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Database Engineering & Storage Systems
Database Management Systems (DBMS)
Quiz
Chapter Quiz: Database Management Systems (DBMS)
Mastery Assessment: DBMS Architecture
Complete this assessment with 100% score to master this chapter.
01
What is the primary role of the 'Query Optimizer' in a DBMS?
To check the user's password.
To analyze a SQL query and determine the most efficient execution plan (e.g., using an index vs. a full table scan).
To compress the database files.
To automatically delete old data.
02
How does a 'Buffer Pool' improve database performance?
By storing SQL queries in a list.
By caching frequently accessed data pages in RAM to minimize slow disk I/O.
By encrypting data before it is saved.
By automatically generating primary keys.
03
What is the difference between 'Volcano' (Tuple-at-a-time) and 'Vectorized' query execution?
Volcano is for cloud databases, Vectorized is for local.
Volcano processes one row at a time through the operator tree, while Vectorized processes batches of rows to utilize CPU cache and SIMD.
Volcano is faster for large datasets.
There is no difference; they are synonyms.
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