Intermediate PostgreSQL

Test your Intermediate-level Relational Databases Postgresql skills in Database Data Management. This timed assessment evaluates your expertise in Information Technology.

Duration: 5 minutes

•40 questions

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Question 1 of 40Assessment

Which join strategy does PostgreSQL use when both join inputs are sorted on the join keys?

A. Nested Loop Join, which iterates through every row of the first table for each row of the second.

B. Hash Join, which builds a memory-based hash table from the smaller of the two inputs.

C. Merge Join, which efficiently scans both sorted inputs simultaneously to find matches.

D. Bitmap Join, which uses an intermediate bitmap to identify rows before fetching them from disk.

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