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Aggregate Functions Practice Test PDF Download eBook p. 357

Learn Aggregate functions mock test for exam, aggregate functions MCQ with answers pdf to solve data science test 357 for online job interview. Practice Introduction to SQL Trivia Questions and answers, aggregate functions Multiple Choice Questions (MCQ) for online DBMS, DBA. Free aggregate functions MCQs, database views, locking techniques for concurrency control, view of data, server system architecture in dbms, aggregate functions test prep for master's degree in computer science.

"The following query <br> select count (*) <br> from course; is used to find", aggregate functions Multiple Choice Questions (MCQ) with choices printing (*) in the course relation, printing (*) as the attribute of the course relation, the number of attributes in the course relation, and the number of tuples in the course relation for online computer engineering classes. Learn introduction to sql questions and answers with free online certification courses for BSc computer science.

Trivia Quiz on Aggregate Functions PDF Download eBook

Aggregate Functions Quiz

MCQ: The following query
select count (*)
from course; is used to find

  1. Printing (*) as the attribute of the course relation
  2. Printing (*) in the course relation
  3. the number of attributes in the course relation
  4. the number of tuples in the course relation

D

Server System Architecture in DBMS Quiz

MCQ: A single computer system that do not interact with other computer systems is called

  1. Processed database systems
  2. Decentralized database systems
  3. Centralized database systems
  4. Distributed database systems

C

View of Data Quiz

MCQ: A database may also have several schemas at the view level, known as

  1. Optimized schema
  2. Virtual Schema
  3. Model Schema
  4. Subschemas

D

Locking Techniques for Concurrency Control Quiz

MCQ: The concurrency control in which all the data on a specific page is locked is known to be

  1. Page-level locking
  2. Cluster level locking
  3. Data-level locking
  4. System-level locking

A

Database Views Quiz

MCQ: AN SQL view is said to be updatable, if the Select clause contains

  1. Only 1 attribute names
  2. Only 2 attribute names
  3. Only 3 attribute names
  4. Only 4 attribute names

A