The Exam Module 13: Databases focuses on the foundational role of databases in managing, storing, and organizing data in a structured manner. In today’s digital age, where data drives decision-making and innovation, understanding databases is essential for both individuals and organizations. This module introduces the core concepts, types, and uses of databases, equipping learners with the knowledge to interact with and design data systems effectively.
Answer:
B:PostgreSQL
Contact information for all the people taking a class at a school are stored in a ________ called Students.
Answer:
D:table
Dana is creating a table that will show books for sale on a bookstore’s website. Which field in the table would best serve as its primary key?
Answer:
D:ProductID
Darcie has hired a programmer to make some custom changes to a DBMS she plans to move her business database to. What kind of DBMS is she using?
Answer:
D:Open source
Jenson needs to update his home address in his health insurance company’s database. Which of the following applications can he open on his computer so he can make these changes?
Answer:
A:A browser
Kian needs to sort a list of patients by birthdate to show the oldest patients first. What sort order on the birthdate field will give him this result?
Answer:
B:Smallest to largest
Kiera is building a front-end user interface for the database her new website will use. Which of the following languages is NOT used to build a webpage?
Answer:
C:SQL
Melody is building a database for a restaurant. Which pair of tables is least likely to need a direct relationship with each other?
Answer:
B:Customers, Ingredients
Mindy needs to run a SQL query that will pull the names and birthdates of all her students. What should the FROM phrase say in her query?
Answer:
A:FROM Students
Morgan needs to hire someone to help implement a business intelligence system for her company. What type of professional would be the best fit for this job?
Answer:
C:Data analyst
One of Eden’s customers has closed his account and moved to a different state. She needs to change his status to Inactive. What SQL command will accomplish this task?
Answer:
D:UPDATE
Raphael is working with a table in Access. He needs to see all the records for customers in Chattanooga so he can check the zip codes in that city. Which database tool will show only these records in the table?
Answer:
A:Filter
Scarlet needs to create a file to hold a list of expenses for an upcoming project, and she needs to do some basic calculations with the numbers in the budget. Which kind of file is the best fit for this purpose?
Answer:
A:Spreadsheet
Students who complete an online test are not allowed to change their test grades. What aspect of the CIA triad is at work here?
Answer:
B:Integrity
What characteristic of Big Data indicates how closely that data matches reality?
Answer:
B:veracity
What kind of database is needed to hold and organize diverse data types, such as X-ray images and doctors’ notes, in a medical database?
Answer:
D:Nonrelational database
What programming language supports relational databases?
Answer:
C:SQL
Which data repository type is most likely to include database tables and primary keys in its internal data structure?
Answer:
C:Data warehouse
Which data type would be best suited to a field that lists customer email addresses?
Answer:
D:Hyperlink
Which of the following fields would be most important to encrypt in a customer table?
Answer:
D:Customer’s credit card number
Which of the following would most likely be the key paired with a value of “Canada” in a nonrelational customer database?
Answer:
D:Country
Which of the following is a key aspect of database security according to the CIA triad security model? Choose two.
Answer:
Availability , Integrity
Which of the following scenarios would most likely rely on Big Data? Choose two.
Answer:
Evaluating applications for disability benefits , Calculating traffic delays during rush hour
A database backup can include information on who made what changes and when since the previous database backup.
Answer:
True
Aron is building a website that will require a back-end database. He plans to connect the web server on his network in a way that it will be easily accessible from the Internet. He should connect his database server the same way so data in the database is readily accessible to the web server.
Answer:
False
At the heart of this module is an exploration of what databases are and why they are critical. Databases are organized collections of data that allow for efficient retrieval, modification, and management. They form the backbone of numerous applications, from websites and mobile apps to business systems and analytics platforms. The module explains how databases enable organizations to handle large volumes of information reliably and ensure data integrity, accessibility, and security.
The module dives into different types of databases, focusing on relational and non-relational systems. Relational databases, such as MySQL and PostgreSQL, use tables to store data and rely on Structured Query Language (SQL) for querying and managing information. These databases are ideal for structured data and are widely used in industries ranging from finance to healthcare. Non-relational databases, like MongoDB and Cassandra, are designed to handle unstructured or semi-structured data, making them suitable for applications such as content management and real-time analytics. The module emphasizes how each type has unique strengths and use cases, helping learners understand when and why to use them.
Another important aspect of this module is database management systems (DBMS), which serve as the interface between users and databases. Learners are introduced to key DBMS features, such as data querying, indexing, transaction management, and backup capabilities. The module also explores the role of database administrators (DBAs) in ensuring optimal database performance, maintaining security protocols, and overseeing regular updates and backups to protect against data loss.
Modern trends in database technology are highlighted, including the rise of cloud databases, which offer scalability and accessibility over the internet, and distributed databases, which store data across multiple locations for greater reliability and speed. The module also touches on big data technologies and the integration of databases with machine learning and artificial intelligence, demonstrating how databases are evolving to meet the demands of increasingly complex data environments.
Real-world applications of databases are a key focus, showcasing their relevance across industries. In business, databases support customer relationship management (CRM) systems and supply chain operations. In healthcare, they are used for managing patient records and research data. In e-commerce, they power inventory tracking, order management, and personalized shopping experiences. This broad applicability underscores the importance of database literacy in a data-driven world.
By the conclusion of this module, learners gain a comprehensive understanding of databases, from their basic structure to their advanced applications. They are equipped with the knowledge to design, query, and manage databases while appreciating their transformative role in modern technology. This module inspires learners to explore further opportunities in database development and management, opening doors to careers in data science, software engineering, and information systems.
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