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Programming & Databases MCQs | Mindaura

Home / Categories / Subjects / Programming & Databases

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Algorithms, data structures, SQL and web technology.

Computer Science · Programming & Databases

ANullableBDuplicateCUnique and not nullDAuto-increment only

Why? A primary key uniquely identifies each row and cannot contain NULL.

Asked in: PPSC

SASubmitted by Super Admin

Medium · Computer ScienceOpen details

Computer Science · Programming & Databases

AUNIQUEBDISTINCTCLOOPDONLY

Why? SELECT DISTINCT eliminates duplicate rows from the result set.

Asked in: PPSC

SASubmitted by Super Admin

Easy · Computer ScienceOpen details

Computer Science · Programming & Databases

ASELECTBWHERECORDER BYDGROUP BY

Why? The WHERE clause filters rows before grouping or ordering.

Asked in: PPSC

SASubmitted by Super Admin

Hard · Computer ScienceOpen details