Programming in Modern C++ | NPTEL 2023 | Week 1 Assignment Solutions

This set of MCQ(multiple choice questions) focuses on the Programming in Modern C++ NPTEL 2023 Week 1 Assignment Solutions.

Programming in C++ is so fundamental that all companies dealing with systems as well as application development (including web, IoT, embedded systems) have a need for the same. These include – Microsoft, Samsung, Xerox, Yahoo, Oracle, Google, IBM, TCS, Infosys, Amazon, Flipkart, etc. This course would help industry developers to be up-to-date with the advances in C++ so that they can remain at the state-of-the-art.

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Programming in Modern C++ NPTEL 2023 Week 1 Assignment Solutions

Q1. Consider the following program.

#include<iostream>
#include<algorithm>
#include<string.h>
using namespace std;

bool compare(char c1, char c2){
   return tolower(c1) > tolower(c2);    //LINE-1
}
int main(){
   char arr1[20] = "C++ Program", arr2[20] = "C Program";
   cout << lexicographical_compare(arr1, arr1+strlen(arr1), arr2, arr2 + strlen(arr2), compare);
   return 0;
}

What will be the output/error?

a) 1
b) 0
c) -1
d) Compilation Error: function is not defined

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Q2. Consider the following code segment.

#include<iostream>
#inlcude<algorithm>
using namespace std;

bool compare(int i, int j){
   return (i < j);
}

int main() {
   int data[] = {1, 2, 3, 4, 5};
   int key = 5;
   if(binary_search(_ _ _ _ _ _ _ _))   //LINE-1
      cout << "found";
   else
      cout << "not found";
   return 0;
}

Fill in the blank at LINE-1 so that the program will print “not found”?

a) &data[0], &arr[5], key
b) data, data+5, key
c) &data[0], &data[4], key
d) data+1, data+4, key

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Q3. Consider the following code segment.

#include<iostream>
#include<algorithm>
using namespace std;

int main() {
    int data[] = {50, 30, 40, 10, 20};
    sort (&data[1], &data[4]);
    for(int i=0; i<5; i++)
       cout << data[i] << " ";
    return 0;
}

What will be the output?

a) 10 20 30 40 50
b) 10 30 40 50 20
c) 50 10 30 40 20
d) 50 10 20 30 40

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Q4. Consider the following code segment.

#include<iostream>
#include<stack>
using namespace std;

int main() {
    int element[5];
    for(int i=1; i<=5; i++){
       *(element + i - 1) = i * 5;
    rotate(element, element + 4, element + 5);
    rotate(element, element + 1, element + 4);
    for(int i=0; i<5; ++i)
       cout << element[i] << " ";
    return 0;
}

What will be the output?

a) 5 10 15 20 25
b) 5 10 15 25 20
c) 20 10 15 25 5
d) 25 5 10 15 20

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Q5. Consider the following code segment.

What will be the output?

a) A A A B C Z Z Z
b) A A B B C Z Z Z
c) A A A B C Z Z
d) A A A B C Z Z Z Z

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q6. Consider the following code segment.

#include<iostream>
#include<string>
using namespace std;

int main(void) {
    string s1 = "C++ ";
    string s2 = "Program";
    _ _  _ __ _ _ _ ;      //LINE-1
    cout << s1;
    return 0;
}

Choose the appropriate option to fill in the blank at LINE-1, such that the output of the code would be: C++ Program.

a) s1 += s2
b) strcat(s1, s2)
c) s1.append(s2)
d) s1.insert(s2)

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Q7. Consider the following code segment.

Fill in the blank at LINE-1 such that the output is
5 2 3 4 5

a) data + 4 – i
b) data + 5 – i
c) data + i -4
d) data + i – 5

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q8. Consider the following code segment.

What will be the output?

a) 1234987654
b) 123498765
c) 1234897654
d) 123459876

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q9. Consider the following code segment.

Which statement/statements is/are correct?

a) STMT-1
b) STMT-2
c) STMT-3
d) STMT-4

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Programming in Modern C++ NPTEL 2022 Week 1 Assignment Solutions

Q1. Consider the following program.

#include<iostream>
#include<string>
using namespace std;

int main() {
    string greet = "Hello Student";
    _ _ _ _ _ _ _ _ _ _ _; // LINE-1
    cout << greet;
    return 0;
}

Fill in the blank at LINE-1 such that the output is Hello.

a) greet.resize(5)
b) greet.shrink_to_fit()
c) greet.copy(“Hello”, 5, 0)
d) strcpy(greet, “Hello”)

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Q2. Consider the following code segment.

#include<iostream>
#inlcude<algorithm>
using namespace std;

bool compare(int i, int j){
   return (i < j);
}

int main() {
   int arr[] = {4, 2, 6, 1, 7, 5};
   sort(_ _ _ _ _ _ _ _ _);  // LINE-1

   for(int i=0; i<6; i++)
        cout << arr[i] << " ";
   return 0;
}

Identify the appropriate option(s) to fill in the blank at LINE-1, such that the output is:
1 2 4 6 7 5

a) &arr[0], &arr[0]+4, compare
b) &arr[0], &arr[0]+3, compare
c) arr, arr+4, compare
d) &arr, &arr+4, compare

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Q3. Consider the following code segment.

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

int main() {
    int i;
    vector<int> arr;
    for(i=1; i<=9; i++)
       arr.push_back(i);
         
    rotate(arr.begin(), arr.begin()+3, arr.begin()+5);

    for(int i=0; i<arr.size(); i++)
        cout << arr[i] << " ";
    return 0;
}

What will be the output?

a) 3 2 1 4 5 6 7 8 9
b) 4 5 1 2 3 6 7 8 9
c) 5 6 7 1 2 3 4 8 9
d) 9 8 7 1 2 3 4 5 6

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Q4. Consider the following code segment.

#include<iostream>
#include<stack>
using namespace std;

int main() {
    int i;
    int arr[5] = {5, 7, 3, 6, 4};
    stack<int> s;

    for(i=0; i<5; i++){
       while(!s.empty()){
           if(s.top() < arr[i]){
               cout << s.top() << " ";
               break;
           }
           else
               s.pop();
       }
       if(s.empty())
            cout << -1 << " ";
     
       s.push(arr[i]);
    }
    return 0;
}

What will be the output/error?

a) -1 5 7 3 6
b) -1 5 5 3 3
c) -1 5 -1 3 3
d) Compilation Error: wrong template argument before s

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Q5. Consider the following code segment.

#include<iostream>
using namespace std;

int reverse(_ _ _ _ _ _, int r, int c) {    // LINE-1
       // code to reverse all the strings present in the matrix
       // and return it

int main() {
    int str[10][20]; // array of 10 strings
    reverse(str, 10, 20);
    return 0;
}

Choose the correct parameter-list for function header at LINE-1.

a) int str[][]
b) int str[][20]
c) int str[10][]
d) int str[10][20]

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q6. Consider the following code segment.

#include<iostream>
using namespace std;

int main() {
    bool i = true;
    bool j = false;
    bool k = false;
    cout << (i || j && k);
    return 0;
}

What will be the output?

a) 0
b) 1
c) false
d) true

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Q7. Consider the following code segment.

#include<iostream>
#include<string>
using namespace std;

int main() {
    string word1 = "Star ";
    string word2 = "Wars ";
    _ _ _ _ _ _   // LINE-1
    cout << str;
    return 0;
}

Choose the appropriate option(s) such that the output of the code segment would be
Start Wars

a) string str = strcat(word1, word2);
b) string str = word1 + word2;
c) string str = word1.insert(word2);
d) string str = word1.append(word2);

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q8. Consider the following code segment.

#include<iostream>
#include<algorithm>

int main() {
    int idata[] = {10, 20, 30, 40, 50}, k = 50;
    if(_ _ _ _ _ _ _ _ _ _ _ _ _ _)   // LINE-1
        std::cout << "key found";
    else
        std::cout << "key not found";
    return 0;
}

Choose the appropriate option to fill in the blank at LINE-1, such that the output of the code would be: key found

a) binary_search(idata, idata+4, k)
b) std::binary_search(idata, idata+4, k)
c) binary_search(idata, idata+5, k)
d) std::binary_search(idata, idata+5, k)

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Programming in Modern C++ NPTEL Week 1 Assignment Solutions

Q9. Consider the following code segment.

#include<iostream>
#include<algorithm>
using namespace std;

int main() {
    int idata[] = {1, 2, 2, 3, 4, 4, 5};
    replace(idata, idata+7, 2, 4);
    remove(idata, idata+7, 4);
    for(int i = 0; i < 3; ++i)
         cout << idata[i] << " ";
    return 0;
}

What will be the output?

a) 1 3 5
b) 1 2 2
c) 1 3 4
d) 1 2 4

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