Database Management Systems Mcqs

Page No. 83

Which of the following operations need the participating relations to be union compatible?


aUNION

✖


bINTERSECTION

✖


cDIFFERENCE

✖


dAll of the above

✓


View Answer All of the above

Which of the following operation is used if we are interested in only certain columns of a table?


aPROJECTION

✓


bSELECTION

✖


cUNION

✖


dJOIN

✖


View Answer PROJECTION

What is a relationship called when it is maintained between two entities?


aUnary

✖


bBinary

✓


cTernary

✖


dQuaternary

✖


View Answer Binary

The conceptual model is


adependent on hardware.

✖


bdependent on software.

✖


cdependent on both hardware and software .

✖


dindependent of both hardware and software.

✓



Relational Algebra is


aData Definition Language

✖


bMeta Language

✖


cProcedural query Language

✓


dNone of the above

✖



SET concept is used in :


aNetwork Model

✓


bHierarchical Model

✖


cRelational Model

✖


dNone of these

✖


View Answer Network Model

E-R model uses this symbol to represent weak entity set ?


aDotted rectangle.

✖


bDiamond

✖


cDoubly outlined rectangle

✓


dNone of these

✖



The statement in SQL which allows to change the definition of a table is


aAlter

✓


bUpdate

✖


cCreate

✖


dselect

✖


View Answer Alter

It is possible to define a schema completely using


aVDL and DDL.

✖


bDDL and DML.

✓


cSDL and DDL.

✖


dVDL and DML.

✖


View Answer DDL and DML.

Count function in SQL returns the number of


avalues

✓


bdistinct values

✖


cgroups

✖


dcolumns

✖


View Answer values

Goto Page No.

Page 83 of 101

Alphabetical MCQs Categories
—

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"
—

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan