400+ MySQL Interview Questions Practice Test

1. The first objective of normalizing a database is to scale back knowledge redundancy enhance knowledge integrity (A) as a result of it includes organizing knowledge in such a means that knowledge is saved solely as soon as, thus minimizing the danger of inconsistencies and enhancing the effectivity of information storage and updates.
2. In MySQL, to take away duplicate rows from a outcome set, you’d use the DISTINCT key phrase (A). It eliminates all duplicate rows, making certain that every row within the closing outcome set is exclusive.
3. The ACID properties are essential for managing database transactions successfully. They stand for Atomicity, Consistency, Isolation, and Sturdiness (B), they usually be sure that transactions are processed reliably, sustaining the integrity and consistency of information inside the database system.
4. Indexes in MySQL are mechanically created for major key columns (B). They pace up knowledge retrieval considerably however can decelerate knowledge insertion and updates as a result of the index have to be up to date every time the info it references modifications. Full-text indexes (C) are used particularly for text-based searches throughout giant our bodies of textual content inside a database. And no, they do devour extra space for storing (D).
5. The principle benefit of utilizing saved procedures in MySQL is to provide higher efficiency by lowering community visitors (B). Saved procedures mean you can execute a number of SQL operations as a single name and maintain the processing on the server aspect, thereby lowering the quantity of information transferred over the community. Whereas they will additionally provide safety advantages by encapsulating logic immediately on the database server (A), and supply centralized logic for advanced duties, their major benefit is efficiency enhancement by means of diminished community visitors.

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