6. Which method do we use to append more than one character at a time?

1. 1. append

   
   
   

   2. operator+=

   
   
   

   3. both append & operator+=

   
   
   

   4. data

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   data

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7. What is the output of this program?
   

   #include <iostream>
      #include <string>
      using namespace std;
      int main ()
      {
          string s ("Interview Mania");
          cout << s.capacity();
          cout << s.max_size();
          return 0;
      }
   

1. 1. Interview Mania

   
   
   

   2. 159223372036854775807

   
   
   

   3. Compilation Error

   
   
   

   4. 6 and max size depends on compiler

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   In this program, We are printing the capacity and max size of the string.

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8. What is the output of this program?
   

   #include <iostream>
       #include <string>
       using namespace std;
       int main ()
       {
           string s ("Interview Mania");
           for (size_t k = 0; k < s.length();)
           {
               cout << s.at(k-1);
           }
           return 0;
       }
   

1. 1. Interview

   
   
   

   2. Mania

   
   
   

   3. Interview Mania

   
   
   

   4. Compilation Error

   
   
   

   5. Runtime Error

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   terminate called after throwing an instance of 'std::out_of_range'
     what():  basic_string::at: __n (which is 18446744073709551615) >= this->size() (which is 15)
   timeout: the monitored command dumped core
   sh: line 1: 24994 Aborted                 timeout 10s main
   

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9. What is the header file for the string class?

1. 1. #include<str>

   
   
   

   2. #include<string>

   
   
   

   3. #include<ios>

   
   
   

   4. All of avove

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   #include<string>

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10. Which is used to return the number of characters in the string?

1. 1. width

   
   
   

   2. length

   
   
   

   3. size

   
   
   

   4. both size & length

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Both will return the number of characters that conform to the string’s content.

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