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

Duration: 6 min

This video lesson is available to enrolled students.

Return to /learn/DSSSB-TGT-COMPUTER-SCIENCE-COMPLETE-COURSE/python-language/file-handling-data-analysis/binary-files/asset-practise-questions-binary-file-handling-q11-20 after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Section A: General Awareness: Polity, Physics, Biology, Chemistry, Static General Knowledge, History, Geography, Indian Economy, GK- Current Affairs, Evolution of Indian Banking (Banking & Financial Awareness), Environment
  3. Section A: General Intelligence & Reasoning ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Blood Relations, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Directions (Direction Test), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Selection Decision Table (Decision Making), Logical Sequence Of Words, Crypt Arithmetic, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, TCS NQT Advanced Reasoning Ability
  4. Section A: Arithmetical & Numerical Ability: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Mensuration and Geometry, Powers and Exponents (Surds and Indices), Algebra, Probability, Mental Ability, Age Problems, Partnership, Statistics, Arithmetic, Speed Mathematics and Basic Mathematics, Miscellaneous
  5. Section A: English Language & Comprehension: Vocabulary, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Articles, Sentence Construction, Preposition, Direct and Indirect Speech, Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Modals, Active Passive Voice (Voice), Sentence Correction (Error Correction), Adverb, Conjunction, Cloze Test (Cloze Passage)
  6. Section A: Hindi Language & Comprehension: 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
  7. Section B: Programming, Data Structures, OOP & Java: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Java, OOPS with C++, Language Design, Intro to Compilers, Visual Basics, Syntax Analysis: Bottom-Up, Object Oriented Technology
  8. Section B: Computer Networks, TCP/IP & Network Security: Introduction to CN, Data Communication, DLL: Flow Control, DLL: Access 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, Network Access Technologies, Network Security, Society, Law & Ethics, Mobile Computing, Net Layer:Routing Protocol, Cyber Safety and Security
  9. Section B: Teaching Methodology: Child Development, Concept of Pedagogy, Theories, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Curriculum Framework & Reforms, National Education Policy (NEP) 2020, Psychology, Teaching-Learning Process, Personality Development, Teaching Methods & Strategies, Learning and Motivation, Learners & Learning Process, Factors Affecting Teaching, Methods of Teaching, Nature, Objectives & Characteristics of Teaching, Teaching-Learning Aids & ICT Integration, Classroom Management & Communication, Evaluation, Assessment & Measurement, Curriculum & School Environment, Inclusive Education & Special Needs, Professional Development & Ethics
  10. Section B: Digital Electronics / Boolean Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Analog-Digital Conversion
  11. Section B: Operating Systems & Linux: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, File Management, Disc Scheduling, Unix OS, Linux OS, Distributed Systems, Windows OS
  12. Section B: Data Base Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, File Organization & Indexing, Transaction Management, Concurrency Control, Database Security & Authorization, Database Recovery, Data Warehousing & Mining
  13. Section B: Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, HTML Basics, CSS, Emerging Technologies, JavaScript-Basics, .Net Programming, Electronic Data Interchange and E-Commerce, XML
  14. Section B: Computer Fundamentals, IT Basics & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer, Terms & Abbreviations, MS Office Applications, Instr Formats & Modes, Floating Point Rep
  15. Section B: Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  16. Section B: Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, extras, Fundamentals of Systems and Information Systems
  17. Section B: Design & Analysis of Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  18. Section B: Mathematics: Linear Algebra, Calculus, Trigonometry, Vectors, Set Theory, Functions, Relations, Propositional and Predicate Logic, Research Process Steps, Graph Theory
  19. Section B: Computer Graphics, Multimedia & Mobile Computing: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing, Multimedia
  20. Section B: Emerging Trends: Emerging Tech Trends, Knowledge Representation, Natural Language Processing
  21. DSSSB Previous Year Paper:
  22. Business Studies and Management: Business Communication, Business Organization and Management, Financial Accounting, Business Economics, Management Information System (MIS), Knowledge Management & New Economy
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a lecture on Python file handling, focusing on the pickle module for serializing and deserializing Python objects. The instructor presents a series of multiple-choice questions to test understanding. The first question asks about the required file mode for pickle, with the correct answer being binary mode, as demonstrated by the code snippet `f = open("emp.dat","wb")`. The second question asks about the data type stored, which is a list object, as shown in the code `pickle.dump(["A", 25], f)`. The third question asks about the mode to append binary data, with the correct answer being 'ab'. The fourth question asks which operation is not directly possible in a binary file, with the correct answer being 'Search'. The fifth question asks how many objects are stored in a file, with the code showing two `pickle.dump` calls, so the answer is 2. The sixth question asks about the output of loading objects, where the code `print(pickle.load(f))` is called twice, and the output is 100 200. The seventh question asks about the exception raised when `load()` reaches EOF, which is `EOFError`. The final question asks about the purpose of a code snippet that uses a `while True` loop with `pickle.load(f)`, which is to read all objects from the file. The instructor uses a digital whiteboard to write and explain the code and concepts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video begins with a question about the file mode required for the pickle module. The on-screen text shows question 11: "Which of the following must be used with pickle?" with options A. Text mode, B. Binary mode, C. Append mode only, D. Read mode only. The instructor explains that the correct answer is B, Binary mode, as the pickle module requires binary mode to serialize objects. The instructor then moves to question 12, which asks about the stored data type. The code snippet shows `import pickle` and `f = open("emp.dat","wb")`, followed by `pickle.dump(["A", 25], f)`. The question asks for the stored data type, with options A. String, B. List object, C. Dictionary, D. Integer. The instructor explains that the data type is a list object, as the list `['A', 25]` is being dumped.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues with question 13, which asks about the mode used to append binary data. The options are A. wb, B. rb, C. ab, D. rb+. The instructor explains that the correct answer is C, 'ab', which stands for append binary. The instructor then moves to question 14, which asks where data will be written when using the 'ab' mode. The code shows `f = open("x.dat","ab")` and `f.write(b"10")`. The options are A. Beginning, B. Middle, C. End, D. Random. The instructor explains that data is written at the end of the file. Next, question 15 asks which operation is not directly possible in a binary file. The options are A. Read, B. Write, C. Search, D. Print content. The instructor explains that 'Search' is not a direct operation. Question 16 asks how many objects are stored, with the code showing two `pickle.dump` calls. The instructor explains that two objects are stored. Question 17 asks about the output of loading objects, with the code showing two `print(pickle.load(f))` calls. The instructor explains that the output will be 100 200. Question 18 asks about the exception when `load()` reaches EOF, with the correct answer being EOFError.

  3. 5:00 – 5:39 05:00-05:39

    The instructor presents question 19, which asks about the purpose of a code snippet that uses a `while True` loop with `pickle.load(f)`. The code is `import pickle; f = open("t.dat","rb"); try: while True: print(pickle.load(f)) except: pass`. The options are A. Append data, B. Delete file, C. Read all objects, D. Update record. The instructor explains that the purpose is to read all objects from the file. The final question, 20, asks how searching in a binary file is done. The options are A. Indexing, B. Using grep, C. Sequential read and comparison, D. Direct access. The instructor explains that searching is done by sequential read and comparison. The video ends with a brief, unrelated screen showing a "No Signal" error message.

The video provides a comprehensive review of Python's pickle module and binary file handling through a series of multiple-choice questions. The core concept is that the pickle module requires binary mode for both writing and reading, as demonstrated by the `wb` and `rb` modes. The lecture emphasizes that the `dump` function serializes objects into a binary file, and the `load` function deserializes them back into Python objects. The instructor uses code examples to illustrate key points, such as the data type being stored (a list object) and the number of objects stored (two). The lesson also covers the practical aspects of file operations, including the correct mode for appending data ('ab') and the fact that searching in a binary file is not a direct operation but requires a sequential read and comparison. The final question reinforces the concept of reading all objects from a file using a loop, which is a common pattern in file processing.

Loading lesson…