IT Issues and Data Management
29 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary key of the 'Courses' table in the ERD example?

  • Course ID (correct)
  • Course Title
  • Description
  • Credits

    • What is the purpose of a primary key in a relational database?

  • To provide a unique identifier for each record in a table (correct)
  • To ensure that all data in a column is of the same type
  • To store the date and time of when a record was last modified
  • To establish relationships between different tables

    • Which of the following is a characteristic of an entity in an ERD?

  • It represents a specific instance of data, like a single student record
  • It represents a thing, event, or person about which data is collected (correct)
  • It is always represented by a single attribute
  • It can be directly translated into a specific column within a database table

    • In the context of database development, what is the purpose of conceptual design?

    <p>To define the data structures and relationships using an ERD (B)</p> Signup and view all the answers

    What is the fundamental difference between a conceptual design and a logical design in database development?

    <p>All of the above (D)</p> Signup and view all the answers

    How are entities represented in a relational database?

    <p>As separate tables, each representing a particular entity type (C)</p> Signup and view all the answers

    What is the main purpose of a composite entity in a relational database?

    <p>To represent a relationship between two or more entities (A)</p> Signup and view all the answers

    Which of the following best describes the purpose of the 'Requirement Collection & Analysis' phase in database development?

    <p>To gather information from stakeholders to understand their needs (A)</p> Signup and view all the answers

    What is the correct term for a table in an Entity Relationship Diagram (ERD)?

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

    Which of the following describes the primary key in an entity table?

    <p>It is used to link tables together. (A), It is always underlined in a table. (D)</p> Signup and view all the answers

    What problem exists with the provided Employee table regarding its primary key?

    <p>There are empty spaces in the primary keys. (D)</p> Signup and view all the answers

    How does an attribute in an ERD relate to a table in a database?

    <p>An attribute becomes a column in the table. (B)</p> Signup and view all the answers

    Which of the following statements about email entries in the employee table is accurate?

    <p>Some entries contain additional information like Fax. (B)</p> Signup and view all the answers

    What is a key advantage of using a database over a spreadsheet for data management?

    <p>Minimization of data redundancy (D)</p> Signup and view all the answers

    Which feature of databases ensures that data remains accurate and consistent across all access points?

    <p>Single version of the truth (B)</p> Signup and view all the answers

    What does data integrity refer to in the context of databases?

    <p>Data meeting certain constraints (D)</p> Signup and view all the answers

    Which of the following is NOT a feature of database management systems (DBMS)?

    <p>Preventing data independence (A)</p> Signup and view all the answers

    How does a relational database improve data management?

    <p>By breaking datasets into smaller tables or relations (C)</p> Signup and view all the answers

    What is one of the primary uses of a DBMS?

    <p>To physically design a database (A)</p> Signup and view all the answers

    Which aspect of databases contributes most to enhancing data security?

    <p>High-security measures (A)</p> Signup and view all the answers

    What is a possible consequence of multiple users interacting with a spreadsheet at the same time?

    <p>Overwritten entries and data inconsistencies (B)</p> Signup and view all the answers

    What major advantage does cloud computing provide over traditional data storage methods?

    <p>Offers services without the need for a physical server (B)</p> Signup and view all the answers

    What is a primary concern with using multiple spreadsheets for data entry?

    <p>Prevents data from being updated consistently (A)</p> Signup and view all the answers

    What is 'data degradation' primarily associated with?

    <p>Physical problems with storage media (B)</p> Signup and view all the answers

    What is a common consequence of handling large spreadsheets in a work environment?

    <p>Long wait times when trying to access a spreadsheet (D)</p> Signup and view all the answers

    Which of the following is NOT a problem associated with the management of data?

    <p>Improved user satisfaction with data retrieval (A)</p> Signup and view all the answers

    What does the term 'Internet of Things' refer to?

    <p>Physical objects that connect to the internet wirelessly (C)</p> Signup and view all the answers

    Why might moving to a cloud-based spreadsheet still present challenges?

    <p>Spreadsheets can still be large and slow to open (B)</p> Signup and view all the answers

    What is one outcome of having data sourced from multiple origins?

    <p>Increased complexity in data integration and management (A)</p> Signup and view all the answers

    Flashcards

    Primary Key

    A unique identifier for a record in a table, ensuring no duplicates.

    Foreign Key

    An attribute that creates a link between two tables by referencing the primary key in another table.

    Entity

    A thing, event, or person that data is collected about, like a Student.

    Attribute

    A characteristic or property of an entity, such as Student ID.

    Signup and view all the flashcards

    Relation (Table)

    A two-dimensional structure with distinct column names and unique rows representing data.

    Signup and view all the flashcards

    Entity Relationship Diagram (ERD)

    A visual representation of entities and their relationships in a database.

    Signup and view all the flashcards

    Composite Entity

    An entity that represents both an entity and a relationship with its own attributes.

    Signup and view all the flashcards

    Conceptual Design

    The phase where the structure of the database is defined, often illustrated by an ERD.

    Signup and view all the flashcards

    Database

    A shared collection of interrelated data for multiple users.

    Signup and view all the flashcards

    Data redundancy

    Duplicating the same data in multiple locations in a database.

    Signup and view all the flashcards

    Data inconsistency

    Inconsistency arises when data is not uniformly accurate across a system.

    Signup and view all the flashcards

    Data security

    Measures to protect data from unauthorized access or harm.

    Signup and view all the flashcards

    Data integrity

    Ensuring accuracy and consistency of data throughout its lifecycle.

    Signup and view all the flashcards

    Data independence

    Applications and data are not linked, allowing flexible access.

    Signup and view all the flashcards

    Relational database

    A type of database that structures data in tables (relations).

    Signup and view all the flashcards

    DBMS (Database Management System)

    Software used to create and manage databases.

    Signup and view all the flashcards

    Internet of Things (IoT)

    Devices that connect to the internet without cables, like phones and cars.

    Signup and view all the flashcards

    Cloud Computing

    Accessing services and data over the internet without physical servers.

    Signup and view all the flashcards

    Data Exponential Growth

    Data increases rapidly over time from multiple sources.

    Signup and view all the flashcards

    Data Degradation

    Deterioration of storage media affecting data access due to environmental factors.

    Signup and view all the flashcards

    Spreadsheet Issues

    Problems faced when multiple users try to access large spreadsheets simultaneously.

    Signup and view all the flashcards

    Cloud Spreadsheet Benefits

    Allows multiple users to edit a spreadsheet simultaneously, improving collaboration.

    Signup and view all the flashcards

    Data Management Challenges

    Difficulties such as needing to constantly update and maintain data integrity.

    Signup and view all the flashcards

    Relation

    A table in an Entity-Relationship Diagram (ERD), representing data.

    Signup and view all the flashcards

    Unique Attribute

    An attribute in an entity that is distinct for each record, serving as a primary key.

    Signup and view all the flashcards

    ERD

    Entity-Relationship Diagram, a visual representation of data and relationships.

    Signup and view all the flashcards

    Study Notes

    Information Technology (IT) Issues

    • IT professionals often overlook user needs.
    • Internet of Things (IoT): Devices connected to the internet (e.g., cellphones, cars, watches) without cables.
    • Cloud Computing: Services delivered without a physical server. This is achieved through virtualization; users access services remotely. Example: University email is accessed through internet connectivity.

    Managing Data Difficulties

    • Data increases exponentially over time.
    • Data comes from various sources (internal, personal, external).
    • New data sources emerge, such as AI-generated content.
    • Data "rot" occurs when data becomes outdated (e.g., changing phone numbers, addresses).

    Maintaining Data

    • Data degradation: Issues related to data storage media (e.g., temperature, humidity, light exposure). These issues negatively affect data security, quality, and integrity.
    • Data needs a reliable physical environment that also requires maintenance.
    • Data needs to be stored securely and be accessible at any time.

    Spreadsheet Approach Issues

    • Spreadsheet programs (e.g., Excel) can crash due to large amounts of data.
    • Large numbers of orders in a spreadsheet create difficulties for multiple employees to manage.
    • Multiple employees editing the same spreadsheet may create inconsistencies in the data.
    • It is challenging to keep track of orders efficiently when dealing with large-scale data and customer interactions.

    Spreadsheet Alternatives:

    • Breaking down a large spreadsheet into smaller spreadsheets to avoid crashes.
    • Using cloud-based methods (i.e., storing excel sheets in cloud storage) to allow access for multiple users.
    • Utilizing a database for order management.

    Database Approach

    • A database is a shared and organized collection of interrelated data to meet the needs of numerous users.
    • This approach offers efficient, dependable, and safe multi-user data storage for large datasets.
    • Data is stored in a consistent and convenient form.
    • It minimizes issues like data redundancy (same data not repeated in multiple places) and data inconsistency.

    Database Design and Implementation

    • Database Management Systems (DBMS) are automated tools for database design and implementation. (e.g., SQL Server, MySQL, PostgreSQL).
    • Relational databases break down data sets into smaller, organized data sets and tables.
    • A Relational Database Management System (RDBMS) organizes data into tables that contain relations between each other. Tables are defined by columns and rows. Key attributes that link the tables are termed primary keys. Primary keys ensure data integrity. Tables consist of attributes, which represent different characteristics. Each row in a table has distinct attributes that uniquely define it.

    Entity Relationship Diagram (ERD) Diagrams

    • ERDs illustrate the relationship between entities in a database.
    • ERDs make it easier to access and understand the structure of a database. Entities in an ERD map into tables, and attributes map into columns (e.g., relationship between "student" and "Course").

    Exercise Example Evaluation

    • Is an example spreadsheet table, (such as the employee table above) an actual relational database? No.
    • Some problems identified by checking relations, like empty spaces in primary keys or redundancy in other attributes.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Lecture 4: Managing Data PDF

    Description

    This quiz covers critical issues in Information Technology including user needs, Internet of Things (IoT), and cloud computing. It also explores challenges in managing and maintaining data in various formats, emphasizing the importance of data integrity and security. Test your knowledge on IT trends and data management strategies.

    More Like This

    IT for Information System Security and Ethical Challenges Quiz
    5 questions

    IT for Information System Security and Ethical Challenges Quiz

    RemarkablePyrope avatar
    RemarkablePyrope
    IT Knowledge Challenge
    5 questions

    IT Knowledge Challenge

    MatchlessVibrance avatar
    MatchlessVibrance
    Challenges of Data Exchange in Smart Hospitals
    18 questions

    Challenges of Data Exchange in Smart Hospitals

    TollFreeDarmstadtium avatar
    TollFreeDarmstadtium
    AI Impact on IT Law
    43 questions

    AI Impact on IT Law

    WellPositionedJasper8398 avatar
    WellPositionedJasper8398
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser