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Two customers try to update the same account at nearly the s…

Two customers try to update the same account at nearly the same time. Which database component is responsible for preventing conflicts and helping keep the database consistent?

Published August 27, 2026
Categorized as Uncategorized

A Customers table has CustomerID as its primary key. An Orde…

A Customers table has CustomerID as its primary key. An Orders table stores CustomerID to indicate who placed each order. What is Orders.CustomerID?

Published August 27, 2026
Categorized as Uncategorized

A company requires every Employee row to have a Name. Which…

A company requires every Employee row to have a Name. Which constraint should be placed on the Name column?

Published August 27, 2026
Categorized as Uncategorized

A business wants data organized into tables with rows and co…

A business wants data organized into tables with rows and columns and plans to use SQL for querying. Which model is the best fit?

Published August 27, 2026
Categorized as Uncategorized

Two sets contain {a, b, c} and {c, b, a}. How should they be…

Two sets contain {a, b, c} and {c, b, a}. How should they be treated according to the slides?

Published August 27, 2026
Categorized as Uncategorized

An employee has not provided a middle name, and the value is…

An employee has not provided a middle name, and the value is unknown. What should be stored if the column permits missing data?

Published August 27, 2026
Categorized as Uncategorized

A developer needs to know what tables, columns, and indexes…

A developer needs to know what tables, columns, and indexes exist before generating a query. Which database component stores this directory information?

Published August 27, 2026
Categorized as Uncategorized

A table needs to store product prices such as 19.995 with th…

A table needs to store product prices such as 19.995 with three digits after the decimal and up to ten significant digits. Which data type from the slides is most appropriate?

Published August 27, 2026
Categorized as Uncategorized

A server fails after several updates. The DBMS uses a record…

A server fails after several updates. The DBMS uses a record of prior inserts, updates, and deletes to restore the database. Which component is being used?

Published August 27, 2026
Categorized as Uncategorized

Who has to be the last one to complete a d/c summary?

Who has to be the last one to complete a d/c summary?

Published August 27, 2026
Categorized as Uncategorized

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