Database Systems Exam MCQs – Practice Test 12 (Chapter 21)

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SQL Concepts and Queries MCQs – Practice Test 12 PDF Download

MCQ 56: An SQL view is said to be updatable, if the clause has only one database relation i.e.:

Select clause
Where clause
Define clause
From clause

MCQ 57: The time of day, in hours, minutes, and seconds, is defined by the data type:

Date
Time
Timestamp
Calendar

MCQ 58: It is possible to store time-zone information along with the time by specifying:

time without timezone
date with timezone
time with timezone
date without timezone

MCQ 59: Contemporary database systems for naming relations provide a:

No hierarchy
2 level hierarchy
3 level hierarchy
4 level hierarchy

MCQ 60: An index on an attribute of a relation is a data structure that allows database system to find tuples in relation that have specified value for attribute:

Efficiently
Inefficiently
Costly
Optimized

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