WGU D340 Questions and Answers | Latest Version | 2024/2025 | 100% Pass
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Course
WGU D340
Institution
WGU D340
WGU D340 Questions and Answers |
Latest Version | 2024/2025 | 100% Pass
What is the primary goal of data modeling in database design?
The primary goal of data modeling is to organize and structure data in a way that supports
efficient data management and retrieval in a database system.
Wh...
WGU D340 Questions and Answers |
Latest Version | 2024/2025 | 100% Pass
What is the primary goal of data modeling in database design?
✔✔ The primary goal of data modeling is to organize and structure data in a way that supports
efficient data management and retrieval in a database system.
What is a relational database?
✔✔ A relational database is a type of database that stores data in tables with rows and columns,
and relationships between tables are established using keys.
What is normalization in database design?
✔✔ Normalization is the process of organizing database tables to minimize redundancy and
ensure data integrity by dividing tables into smaller, more focused tables.
What is a primary key in a database?
✔✔ A primary key is a unique identifier for a record in a table, ensuring that each entry can be
uniquely distinguished from others.
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,What is the purpose of an index in a database?
✔✔ An index is used to speed up the retrieval of data from a database by creating a quick lookup
reference for specific columns.
What is the difference between a primary key and a foreign key?
✔✔ A primary key uniquely identifies records in a table, while a foreign key is a field in one
table that links to the primary key of another table, establishing a relationship between the two
tables.
What is the function of SQL (Structured Query Language) in a database?
✔✔ SQL is a language used to manage and manipulate databases, allowing users to query, insert,
update, and delete data.
What is a join operation in SQL?
✔✔ A join operation is used to combine rows from two or more tables based on a related
column, allowing data from multiple tables to be queried together.
What is a stored procedure?
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, ✔✔ A stored procedure is a precompiled collection of SQL statements that can be executed as a
single unit, often used to perform repetitive tasks in a database.
What is a trigger in a database?
✔✔ A trigger is a special kind of stored procedure that automatically executes in response to
certain events, such as an insert, update, or delete operation on a table.
What is data integrity in the context of database systems?
✔✔ Data integrity refers to the accuracy, consistency, and reliability of data within a database,
ensuring that the data remains correct and unaltered during operations.
What is a transaction in a database system?
✔✔ A transaction is a sequence of one or more database operations that are executed as a single
unit, ensuring that either all the operations are completed successfully, or none are applied if
there is an error.
What is ACID compliance in databases?
✔✔ ACID compliance refers to a set of properties (Atomicity, Consistency, Isolation,
Durability) that ensure reliable transaction processing in a database.
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