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WorksheetsData and Database Fundamentals part 1
Total questions: 10
Worksheet time: 5mins
Alice is a junior data analyst in a company that maintains a large relational database for its internal systems. She's asked to comprehend the purpose of a primary key in a table. Which of the following BEST describes the primary purpose of a primary key in a relational database table?
To ensure all fields in a table can accept null values
To improve the aesthetic presentation of a table
To reduce the storage space used by a database
To ensure each record can be uniquely identified
When working with databases, which definition BEST describes a table?
The structure consisting of rows and columns that holds data
A system to ensure the security of the database
The rows that store the actual data values
The software used to manage the database
Which of the following statements BEST describes why investing in security is crucial for an organization?
It helps in marketing the products
It protects the organization's data and information assets
It increases the organization's profit margins
It makes the organization's website look more appealing
What is the purpose of replicating data between servers and potentially between sites?
To enhance network speed
To increase data storage capacity
To ensure service continuity and data availability in case of a disruption
To reduce network traffic
In network redundancy, what is the purpose of adapter teaming?
Providing fault tolerance and load balancing
Decreasing network traffic
Increasing network speed
Reducing power consumption
When populating a database, what does import/input refer to?
Transferring the database to another server
Querying data from the database
Deleting data from the database
Adding data records to the database manually or by importing from another source
Emily is a software developer who is developing a shopping website where users can login, add items to their carts, and check out. She wants the items in the cart to remain even if the user logs out or closes the browser, meaning she wants the cart data to persist. Which of the following techniques should Emily use to ensure the data persistence?
Store cart data in a transitory session variable
Store cart data in a volatile memory
Store cart data in a database
Store cart data in the website's HTML code
What is the role of a row in a Database Management System (DBMS)?
To improve the performance of database queries
To define the relationship between tables in the database
To control access permissions to the database
To represent a unique record in a database table
Which is TRUE about the role of data correlation in business analytics?
It entails linking related data points to identify patterns and trends.
It primarily involves isolating data sets to prevent bias.
It restricts the analysis to financial data to simplify compliance.
It focuses on deleting outdated or irrelevant data only.
Why is scalability important in a Database Management System (DBMS)?
To reduce the cost of maintaining the database
To prevent users from querying the database
To ensure the database can handle a growing amount of work effectively
To limit the size of the database
