Object Oriented Programming MCQs

Page No. 84

What does dynamic_cast return after successful type casting?


aAddress of object which is converted

✓


bAddress of object that is used for conversion

✖


cAddress of object that is mentioned in the syntax

✖


dDoesn’t return any address

✖



What should be used for safe downcast?


aStatic cast

✖


bDynamic cast

✓


cManual cast

✖


d Implicit cast

✖


View Answer Dynamic cast

Downcasting ____________________


aCan result in unexpected results

✓


bCan’t result in unexpected result

✖


cCan result only in out of memory error

✖


dCan’t result in any error

✖



Downcasting is _______________________


aAlways safe

✖


bNever safe

✓


cSafe sometimes

✖


d Safe, depending on code

✖


View Answer Never safe

Which among the following is a mandatory condition for downcasting?


aIt must not be done explicitly

✖


bIt must be done implicitly

✖


cIt must be done explicitly

✓


dIt can’t be done explicitly

✖



What is downcasting?


aCasting subtype to supertype

✖


bCasting supertype to subtype

✓


cCasting subtype to supertype and vice versa

✖


dCasting anytype to any other type

✖



How does compiler convert “::operator new” implicitly?


aoperator new( sizeof( type ) )

✓


boperator new( sizeof( ) )

✖


cnew operator :: type sizeof( type )

✖


dnew sizeof( type ) operator

✖



If a new operator is defined for a class and still global new operator have to be used, which operator should be used with the keyword new?


aColon

✖


bArrow

✖


cDot

✖


dScope resolution

✓


View Answer Scope resolution

The new operator _________________


aInvokes function operator new

✓


bDoesn’t invoke function operator new

✖


cInvokes function operator only if required

✖


dCan’t invoke function operator new implicitly

✖



The objects allocated using new operator ________________


aAre destroyed when they go out of scope

✖


bAre not destroyed even if they go out of scope

✓


cAre destroyed anytime

✖


dAre not destroyed throughout the program execution

✖



Goto Page No.

Page 84 of 93

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