1)ios::trunc is used for ?a)If the file is opened for output operations and it already existed, no action is taken.b)If the file is opened for output operations and it already existed, its previous content is deleted and replacedby the new one.c)If the file is opened for output operations and it already existed, then a new copy is created.d)None of above2) Compile time polymorphism in C++ language area. Operator overloadingb. Function overloadingc. Function overridingd. B Onlye. A & B3)Choose the statement which is incorrect with respect to dynamic memory allocation.a. Memory is allocated in a less structured area of memory, known as heapb. Used for unpredictable memory requirementsc. Execution of the program is faster than that of static memory allocationd. Allocated memory can be changed during the run time of the program based on the requirement of theprogramin the derived class (in4)When the inheritance is private, the private methods in base class areC++).a. Inaccessibleb.. Accessiblec.. Protectedd. Public5)Choose the correct option?#includeusing namespace std;class Base {};class Derived: public Base {};int main()Base *bp = new Derived;Derived *dp = new Base;a. No Compiler Errorb.Compiler Error in line "Base *bp = new Derived;"c. Compiler Error in line " Derived *dp = new Base;"d. Runtime Error

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Answered: 2) Compile time polymorphism in C++…

2) Compile time polymorphism in C++ language are a. Operator overloading b. Function overloading c. Function overriding d. B Only e. A & B

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Class

Object Oriented Programming System (OOPs) is a programming model built on the perception of “objects” that contains data and methods. The major purpose of Object Oriented Programming is to increase the maintainability and flexibility of programs. Object Oriented Programming gets together data and its behavior (methods) in a single location (object) which makes it easier to understand.

Question

1)ios::trunc is used for ?
a)If the file is opened for output operations and it already existed, no action is taken.
b)If the file is opened for output operations and it already existed, its previous content is deleted and replaced
by the new one.
c)If the file is opened for output operations and it already existed, then a new copy is created.
d)None of above
2) Compile time polymorphism in C++ language are
a. Operator overloading
b. Function overloading
c. Function overriding
d. B Only
e. A & B
3)Choose the statement which is incorrect with respect to dynamic memory allocation.
a. Memory is allocated in a less structured area of memory, known as heap
b. Used for unpredictable memory requirements
c. Execution of the program is faster than that of static memory allocation
d. Allocated memory can be changed during the run time of the program based on the requirement of the
program
in the derived class (in
4)When the inheritance is private, the private methods in base class are
C++).
a. Inaccessible
b.. Accessible
c.. Protected
d. Public
5)Choose the correct option?
#include<iostream>
using namespace std;
class Base {};
class Derived: public Base {};
int main()
Base *bp = new Derived;
Derived *dp = new Base;
a. No Compiler Error
b.Compiler Error in line "Base *bp = new Derived;"
c. Compiler Error in line " Derived *dp = new Base;"
d. Runtime Error

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