Programming in Modern C++ | Week 4

2 months ago

Posted by PROGIEZ

9 minutes

Session: JAN-APR 2024

Course Name: Programming in Modern C++

Course Link: Click Here

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Quiz

Q1. Consider the following program.
Fill in the blank at LINE-1 so that the program will print 30.
a) friend class ReTest
b) class friend ReTest
c) static class ReTest
d) const class ReTest

Answer: a) friend class ReTest

Q2. Consider the following program.
Fill in the blank at LINE-1 so that the program will print 012.
a) using Test
b) namespace Test
c) using namespace Test
d) using namespace Test: :var

Answer: c) using namespace Test

Q3. Consider the following code segment.
Fill in the blank at LINE-1 so that the program will print 9.81.
a) mutable double
b) const double
c) static double
d) double mutable

Answer: a), d)

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Q4. Consider the following code segment.
What will be the output?
a) 10
b) 15
c) 20
d) 25

Answer: d) 25

Q5. Consider the following code segment.
Fill in the blank at LINE-1 so that the program will print 5.
a) display()
b) myClass: :display()
c) myClass.display()
d) myClass->display()

Answer: b) myClass: :display()

Q6. Consider the following code segment.
Change the LINE-1 with the appropriate option so that the program will run successfully.
a) using cout < greet;
b) using std:: cout « greet;
c) std:: cout < greet;
d) std.cout < greet;

Answer: c) std:: cout < greet;

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Q7. Consider the following code segment.
Which line/s will generate a compilation error?
a) LINE-1
b) LINE-2
c) LINE-3
d) LINE-4

Answer: a) LINE-1

Q8. Consider the following code segment.
What will be the output /error?
a) 0
b) 5
c) Compilation error: inaccessible object c1
d) Compilation error: undefined reference classB:: c1

Answer: d) Compilation error: undefined reference classB:: c1

Q9. Consider the following code segment.
What will be the output?
а) 0 3
b) 0 4
c) 1 3
d) 1 4

Answer: b) 0 4

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Programming

Question 1

Consider the program below.
• Fill in the blank at LINE-1 with appropriate keyword,
• Fill in the blank at LINE-2 with appropriate return type of the function,
• Fill in the blank at LINE-3 with the appropriate initialization statement of the static variable obj.
The program must satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;

class myClass {
    char c;
    static myClass* obj;
    myClass(char x) : c(x) { }
public:
    static myClass* create(char x) {
        if(!obj)
            obj = new myClass(x);
        return obj;
    }
    void show();
};

myClass* myClass::obj = nullptr;

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 2

Consider the following program.
• Fill in the blank at LINE-1 with the appropriate statement such that the global function can access private class members,
• Fill in the blank at LINE-2 with the appropriate statement such that the global function can access private class members
The program must satisfy the sample input and output.

Solution:

#include<iostream>
using namespace std;

class B;

class A {
    int x;
public:
    A(int _x) : x(_x) { cout << "Class A: "; }
    friend void print(int a, int b);
};

class B {
    int x;
public:
    B(int _x) : x(_x) { cout << "Class B: "; }
    friend void print(int a, int b);
};

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 3

Consider the following program.
• Fill in the blanks at LINE-1, LINE-2, LINE-3 and LINE-4 with appropriate keywords
The program must satisfy the sample input and output.

Solution:

#include<iostream>
using namespace std;
class Emp{
    int id;
    mutable double basic;                    //LINE-1
    mutable double salary;                   //LINE-2
    public:
        Emp(int i, double b, double s=0) : id(i), basic(b), salary(s){ }
        void setBasic(double b) const{        //LINE-3
            basic = b;
        }
        friend double calculate(const Emp&); //LINE-4
};

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These are Nptel Programming in Modern C++ Assignment 4 Answers

More Weeks of Programming in Modern C++: Click here

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Session: JULY-DEC 2023

Course Name: Programming in Modern C++

Course Link: Click Here

These are Nptel Programming in Modern C++ Assignment 4 Answers

Programming

Question 1
Consider the following program. Fill in the blanks as per the instructions given below:
• Complete the variable declaration at LINE-1,
• Complete the function prototype at LINE-2 and LINE-3 with appropriate keywords
such that it will satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class Employee
{
    const int id;
    string name;
    mutable int salary;

    public:
        Employee(int a, string b, int c) : id(a), name(b), salary(c) {}

        void updateSal(int x) const
        {
          salary += x;
        }

        void print() const
        { 
          cout << id << " : " << name << " : " << salary;
        }
};

These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 2
Consider the following program. Fill in the blanks as per the instructions given below.
• at LINE-1 with appropriate forward declaration,
• at LINE-2 with appropriate statement
such that it will satisfy the given test cases

Solution:

#include<iostream>
using namespace std;

class B;
class A
{
    int a_ = 0;
    public:
        A(int x) : a_(x) {}
        int mulB (B&);
        int subtractB (B&);
};
class B
{
    int b_;
    public:
        B(int y) : b_(y) {	}

        friend int A::mulB(B&), A::subtractB(B&);
};

These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 3
Consider the following program. Fill in the blanks at LINE-1, LINE-2 and LINE-3 with appropriate statements such that it will satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class Singleton{
    int data;
    static Singleton *ins;
    Singleton(int i) : data(i) {}
    public:
        int get(){ return data; }
        static Singleton* createIns(int i)
        {
            if(!ins)
                ins = new Singleton(i);
            return ins;
        }
        ~Singleton(){ cout << data; }
};

These are Nptel Programming in Modern C++ Assignment 4 Answers

More Weeks of Programming in Modern C++: Click here

More Nptel Courses: Click here

Session: JULY-DEC 2022

Course Name: Programming in Modern C++

Course Link: Click Here

These are Nptel Programming in Modern C++ Assignment 4 Answers

Quiz

Q1. Consider the following code segment.
What will be the output/error?
a) 15
b) 20
c) 30
d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition

Answer: d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition

Q2. Consider the following code segment.
What will be the output?
a) 2,5 4,6
b) 6,5 2,11
c) 6,11 2,5
d) 2,5 6,11

Answer: d) 2,5 6,11

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q3. Consider the following code segment.
What will be the output/error?
a) 0 1 2
b) 0 2 2
c) 2 0 1
d) Compilation Error: reference to ‘var’ is ambiguous

Answer: a) 0 1 2

Q4. Consider the following code segment.
Fill in the blank at LINE-1 such that the output will be 4 5.
a) mutable
b) static
c) const
d) friend

Answer: b) static

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q5. Consider the following code segment.
Fill in the blank at LINE-1 such that the program will print 15.
a) using e::e1 : : x
b) using e::e1
c) using namespace e::e1
d) using namespace e

Answer: a) using e::e1 : : x

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q6. Consider the following code segment.
Fill in the blank at LINE-1 such that the output is 10.
a) int mutable
b) mutable int
c) volatile int
d) const int

Answer: a, b

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q7. Consider the following code segment.
Fill in the blank at LINE-1 such that the output is 5.
a) name::Student s(5)
b) Students (5)
c) name. Student s(5)
d) using name::Student s(5)

Answer: a) name::Student s(5)

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q8. Consider the following code segment.
Fill in the blank at LINE-1 such that the program will print (2,5).
a) Point& operator<<(ostream&, Point&)
b) friend Point& operator<<(ostream&, Point&)
c) Point& friend operator<<(ostream&, Point&)
d) const Point& operator<<(ostream&, Point&)

Answer: b) friend Point& operator<<(ostream&, Point&)

These are Nptel Programming in Modern C++ Assignment 4 Answers

Q9. Consider the following code segment.
Fill in the blank at LINE-1 such that the program will print 5 15.
a) static class B
b) friend class B
c) class friend B
d) using class B

Answer: b) friend class B

These are Nptel Programming in Modern C++ Assignment 4 Answers

Assignment Questions

Question 1

Consider the program below which defines a class Database. Complete the program with the following instructions.
• Fill in the blank at LINE-1 to complete the declaration of member variable ins.
• Fill in the blank at LINE-2 to specify the return type of createIns() function.
• Fill in the blank at LINE-3 to call the createIns() function with parameter i.
The program must satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class Database{
    int id;
    static Database *ins;
    Database(int i) : id(i) {}
    public:
        int getIns(){ return id; }
        static Database *createIns(int i){
            if(!ins)
                ins = new Database(i);
            return ins;
        }
        ~Database();
};
Database *Database::ins = 0;
void fun(int i){
    Database *s = Database::createIns(i);

These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 2

Consider the following program.
• Fill in the blanks at LINE-1 to complete forward declaration.
• Fill in the blank at LINE-2 with appropriate function declaration so that function
calculate can access private data member of TotalAmount class.
The program must satisfy the sample input and output.

Solution:

#include<iostream>
using namespace std;

class Interest; //LINE-1
class TotalAmount{
    double prinAmt;
    double amt = 0;
public:
    TotalAmount(double p) : prinAmt(p){}
    double calculate(Interest&);
};
class Interest{
    double in;
public:
    Interest(double i) : in(i){ }

    friend class TotalAmount; //LINE-2
};

These are Nptel Programming in Modern C++ Assignment 4 Answers

Question 3

Consider the following program. Fill in the blanks as per the instructions given below:
• at LINE-1 to complete operator overload function,
• at LINE-2 and LINE-3 to calculate subtraction of two position class.
such that it will satisfy the given test cases.

Solution:

#include<iostream>
using namespace std;
class position{
    int x, y;
    public:
        position(int a, int b) : x(a), y(b) {}

        position operator-(const position& p1){

            position p(0,0);

            p.x = x-p1.x;

            p.y = y-p1.y;

            return p;
        }

These are Nptel Programming in Modern C++ Assignment 4 Answers

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These are Nptel Programming in Modern C++ Assignment 4 Answers

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These are Nptel Programming in Modern C++ Assignment 4 Answers

Quiz

Q1. Consider the following program.Fill in the blank at LINE-1 so that the program will print 30.a) friend class ReTestb) class friend ReTestc) static class ReTestd) const class ReTest

Programming

These are Nptel Programming in Modern C++ Assignment 4 Answers

Programming

Quiz

Q1. Consider the following code segment.What will be the output/error?a) 15b) 20c) 30d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition

Assignment Questions

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Related

Q1. Consider the following program.
Fill in the blank at LINE-1 so that the program will print 30.
a) friend class ReTest
b) class friend ReTest
c) static class ReTest
d) const class ReTest

Q1. Consider the following code segment.
What will be the output/error?
a) 15
b) 20
c) 30
d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition