Units of Memory

Duration: 7 min

This video lesson is available to enrolled students.

Return to /learn/SSC-JE-IMD-SCIENTIFIC-ASSISTANT-COMPUTER-SCIENCE/computer-organisation-architecture/basics-of-coa/basics-of-memory/asset-units-of-memory after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. General Intelligence & Reasoning: Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Logical Sequence Of Words, Syllogisms, Venn Diagram, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Data Sufficiency, Puzzle Solving (Puzzles), Data Arrangement, Cubes & Dices, Calendar, Clock, Arithmetic, Number System, HCF LCM, Verbal Analogy (Word Based Analogy), Visual Recognition and Figure Completion, Paper Folding and Cutting, Transformation of Shapes, Clocks and Calendars, Direction Sense, Cubes and Dice, Patterns in Two-Dimensional Figures, Seating Arrangements, Analogy and Classification, Logical Deduction and Induction, Alphabet and Word Tests, Mathematical Operations, Series Completion, Simplification and Approximation, Coding and Decoding, Numerical Reasoning, Assembling and Grouping of Shapes, Three-Dimensional Patterns and Visualization, Vocabulary, Number System, Averages, Mixtures and Alligation, Simple and Compound Interest, Percentages, Algebra, Speed, Time and Distance, Seating and Arrangement Puzzles, Traverse Surveying, Order, Ranking and Sequence, Constraint Puzzles, Syllogisms and Venn Diagrams, Reading Comprehension, Critical Reasoning, Permutations and Combinations, Narrative Sequencing, Project Monitoring, Resources and Safety, Profit, Loss and Discount, Ratio and Proportion, Time and Work, Mensuration, Data Interpretation, Powers, Surds and Logarithms, Sequences and Series, Articles and Determiners, Sentence Completion, Data Sufficiency, Blood Relations, Simple Interest and Compound Interest, Mixture and Alligation, Sequence and Series (Series), Speed Time and Distance, Algebra, Profit and Loss, Powers and Exponents (Surds and Indices), Permutation and Combination
  2. General Awareness: Physics, Chemistry, Biology, History, Geography, Polity, Indian Economy, Environment, Static General Knowledge, GK- Current Affairs, Artificial Intelligence, MS Office Applications, Terms & Abbreviations, Keyboard Shortcuts, Evolution of Indian Banking (Banking & Financial Awareness), Emerging Tech Trends
  3. Engineering Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Linear Algebra, Calculus, Probability, Statistics, Signal Space and Optimum Detection, Probability, Statistics
  4. Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep, Number Systems and Codes, Registers and Counters, Boolean Algebra and Logic Gates, Microprocessors and Microcontrollers, Logic Families and CMOS Logic, Microprocessors, Logic Gates and Boolean Algebra, Minimization of Boolean Functions, Timing, Hazards and Testing, Logic Families, Combinational Logic Design, Arithmetic Circuits, Waveform Generators and Timer Circuits, Semiconductor Memories and Programmable Logic Devices, Combinational Logic Circuits, Latches and Flip-Flops, Finite State Machines, Sequential Circuits and State Machines, Minimization of Boolean Functions, Arithmetic Circuits, Latches and Flip-Flops, Number Systems and Codes, Registers and Counters
  5. Computer Organisation & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer, Register Transfer and Microoperations, Semiconductor Memories and Programmable Logic, Processor Organization and Instructions, Memory Hierarchy and Input/Output, Registers and Counters
  6. Programming & Data Structures: 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, HTML Basics, OOPS with C++, Java, Object Oriented Technology
  7. Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization
  8. Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  9. Theory of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Security, Windows OS, Distributed Systems, Unix OS, Linux OS
  12. Computer Networks: Introduction to CN, 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, Data Communication, Website, Browser & Services, Web Design & Development, Network Security, Cyber Threats and Malware Attacks, Cyber Safety and Security
  13. Full Length Mock Tests:
  14. Sectional Tests:
  15. Paper 2 - Full-length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture introduces units of memory by first comparing decimal number names, SI metric prefixes, and binary powers. Three reference tables are displayed: 10^3 to 10^12 mapped to Thousand, Million, Billion, and Trillion; the same powers of ten mapped to kilo, Mega, Giga, Tera, and Peta; and 2^10 to 2^50 mapped to kilo through Peta. The instructor writes values such as 1,000 and 1,00,000 on the board, uses red arrows and checkmarks to link decimal powers with binary equivalents, and circles 10^3 and 2^10 to show that both represent a kilo. The lesson then transitions to the fundamental building blocks of memory: bit, nibble, and byte. A slide defines a bit as the smallest unit (0 or 1), a nibble as four bits, and a byte as eight bits. The instructor draws red boxes to visualize these groupings. Finally, the storage ladder is presented, listing KB = 1,024 Bytes, MB = 1,024 KB, and GB = 1,024 MB, with real-world examples such as an MP3 song and total world data to illustrate scale.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The opening slide displays three comparison tables. The left table lists 10^3 = 1 Thousand, 10^6 = 1 Million, 10^9 = 1 Billion, and 10^12 = 1 Trillion. The middle table pairs the same powers of ten with SI prefixes: kilo, Mega, Giga, Tera, and Peta. The right table lists binary equivalents: 2^10 = kilo, 2^20 = Mega, 2^30 = Giga, 2^40 = Tera, and 2^50 = Peta. The instructor begins writing red values on the board, starting with 1,000 and then 1,00,000, establishing the decimal progression that underlies the prefix system.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues building the decimal sequence on the whiteboard, writing 1,00,000 = 1M and extending to larger values. Red arrows connect the decimal table to the metric prefix table, visually mapping 10^3 to kilo and so on. The instructor circles 10^3 and 2^10 in red to emphasize that both represent the same magnitude, a kilo. Multiplication factors such as x100 and x1000 are written next to handwritten examples of 1,000 and 1,000,000 to explain how each prefix scales the previous one. The segment ends with a transition to a new slide titled Units of Memory, which lists Bit, Nibble, and Byte as the fundamental building blocks.

  3. 5:00 – 6:48 05:00-06:48

    The Units of Memory slide defines Bit as the smallest unit, just a 0 or 1; Nibble as a group of 4 bits; and Byte as a group of 8 bits. The instructor draws a red box representing four bits labeled Nibble, then a larger red box for eight bits labeled Byte. The lesson then moves to the Storage Ladder slide, which lists KB (Kilobyte) = 1,024 Bytes, MB (Megabyte) = 1,024 KB, and GB (Gigabyte) = 1,024 MB. Red underlines highlight key terms in the ladder examples, and real-world analogies such as an MP3 song are used to give students a sense of scale for each storage unit.

The lecture progresses from abstract numerical scales to concrete memory units. It begins by aligning three parallel systems: decimal names (thousand to trillion), SI prefixes (kilo to peta), and binary powers (2^10 to 2^50). The instructor uses handwritten values, red arrows, and circles on the whiteboard to show that 10^3 and 2^10 both correspond to kilo, establishing the bridge between decimal and binary measurement. This foundation leads directly into the definition of memory building blocks: bit, nibble, and byte, each visualized with hand-drawn boxes. The final section introduces the storage ladder, where each unit is 1,024 times the previous one (KB = 1,024 Bytes, MB = 1,024 KB, GB = 1,024 MB), tying the earlier binary powers to practical data storage. Real-world examples help students internalize the magnitude of each unit.

Loading lesson…