Practise Questions (File Handling and Paths) (Q1-10)

Duration: 4 min

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Module outline

  1. About the Course: About the Course
  2. Section 1 | Language (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, संधि, समास, 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), वर्णमाला
  3. Section 1 | Language (उर्दू भाषा — 22 प्रश्न (निश्चित)): Spelling & Diacritics, Grammar (اسم, فعل, صفت, ضمیر), Vocabulary, Idioms & Proverbs, Comprehension
  4. Section 1 | Language (বাংলা / बांग्ला भाषा — 22 प्रश्न (निश्चित)): Bangla Script and Sounds, Bangla Grammar and Usage, Bangla Word Formation and Vocabulary, Reading and Text Interpretation
  5. Section 1 | Language (English): Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Pronoun, Verb, Adverb, Preposition, Articles, Determiner, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Construction, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Verbal Analogy (Word Based Analogy), Facts, Inference and Judgements
  6. Section 2 | Primary Maths & Reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Mensuration and Geometry, Age Problems, Arithmetic, Powers and Exponents (Surds and Indices), Algebra, Probability, Trigonometry, Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence
  7. Section 2 | General Awareness (GK + Current Affairs): Polity, Physics, Biology, State Wise GK, Chemistry, History, Geography, Indian Economy, Environment, GK- Current Affairs, Static General Knowledge
  8. Section 3 | Computer System and Org. (CSO): Basics of COA, Floating Point Rep, Cache Memory Organization, Instr Formats & Modes, Programming the Basic Computer, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design
  9. Section 3 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control
  10. Section 3 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Process Synchronization
  11. Section 3 | Computer Networks: 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, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics
  12. Section 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Shortest Path Algos
  13. Section 3 | Theory Of Computation & Compiler Design: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization
  14. Section 3 | Emerging Trends (AI, Societal Ethics & MS Office): Artificial Intelligence, Emerging Tech Trends, Society, Law & Ethics, MS Office Applications
  15. Section 3 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Maintenance and Configuration Management, Software Testing
  16. Section 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Section 3 | OOPS, C++, JAVA, HTML: OOPS with C++, Java, HTML Basics, CSS
  18. Section 3 | Java: Java Fundamentals, Array, String, IO & References
  19. Section 3 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  20. Section 3 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  21. Section 3 | Multimedia: Multimedia
  22. BPSC Previous Year Papers:
  23. BPSC Full Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a lecture on Python file handling, presented as a series of practice questions. The instructor begins by explaining the difference between absolute and relative file paths, using the example of "/home/user/file.txt" as an absolute path. The lesson then progresses to file opening modes, defining 'r' for reading, 'w' for writing (which creates or overwrites), 'a' for appending, and 'r+' for reading and writing. The instructor demonstrates that opening a file in 'r' mode will result in an error if the file does not exist. The final part of the video covers the 'close()' function for closing a file and the advantage of using the 'with' statement, which automatically closes the file, preventing errors from forgotten close calls. The presentation is structured as a multiple-choice quiz, with the instructor writing on a digital screen to highlight the correct answers.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video starts with a slide titled "Practice Questions - File Handling & Paths". The first question asks, "Which of the following is an absolute path?" with options A. data/file.txt, B. ../file.txt, C. /home/user/file.txt, and D. file.txt. The instructor explains that an absolute path starts from the root directory, which is indicated by a forward slash at the beginning. He points to option C, "/home/user/file.txt", as the correct answer, stating it is an absolute path because it begins with "/". The second question asks, "Which path depends on the current working directory?" with options A. Absolute path, B. Relative path, C. Root path, and D. Network path. The instructor explains that a relative path is dependent on the current working directory and points to option B as the correct answer.

  2. 2:00 – 4:24 02:00-04:24

    The instructor moves to the next question, number 3: "Which mode opens a file for reading and writing without deleting content?" The options are A. w+, B. r+, C. a+, and D. r. The instructor explains that the 'r+' mode allows for both reading and writing without deleting the existing content, and he circles option B as the correct answer. Question 4 asks, "What happens if a file does not exist and is opened in r mode?" The options are A. File is created, B. File is opened, C. Error occurs, and D. Data is appended. The instructor explains that since 'r' mode is for reading only, if the file doesn't exist, an error will occur, so C is the correct answer. Question 5 asks, "Which mode creates a new file or overwrites existing file?" The options are A. r, B. a, C. w+, and D. r+. The instructor explains that the 'w' mode (or 'w+') creates a new file or overwrites an existing one, and he circles option C. Question 6 presents a code snippet: f = open("test.txt", "w"); f.write("Python"); f.close(). The question is, "What happens to previous content?" The options are A. Appended, B. Deleted, C. Modified. The instructor explains that the 'w' mode overwrites the file, so the previous content is deleted, making B the correct answer. Question 7 asks, "Which mode appends data at the end of file?" The options are A. w, B. r+, C. a, and D. w+. The instructor explains that the 'a' mode appends data, so C is correct. Question 8 shows code: f = open("a.txt", "a"); f.write("Hello"). The question is, "Where will 'Hello' be written?" The options are A. Beginning, B. Middle, C. End, D. Random position. The instructor explains that 'a' mode appends to the end, so C is correct. Question 9 asks, "Which function closes a file?" The options are A. end(), B. stop(), C. close(), D. exit(). The instructor circles 'close()' as the correct function. Question 10 asks, "Advantage of using with statement is:" The options are A. Faster execution, B. File closes automatically, C. File opens twice, D. Prevents overwrite. The instructor explains that the 'with' statement automatically closes the file, so B is the correct answer.

The video provides a comprehensive, question-based review of Python file handling. It systematically covers the fundamental concepts of file paths, starting with the distinction between absolute and relative paths. The core of the lesson focuses on file opening modes, clearly explaining the behavior of 'r', 'w', 'a', and 'r+' modes, including their effects on file content and error handling. The instructor uses a digital whiteboard to visually reinforce the correct answers. The lesson concludes by highlighting the importance of the 'close()' function and the significant advantage of the 'with' statement for automatic file closure, which is a best practice in Python programming.

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