Database Systems MCQs (Computer Science) From Textbook

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Database Systems Entrance Exam MCQs – Mock Test 165

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The Quiz: In a set, the NOT IN connective tests for the; "Nested Subqueries" App Download [Free] with answers: absence of set differences, set differences, absence of set membership, and data set membership for software engineering online courses. Learn Introduction to SQL Questions and Answers, Apple iBook to download free chapter for database administrator certification.

Nested Subqueries Quiz – Mock Test 165 PDF Download

MCQ: 821

In a set, the NOT IN connective tests for the

  1. Set differences
  2. Absence of set differences
  3. Data set membership
  4. Absence of set membership
MCQ: 822

Users describe the kinds of operations that will be performed on the data, on the specification of

  1. Data Requirements
  2. Data Gathering
  3. Procedural Requirements
  4. Functional requirements
MCQ: 823

To count the number of tuples in a relation, the aggregate function to be used is

  1. Avg
  2. Min
  3. Count
  4. Sum
MCQ: 824

A special case of multisets, which have only one copy of each element, is known to be

  1. Sets
  2. Elements
  3. Associator
  4. Aggregator
MCQ: 825

In entity relationship model, the basic objects are known as

  1. Instances
  2. Entries
  3. Nodes
  4. Entities

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