. The second part discusses file modes, explaining that the 'a' mode is used to append data to a file, and that the `close()` method is used to close a file. The lecture also covers the `with` statement as the best practice for safe file handling, and the `writerows()` function for writing multiple rows at once. The instructor uses a digital whiteboard to write code snippets and draw diagrams to illustrate the concepts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video begins with a question about the `next()` function in the Python CSV module. The code snippet shows `r = csv.reader(f)` and `print(next(r))`. The instructor explains that `next(r)` reads the next row from the CSV reader object. The question asks what `next(r)` does, with options including 'Reads next row'. The instructor confirms the correct answer is C. The next question asks how values are separated by default in a CSV file, with options for space, tab, comma, and semicolon. The instructor explains that the default delimiter is a comma, which is the correct answer (C).

  2. 2:00 – 4:11 02:00-04:11

    The lecture continues with question 14, which asks about the file mode used to append data to a CSV file. The options are 'w', 'r', 'a', and 'rb'. The instructor explains that 'a' stands for append, making C the correct answer. Question 15 shows code using `open("s.csv", "a", newline="")` and `writerow()`, asking where the data will be added. The instructor explains that appending adds data at the end, so the answer is C. Question 16 asks which statement closes a CSV file, with options `stop()`, `end()`, and `close()`. The instructor confirms `close()` is the correct method. Question 17 asks for the best way to handle CSV files safely, with options `open-close`, `try-except`, `with statement`, and `manual close`. The instructor explains that the `with` statement is the best practice. Question 18 shows code using `csv.reader()` and `list(r)`, asking for the output type. The instructor explains that `list(r)` returns a list of lists, so the answer is C. Question 19 asks which function writes multiple rows at once, with options `writerow()`, `writerows()`, `writelines()`, and `write()`. The instructor identifies `writerows()` as the correct function. Finally, question 20 shows `writerows([[1,2],[3,4]])` and asks how many rows are written. The instructor explains that two rows are written, making B the correct answer.

The video provides a comprehensive review of Python's CSV module through a series of exam-style questions. It systematically covers the core functions for reading and writing CSV files, including `next()`, `writerow()`, and `writerows()`. The lecture emphasizes best practices, such as using the `with` statement for safe file handling and the 'a' mode for appending data. The instructor uses a clear, step-by-step approach, explaining the logic behind each answer, which makes it an effective study resource for understanding fundamental file I/O operations in Python.

Loading lesson…