Information Retrieval Techniques Quiz
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Questions and Answers

What functionality allows users to perform calculations directly in a search engine?

  • Weather Searching
  • Currency Conversion
  • Performing Calculations (correct)
  • Query Formulation

Which search operation is used to find content that contains an exact phrase?

  • Exclude words from Query
  • Exact Match (correct)
  • Wild Card based Searching
  • Searching Hash tags

Which method helps users filter out specific terms when searching?

  • Searching on Social Media
  • Flip a Coin
  • Including Synonyms
  • Exclude words from Query (correct)

When using Google for currency conversion, what do you input?

<p>Currency amount and conversion currency (C)</p> Signup and view all the answers

What feature is used to obtain information from multiple platforms including social media?

<p>Searching Hash tags (B)</p> Signup and view all the answers

What is a method to enhance a search query by including additional terms automatically?

<p>Wild Card based Searching (A)</p> Signup and view all the answers

Which searching trick is particularly useful for checking local weather conditions?

<p>Weather Searching (D)</p> Signup and view all the answers

How might capitalization affect the results of a search query?

<p>It has no effect on search results (D)</p> Signup and view all the answers

What is the primary issue when storing numeric values as Unicode?

<p>Increased storage requirements (C)</p> Signup and view all the answers

Which pixel encoding method involves transforming pixel data into a bitmap format?

<p>Pixel to Bitmap conversion (D)</p> Signup and view all the answers

Which aspect is crucial when handling colorful images in encoding methods?

<p>Color representation (A)</p> Signup and view all the answers

What is the main purpose of brightness chrominance in image representation?

<p>To separate color information from brightness (A)</p> Signup and view all the answers

What are sample intervals important for in sound representation?

<p>Measuring time between audio signals (D)</p> Signup and view all the answers

Which of the following best describes the process of sound data communication?

<p>Digital signal processing (D)</p> Signup and view all the answers

In image scaling, why are geometric structures important?

<p>To maintain aspect ratio during scaling (D)</p> Signup and view all the answers

How does the encoding of sound typically begin?

<p>With sound amplitude measurement (A)</p> Signup and view all the answers

What is the definition of 'Seek Time' in computing storage?

<p>The time required to locate a specific item of data. (A)</p> Signup and view all the answers

Which of the following is a limitation of ASCII codes?

<p>It supports a limited character set. (C)</p> Signup and view all the answers

What distinguishes SSDs from traditional hard drives?

<p>SSDs have no moving parts and use flash memory. (D)</p> Signup and view all the answers

Which optical storage format can hold the highest capacity?

<p>BD (Blue Ray Disk) (D)</p> Signup and view all the answers

What is one primary issue associated with magnetic and optical systems?

<p>They have lower data transfer rates compared to flash drives. (D)</p> Signup and view all the answers

What does 'Rotation Delay' refer to in the context of hard drives?

<p>The delay caused by the speed of the disk's rotation. (A)</p> Signup and view all the answers

In the context of flash drives, which technology is primarily utilized?

<p>Flash memory chips. (B)</p> Signup and view all the answers

What type of memory card is classified as 'SD'?

<p>Secure Digital Memory Card (D)</p> Signup and view all the answers

What is a common characteristic of deadlocks in operating systems?

<p>Processes hold resources while waiting for other resources. (A)</p> Signup and view all the answers

Which of the following is a type of security attack that originates from within the system?

<p>Insider threat (B)</p> Signup and view all the answers

Which protocol is essential for facilitating communication across the internet?

<p>Transmission Control Protocol (TCP) (D)</p> Signup and view all the answers

What describes the purpose of combining networks?

<p>To allow seamless communication between different types of networks. (D)</p> Signup and view all the answers

What method helps to avoid deadlock situations in operating systems?

<p>Resource allocation graph (C)</p> Signup and view all the answers

Which of the following is a key network classification?

<p>Peer-to-Peer networks (B)</p> Signup and view all the answers

Which of the following is a method for process communication?

<p>Shared memory (A)</p> Signup and view all the answers

What is typically a result of a security attack from outside the system?

<p>Unauthorized access to sensitive information (D)</p> Signup and view all the answers

What is a key feature of the binary search algorithm?

<p>It only works on sorted data. (D)</p> Signup and view all the answers

Which programming paradigm is emphasized by the recursive control in algorithms?

<p>Functional programming. (D)</p> Signup and view all the answers

How does algorithm efficiency typically get evaluated?

<p>According to its time and space complexity. (B)</p> Signup and view all the answers

What is the primary purpose of software verification?

<p>To ensure software correctness and reliability. (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of early generation programming languages?

<p>High-level abstraction from hardware. (B)</p> Signup and view all the answers

In the context of algorithms, what do 'recursive structures' primarily involve?

<p>Elements that reference themselves. (D)</p> Signup and view all the answers

What typically follows after demonstrating software verification examples?

<p>Documentation of errors identified. (A)</p> Signup and view all the answers

Which feature distinguishes early generation programming languages from later generations?

<p>Machine code compatibility. (A)</p> Signup and view all the answers

What is the primary focus of Module 171 in Artificial Intelligence?

<p>Intelligent Agents (C)</p> Signup and view all the answers

Which module primarily discusses the ability of machines to understand human language?

<p>Artificial Intelligence: Language Processing (D)</p> Signup and view all the answers

What concept does the Turing Test aim to evaluate?

<p>Machine mimicry of human behavior (C)</p> Signup and view all the answers

Which module deals with methodologies utilized in Artificial Intelligence research?

<p>Artificial Intelligence: Research Methodologies (C)</p> Signup and view all the answers

Which of the following areas is covered in Module 174?

<p>Artificial Intelligence: Understanding Images (B)</p> Signup and view all the answers

What is addressed in Module 173 of Artificial Intelligence?

<p>Artificial Intelligence: The Turing Test (C)</p> Signup and view all the answers

Module 176 is likely to cover which aspect of computing?

<p>Artificial Intelligence: Language Processing (A)</p> Signup and view all the answers

Which module introduces students to the foundational concepts of Artificial Intelligence?

<p>Artificial Intelligence: Introduction and Vision (D)</p> Signup and view all the answers

Flashcards

Search Engines

Tools used to find information on the internet.

Query

The words or phrases used to search for information.

Google Search

Popular search engine used to find information.

Search Operators

Special keywords helping narrow and refine searches.

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Weather Searching

Searching for weather information on a search engine.

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Calculations on Google

Performing mathematical calculations within a search engine.

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Currency Conversion

Converting currency values on a search engine.

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Search on Social Media

Searching for information from different social media sites.

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Seek Time

The time it takes for a hard disk drive's read/write head to move to the desired track.

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Access Time

The total time it takes to read or write data from a storage device.

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Transfer Rate

The speed at which data is transferred to or from a storage device.

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Compact Disk

An optical storage medium that uses lasers to read and write data.

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DVD

A type of optical disc that can store more data than a CD.

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Flash Drive

A portable storage device that uses flash memory.

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Solid State Drive (SSD)

A storage device that uses flash memory chips.

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ASCII Code

A standard way to represent text characters using numbers.

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Unicode

A system for encoding characters that allows for a wide range of characters from various languages.

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Binary Notation

A system of representing numbers using only two digits (0 and 1).

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Pixel

The smallest unit of a digital image.

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Bitmap Encoding

An encoding method that stores image data as a grid of pixels.

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Sound Amplitude

The measure of the intensity or loudness of a sound.

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Sample Interval

The time interval between measurements of sound amplitude.

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Image Scaling

Changing the size of an image

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Scalable Fonts

Fonts that can be displayed at various sizes without losing quality.

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Deadlock in OS

A situation where two or more processes are blocked indefinitely, waiting for each other to release resources.

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Security Attacks from outside

Threats to a system's security originating from external sources.

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Security Attacks from inside

Threats to a system's security initiated by someone with authorized access.

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Network Classification

Categorizing networks based on their size, geographic scope, and ownership.

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Network Protocols

Rules and standards that govern data communication between devices on a network.

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Combining Networks

Connecting different networks together to create a larger network.

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Process Communication Methods

Techniques used for processes within a network to exchange information and data.

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OS Security

Protecting the operating system from various threats, both internal and external.

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Recursive Structure

A way to break down a problem into smaller, similar subproblems. Each subproblem is solved using the same algorithm, leading to a solution by combining the solutions of the subproblems.

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Recursive Control

A method where an algorithm calls itself to solve a problem. The algorithm continues to call itself until it reaches a base case, which is a simple problem that can be solved without further recursion.

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Algorithm Efficiency

A measure of how well an algorithm performs. It assesses the algorithm's speed and memory usage based on its input size, helping to determine the best algorithm for specific tasks.

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Software Verification

Testing and analysis methods to ensure that software behaves as expected. It aims to identify errors and flaws in the software code to improve its reliability and quality.

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Early Generations of Programming Languages

Early programming languages, categorized into generations based on their characteristics and abilities. They represent the evolution of programming from machine-level instructions to higher-level languages with abstract features.

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Machine Language (1st Generation)

The most basic programming language, using binary codes (0s and 1s) to directly control computer hardware. It's difficult for humans to understand and write.

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Assembly Language (2nd Generation)

A symbolic language for writing instructions using mnemonics (abbreviations) instead of binary codes. It's easier to understand than machine language but still close to the hardware.

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High-Level Languages (3rd Generation)

Programming languages that resemble natural language and are easier for humans to understand and write. They use abstractions and concepts that are distant from hardware details.

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Artificial Intelligence

A branch of computer science that focuses on creating intelligent agents that can perform tasks typically requiring human intelligence, like understanding language, solving problems, and learning from data.

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Intelligent Agents

Software programs designed to act autonomously on behalf of a user or system, aiming to fulfill a specific goal.

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Turing Test

A test proposed by Alan Turing to assess a machine's ability to exhibit intelligent behavior equivalent to, or indistinguishable from, that of a human.

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Understanding Images

A key area in AI where computers are trained to interpret and analyze images, enabling applications like object recognition, image classification, and medical imaging analysis.

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Language Processing

The ability of computers to understand, interpret, and generate human language, enabling applications like machine translation, chatbot development, and sentiment analysis.

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AI Research Methodologies

Approaches and techniques used in AI research to develop and evaluate intelligent systems, including supervised learning, unsupervised learning, reinforcement learning, and evolutionary algorithms.

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What is the goal of AI?

The goal of AI is to create intelligent agents that can perform tasks typically requiring human intelligence, such as understanding language, solving problems, and learning from data.

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What is the Turing Test designed to assess?

The Turing Test is designed to assess a machine's ability to exhibit intelligent behavior equivalent to, or indistinguishable from, that of a human.

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Study Notes

Introduction to Computer Science

  • Computer Science is a discipline that builds a scientific foundation for various topics, including hardware and software.
  • Hardware comprises the physical components of a computer system (e.g., case, monitor, keyboard, mouse, internal parts).
  • Software, or software programs, are sets of instructions dictating computer tasks, encompassing applications and the operating system.
  • Programming is the creation of executable computer programs that solve specific tasks.
  • Networks connect multiple computers allowing resource sharing, primarily internet access.
  • Graphics involve generating images through computers used in various applications (photography, film, gaming).
  • Robots are programmable machines capable of performing complex actions automatically.
  • Database is an organized collection of data designed for efficient search, retrieval, modification, and deletion.
  • Security involves controls that ensure data confidentiality, integrity, and availability for software, hardware and firmware.
  • Algorithm is a set of instructions to perform a specific task.

Breadth First Learning

  • This course provides a basic introduction to many Computer Science subjects.
  • It covers various concepts (e.g., search engines, history of computing, data storage, data manipulation, networking, algorithms, programming languages, software engineering, AI, impacts on society, document processing, spreadsheets, and database systems).
  • Emphasis is on how computers function as a cohesive system.
  • Data abstraction hides complex tasks.
  • Data are organized in a hierarchy using various structures (arrays, lists, stacks, and queues)

Search Engines

  • Search engines index web pages and retrieve relevant pages based on user input (queries).
  • Popular ones include Google, Yahoo, and Bing.
  • Queries are sets of words.
  • Google interprets queries, returning relevant pages containing all terms.
  • Several search techniques enhance accuracy (e.g., use of quotation marks for exact phrases, excluding terms using -, and using prefixes).

Searching Tricks

  • Weather queries return location-specific weather data.
  • Calculations can be performed directly within the search engine (e.g., multiplication, division).
  • Currency conversions can be performed by including the target currency and desired amount.

Search Operators

  • Social Media searches (e.g., "Fifa World cup @facebook").
  • Price-based searches (e.g., "Laptop pkr 50000").
  • Hashtags on social media (e.g., #education).
  • Excluding terms (e.g., "Jaguar -cars").
  • Exact phrase searches (“Tallest Building in Pakistan").
  • Related websites searches (e.g., related:youtube.com).
  • Cached version searches (e.g., cache:youtube.com).
  • File type searches ("Virtual University" ext:pdf").

Advanced Search Operators

  • intitle, allintitle: Query is included in title.
  • inurl, allinurl: Query is included in URL.
  • intext, allintext: Query is included in body text.
  • AROUND(n): Query elements are separated by up to (n) words.

What not to search on the Internet

  • Avoid potentially sensitive/dangerous subjects.
  • Avoid cyber-security attacks and threats.
  • Avoid searching information capable of causing personal anxiety or distress

Roots of Computing

  • Abacus, widely used mechanical device in early calculations
  • Gear technology was used in earlier models of calculating machines.
  • Punch Cards played a significant role.
  • Electronic numerical integrator and calculator (ENIAC) a highly significant stage of progress toward modern computers
  • Factsheet of ENIAC, detailing its components and specifications.
  • Rapid advancements that followed led to transistors, integrated circuits.

Bits

  • The fundamental unit of information in computers, each representing a 0 or 1 state.
  • Bits can represent numerous forms of data (numbers, text, images).
  • Several bit units are combined (e.g., a byte is 8 bits).

Boolean Operations

  • AND, OR, XOR: Boolean logic operations on bits (True/False) used in computer work.

Storing Bits

  • Main Memory (RAM): Devices for storing data in computers.
  • Byte size organization, bit significance
  • Memory addresses, identifying unique locations.
  • DRAM, SDRAM concepts
  • Main memory Organization.

Magnetic Systems

  • Mass storage devices (e.g., hard drives, CDs, DVDs, tapes).
  • Zoned-bit recording and how it works
  • Seek Time, Rotation Delay, and transfer rate concepts

Optical Systems

  • Optical storage media (CDs, DVDs, and Blu-ray Disks).
  • Data storage formats (spiral tracks, sectors)

Flash Drives

  • Technology and advantages

Representing Text

  • Character codes (ASCII, Unicode).
  • Representing characters, symbols

Representing Numeric Values

  • Binary notation: Representing numbers using 0s and 1s
  • Two's complement and Floating point notation system
  • Binary Representation and it's use

Representing Images

  • Pixels: Fundamental unit for representing images
  • Encoding methods (black & white, shades of gray, RGB)
  • Brightness and Chrominance,
  • Geometry and Image scaling
  • Usage

Representing Sound

  • Representing audio: Sound Amplitude and how it's encoded
  • Sample Intervals.
  • Alternative methods (e.g. MIDI)

Binary Notation

  • Power method - converting decimal to binary and vice versa.
  • Algorithm to convert decimal to binary

2's Complement Notation

  • Representing Integer values, positive and negative

Excess Notation

  • Integer Representation
  • Representation and usage

Floating Point Notation

  • Representing Fractional Numbers (with radix points)
  • Components (sign, exponent, Mantissa)
  • Truncation Errors

Data Compression

  • Generic techniques, Lossy and Lossless

Compressing Images (GIF, JPEG, TIFF)

Compressing Audio and Video (MPEG, MP3)

Data Manipulation: CPU Basic

  • CPU components (Arithmetic logic unit, Control unit, Register unit).
  • General-purpose registers, special purpose registers
  • The fetch, decode and execute model for using instructions in the CPU
  • Steps for adding two values stored in memory (fetching, interpreting, executing)

Data Manipulation: Logic Operators

  • Bitwise operations - AND, OR, and XOR, their usage, and related masking techniques
  • Not operation - inverting bits

Data Manipulation: Rotation and Shift

  • Using Bitwise operations to shift data within bit patterns

Data Manipulation: Arithmetic Operators

  • Arithmetic operators for representing computation

Data Manipulation: Role of Controller

  • Controller hardware (e.g. for printers, disks)
  • Functions and advantages (eg DMA)
  • Communication on a computer bus between controller and CPU

Data Manipulation: Direct Memory Access and Handshaking

  • DMA, how it speeds up data retrieval
  • Advantages of using DMA in computer operations

Data Manipulation: Communication media and communication rates

  • Transmission,
  • Parallel & Serial communication methods

Data Manipulation: Program Execution

  • Fetching, decoding, and executing instructions
  • Using registers, memory, & program counters
  • Executing programs using the machine cycle

Data Management:Handling Competition Between Processes

  • Importance of resources (hardware & software)
  • Resource Allocation Issues

Data Management: Semaphores

  • Controlling access to shared resources,
  • Handling race conditions and preventing data corruption

Data Management: Deadlock

  • Problems: When multiple programs block for resources
  • Addressing Deadlocks: Preventing them or recovering from them, using techniques like deadlock detection.

Networking and the Internet: Network Classification

  • Various network types (PAN, LAN, MAN, WAN)
  • Open versus proprietary networks
  • Network topologies (bus and star networks)

Networking and the Internet: Internet Architecture

  • Hierarchy of ISPs (Tier 1, Tier 2, Tier 3)
  • Role of ISPs; their services to various parties.
  • Connection to end-user computers (“hosts”)

Networking and the Internet: Addressing

  • Unique addresses (IP addresses)
  • Dotted-decimal notation
  • Domain names, DNS lookup

Networking and the Internet: Applications

  • Email (SMTP, MIME, POP3, IMAP),
  • VoIP (Voice over Internet Protocol)
  • Streaming of multimedia content

Networking and the Internet: World Wide Web, HTML, and Web implementations

  • HTML, a document format for describing web pages
  • Client and Server roles
  • URLs (Uniform Resource Locators)
  • How URLs work, formats

Networking and the Internet: More on HTML

  • HTML tags
  • How different kinds of tags represent different components of a web page and their attributes

Networking and the Internet: XML

  • Syntax and design of XML (eXtensible Markup Language)
  • How it is used to create other forms of data representation (such as representing musical pieces)

Algorithm, an Informal Review

  • Set of steps determining/describing a task
  • Example of a simple algorithm to make a cup of tea

Algorithm: Formal Definition of Algorithm

  • Ordered, unambiguous steps with a guaranteed termination for a given input

Algorithm: Abstract Nature of Algorithms

  • Distinguishing between algorithms and their representations (abstract vs concrete)

Algorithm: Representation (Primitives)

  • Primitives, components that form the basic building blocks of computation or programming, in machine languages.

Algorithm: Representation (Pseudocode)

  • Pseudocode (a notational style) representing algorithms in a simpler structure than actual code.
  • while and if blocks inside pseudo code expressions or statements

Algorithm: Representation (Pseudocode) While-Structure

  • while loops (repeated execution of a set of statements as long as a given condition is true)

Algorithm: Representation (Pseudocode) Function-Structure

  • Functions (or procedures): Reusable blocks of code or activity that can perform certain computations

Algorithm: Discovery (The Art of Problem Solving)

  • Four steps to solving tasks: understanding the problem, creating a plan, executing the plan, evaluating the solution.

Algorithm: Algorithm Discovery Strategies

  • Stepwise Refinement: Tackling complex tasks in smaller, more manageable subtasks.
  • Using known algorithms for similar problems (analogous problem-solving)

Algorithm: Algorithm Efficiency

  • Analyzing the efficiency of algorithms
  • Comparing algorithms for performance in terms of time and/or space usage

Algorithm: Software Verification

  • Validating that an algorithm or program behaves exactly as intended, finding and correcting errors

Software Engineering: Software Life Cycle

  • Phases, steps of developing software: requirement analysis, design, implementation, testing, maintenance

Software Engineering: Requirement Analysis Phase

  • Identifying user needs, goals of the software, and related constraints
  • Software requirements specifications (SRS) that detail all requirements

Software Engineering: Design Phase

  • Internal structure of a software system is determined and defined

Software Engineering: Implementation Phase

  • Actual writing of the code for various software processes
  • Programming, creating data files, and creating databases

Software Engineering: Testing Phase

  • Testing for bugs and errors in the program (and other system artifacts)
  • Methods such as glass-box testing, black-box testing
  • Identifying error patterns, especially within modules

Software Engineering: Coupling

  • Understanding intermodule coupling (how much interaction does one module of a program have with others, and how does that affect performance)
  • Data coupling and Control Coupling: types of inter-module interactions
  • Global data, which is available to all modules in the whole program, as opposed to local data. Global data can negatively impact modular design, flexibility, and potentially the quality of a software product.

Software Engineering: Cohesion

  • Measures the relatedness or similarity of the components within a module.
  • Logical cohesion signifies internally similar activities.
  • Functional Cohesion focuses on a single function

Software Engineering: Information Hiding

  • Keeping internal details of a module hidden from other modules, encouraging modular design and minimizing the negative impact of any later code changes or errors.

Software Engineering: Components

  • Components as reusable program units or modules
  • How components are constructed and used in large systems (e.g. smartphones, user interfaces, database systems).

Software Engineering: Design Patterns

  • Methods for solving recurring design problems
  • Examples: Adapter, Decorator

Software Engineering: Design Patterns Examples

  • Examples of patterns (e.g., Factory, Shopping Cart) that demonstrate their use and applicability

Software Engineering Scope of Quality Assurance

  • Defining quality in software
  • Techniques or methods for evaluating the software (or related work products)
  • Reviews, testing, and documentation

Software Engineering: Software Ownership and Liability

  • Legal aspects of controlling the use of software
  • Understanding Copyright, Patents, etc.
  • Ensuring ownership and liability when sharing or using software created by others.

Database Systems: Role of Schema

  • Database organization through schemas, specifying the structure of the database and the relationships between its various parts
  • Separate schemas for different users help protect data

Database Systems: Database Management Systems (DBMS)

  • Software-based systems that handle the complexity of accessing and maintaining database files, abstracting the interactions between users and the actual organization of data in a database system.
  • Importance: data independence (users do not need to know how data is stored; DBMS hides that complexity)
  • Advantages: data security

Database Systems: Relational Database model

  • Representing data in tables

Database Systems: Issues of Relational Designs

  • Problems with data redundancy and inconsistencies
  • The necessity of splitting data across multiple tables to improve data efficiency, integrity, and organization

Database Systems: Select Operation

  • Subsetting (or filtering) data via selecting parts of a database from a particular file

Database Systems: Project Operation

  • Extracting columns of data (from one or many tables)

Database Systems: Join Operation

  • Combining data from multiple related relations/tables

Database Systems: Sequential Files

  • Recording data in order (files, records)
  • Techniques used for finding specific records, how end-of-file is determined (EOF/Sentinel)

Database Systems: Indexed Files

  • Arrangement of data to locate records quickly
  • Lookup table (indexes): Linking keys to data location

Database Systems: Hash Files

  • Using hashing algorithms to convert keys to storage locations

Database Systems: Data Mining

  • Exploring datasets and identifying patterns
  • Using data mining in many domains (e.g., marketing, medicine).

Database Systems: Data Mining Examples and Implications

  • Various data-mining methods and real-world use cases.

Artificial Intelligence/Intelligent Agents

  • Intelligent agents, their characteristics

Artificial Intelligence: Research Methodologies

  • Simulating and designing for intelligent agents

Artificial Intelligence: Turing Test

  • Benchmarking intelligent agents using a test to measure a potential machine's ability to exhibit human-like intelligence

Artificial Intelligence: Understanding Images

  • Recognizing features in images for computer understanding
  • Techniques and methods involved (e.g., edge enhancement, region finding, smoothing).

CS Impact on Society

  • Both positive and negative impacts of computer science on various life aspects (communication, healthcare, education, business).

CS Impact on Health

  • Positive and negative health impacts from the use of computers.

CS Impact on Environment

  • Environmental impacts (e.g., consumption of paper, waste generation, energy use).

CS Impact: Ethical Issues

  • Privacy in the digital world
  • Digital property (copyright, ownership).
  • Data gathering/tracking

CS Impact: Software Licenses and Information Privacy

  • Licenses for using software, their legal aspects
  • Software licenses, protecting intellectual property, considerations of liability.

CS Impact: Intellectual Property

  • Patents and copyrights: Establishing ownership of intellectual property in general.

CS Impact: Security

  • Protecting digital information,
  • Threats from cybercrime
  • Examples of security concerns, such as confidentiality, integrity, availability, and authentication

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