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What is the purpose of the 'getline()' function in C++?- a)It reads a line of text from the console.
- b)It converts a string to lowercase.
- c)It concatenates two strings.
- d)It searches for a substring within a string.
Correct answer is option 'A'. Can you explain this answer?
What is the purpose of the 'getline()' function in C++?
a)
It reads a line of text from the console.
b)
It converts a string to lowercase.
c)
It concatenates two strings.
d)
It searches for a substring within a string.
|
Omar Al Haddad answered |
Answer:
The getline() function in C is used to read a line of text from the console. It is a standard library function defined in the header file. The purpose of this function is to read a line of text, including spaces, from the user and store it in a character array or a string.
Working of getline() function:
1. The getline() function takes three arguments: the address of the character array where the input will be stored, the maximum number of characters to be read, and the file pointer from where the input is to be read.
2. It reads characters from the specified file pointer until it encounters a newline character or the maximum number of characters is read.
3. The newline character ('\n') is also read and stored in the character array.
4. The getline() function then appends a null character ('\0') at the end of the character array to mark the end of the string.
Example usage:
```c
#include
int main() {
char str[100]; // declare a character array to store the input
printf("Enter a line of text: ");
fflush(stdout); // flush the output buffer to display the prompt
fgets(str, sizeof(str), stdin); // use fgets() to read the line of text
printf("You entered: %s", str); // display the input
return 0;
}
```
Explanation:
In the above example, the getline() function is used to read a line of text from the user.
- The character array `str` is declared to store the input.
- The prompt "Enter a line of text: " is displayed using the printf() function.
- The fflush() function is used to flush the output buffer to ensure that the prompt is displayed before reading the input.
- The fgets() function is used to read the line of text from the user. The maximum number of characters to be read is specified as `sizeof(str)`, which ensures that the input does not exceed the size of the character array.
- Finally, the input is displayed using the printf() function.
This is how the getline() function is used to read a line of text from the console in C. It is a convenient way to handle input that includes spaces and newline characters.
The getline() function in C is used to read a line of text from the console. It is a standard library function defined in the header file
Working of getline() function:
1. The getline() function takes three arguments: the address of the character array where the input will be stored, the maximum number of characters to be read, and the file pointer from where the input is to be read.
2. It reads characters from the specified file pointer until it encounters a newline character or the maximum number of characters is read.
3. The newline character ('\n') is also read and stored in the character array.
4. The getline() function then appends a null character ('\0') at the end of the character array to mark the end of the string.
Example usage:
```c
#include
int main() {
char str[100]; // declare a character array to store the input
printf("Enter a line of text: ");
fflush(stdout); // flush the output buffer to display the prompt
fgets(str, sizeof(str), stdin); // use fgets() to read the line of text
printf("You entered: %s", str); // display the input
return 0;
}
```
Explanation:
In the above example, the getline() function is used to read a line of text from the user.
- The character array `str` is declared to store the input.
- The prompt "Enter a line of text: " is displayed using the printf() function.
- The fflush() function is used to flush the output buffer to ensure that the prompt is displayed before reading the input.
- The fgets() function is used to read the line of text from the user. The maximum number of characters to be read is specified as `sizeof(str)`, which ensures that the input does not exceed the size of the character array.
- Finally, the input is displayed using the printf() function.
This is how the getline() function is used to read a line of text from the console in C. It is a convenient way to handle input that includes spaces and newline characters.
Which of the following is not a valid method to concatenate two strings in C++?- a)Using the '+' operator
- b)Using the 'concat()' function
- c)Using the 'append()' function
- d)Using the 'strcpy()' function
Correct answer is option 'B'. Can you explain this answer?
Which of the following is not a valid method to concatenate two strings in C++?
a)
Using the '+' operator
b)
Using the 'concat()' function
c)
Using the 'append()' function
d)
Using the 'strcpy()' function
|
Sonal Yadav answered |
Using the 'concat()' function is not a valid method to concatenate two strings in C++.
Which of the following is the correct way to declare a string variable in C++?- a)'string s;'
- b)'char s[];'
- c)'char* s;'
- d)'string* s;'
Correct answer is option 'A'. Can you explain this answer?
Which of the following is the correct way to declare a string variable in C++?
a)
'string s;'
b)
'char s[];'
c)
'char* s;'
d)
'string* s;'
|
|
Sonal Yadav answered |
'string s;' is the correct way to declare a string variable in C++.
What is the output of the following code snippet?
string s = "Hello World";
cout << s.length() << endl;- a)11
- b)10
- c)12
- d)9
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
string s = "Hello World";
cout << s.length() << endl;
string s = "Hello World";
cout << s.length() << endl;
a)
11
b)
10
c)
12
d)
9
|
Reem Al Saadi answered |
Explanation:
String Length:
- The variable `s` is assigned the string "Hello World".
- The `length()` function in C++ returns the number of characters in the string.
- In the string "Hello World", there are 11 characters including the space.
Therefore, the output of the code snippet will be 11.
String Length:
- The variable `s` is assigned the string "Hello World".
- The `length()` function in C++ returns the number of characters in the string.
- In the string "Hello World", there are 11 characters including the space.
Therefore, the output of the code snippet will be 11.
Which of the following is the correct way to compare two strings in C++?- a)Using the 'compare()' function
- b)Using the '==' operator
- c)Using the 'equals()' function
- d)Using the 'strcmp()' function
Correct answer is option 'B'. Can you explain this answer?
Which of the following is the correct way to compare two strings in C++?
a)
Using the 'compare()' function
b)
Using the '==' operator
c)
Using the 'equals()' function
d)
Using the 'strcmp()' function
|
|
Sonal Yadav answered |
The correct way to compare two strings in C++ is using the '==' operator.
Which of the following functions can be used to convert a string to uppercase in C++?- a)'toupper()'
- b)'uppercase()'
- c)'to_upper()'
- d)'toUpper()'
Correct answer is option 'A'. Can you explain this answer?
Which of the following functions can be used to convert a string to uppercase in C++?
a)
'toupper()'
b)
'uppercase()'
c)
'to_upper()'
d)
'toUpper()'
|
|
Sonal Yadav answered |
The 'toupper()' function can be used to convert a string to uppercase in C++.
Which of the following functions can be used to convert a string to an integer in C++?- a)'toInt()'
- b)'stoi()'
- c)'atoi()'
- d)'toInteger()'
Correct answer is option 'B'. Can you explain this answer?
Which of the following functions can be used to convert a string to an integer in C++?
a)
'toInt()'
b)
'stoi()'
c)
'atoi()'
d)
'toInteger()'
|
|
Sonal Yadav answered |
The 'stoi()' function can be used to convert a string to an integer in C++.
What is the output of the following code snippet?
```cpp
string s = "Hello World";
int index = s.find("World");
cout << index << endl;
```- a)0
- b)6
- c)11
- d)-1
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string s = "Hello World";
int index = s.find("World");
cout << index << endl;
```
```cpp
string s = "Hello World";
int index = s.find("World");
cout << index << endl;
```
a)
0
b)
6
c)
11
d)
-1
|
|
Sonal Yadav answered |
The output of the code snippet is 6 because 's.find("World")' returns the starting index of the first occurrence of "World" in the string, which is 6 in this case.
What is the output of the following code snippet?
```cpp
string s = "OpenAI";
cout << s.at(5) << endl;
```- a)'A'
- b)'I'
- c)Compiler error
- d)Runtime error
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string s = "OpenAI";
cout << s.at(5) << endl;
```
```cpp
string s = "OpenAI";
cout << s.at(5) << endl;
```
a)
'A'
b)
'I'
c)
Compiler error
d)
Runtime error
|
|
Sonal Yadav answered |
The output of the code snippet is 'I' because 's.at(5)' returns the character at index 5, which is 'I' in this case.
Which of the following is a valid way to concatenate two strings in C++?- a)Using the '+' operator
- b)Using the 'concat()' function
- c)Using the 'append()' function
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Which of the following is a valid way to concatenate two strings in C++?
a)
Using the '+' operator
b)
Using the 'concat()' function
c)
Using the 'append()' function
d)
All of the above
|
|
Sonal Yadav answered |
All of the options are valid ways to concatenate two strings in C++.
What is the maximum number of characters that can be stored in a string object in C++?- a)255
- b)512
- c)1024
- d)Unlimited
Correct answer is option 'D'. Can you explain this answer?
What is the maximum number of characters that can be stored in a string object in C++?
a)
255
b)
512
c)
1024
d)
Unlimited
|
|
Sonal Yadav answered |
In C++, there is no specific limit on the number of characters that can be stored in a string object.
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.replace(6, 5, "C++");
cout << str;
```- a)Hello C++ld
- b)C++ World
- c)Hello C++
- d)Compilation error
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.replace(6, 5, "C++");
cout << str;
```
```cpp
string str = "Hello World";
str.replace(6, 5, "C++");
cout << str;
```
a)
Hello C++ld
b)
C++ World
c)
Hello C++
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "Hello C++ld" because replace(6, 5, "C++") replaces 5 characters starting from index 6 with the string "C++".
What is the maximum length of a string that can be stored in C++?- a)256 characters
- b)512 characters
- c)1024 characters
- d)It depends on the available memory
Correct answer is option 'D'. Can you explain this answer?
What is the maximum length of a string that can be stored in C++?
a)
256 characters
b)
512 characters
c)
1024 characters
d)
It depends on the available memory
|
|
Sonal Yadav answered |
The maximum length of a string that can be stored in C++ depends on the available memory.
What is the output of the following code snippet?
```cpp
string str = "OpenAI";
cout << str.substr(2, 3);
```- a)pen
- b)Open
- c)enA
- d)AI
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "OpenAI";
cout << str.substr(2, 3);
```
```cpp
string str = "OpenAI";
cout << str.substr(2, 3);
```
a)
pen
b)
Open
c)
enA
d)
AI
|
|
Sonal Yadav answered |
The output will be "pen" because substr(2, 3) extracts a substring starting from index 2 with a length of 3.
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.erase(5, 5);
cout << str;
```- a)Hello
- b)World
- c)HelloWorld
- d)Compilation error
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.erase(5, 5);
cout << str;
```
```cpp
string str = "Hello World";
str.erase(5, 5);
cout << str;
```
a)
Hello
b)
World
c)
HelloWorld
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "Hello" because erase(5, 5) removes 5 characters starting from index 5.
What is the output of the following code snippet?
```cpp
string str = "Hello World";
cout << str.find("World");
```- a)0
- b)5
- c)6
- d)-1
Correct answer is option 'C'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello World";
cout << str.find("World");
```
```cpp
string str = "Hello World";
cout << str.find("World");
```
a)
0
b)
5
c)
6
d)
-1
|
|
Sonal Yadav answered |
The output will be 6 because the find() function returns the position of the substring "World" within the string.
What is the return type of the 'find()' function in C++?- a)int
- b)size_t
- c)bool
- d)string
Correct answer is option 'B'. Can you explain this answer?
What is the return type of the 'find()' function in C++?
a)
int
b)
size_t
c)
bool
d)
string
|
|
Sonal Yadav answered |
The find() function returns a value of type size_t, which is an unsigned integer type.
Which function is used to find the length of a string in C++?- a)length()
- b)size()
- c)strlen()
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Which function is used to find the length of a string in C++?
a)
length()
b)
size()
c)
strlen()
d)
All of the above
|
|
Sonal Yadav answered |
All of the options (length(), size(), and strlen()) can be used to find the length of a string in C++.
Which of the following is not a valid way to compare two strings in C++?- a)Using the '==' operator
- b)Using the 'compare()' function
- c)Using the 'equals()' function
- d)All of the above
Correct answer is option 'C'. Can you explain this answer?
Which of the following is not a valid way to compare two strings in C++?
a)
Using the '==' operator
b)
Using the 'compare()' function
c)
Using the 'equals()' function
d)
All of the above
|
|
Sonal Yadav answered |
The equals() function is not a valid way to compare two strings in C++.
What is the output of the following code snippet?
```cpp
string str = "Hello World";
reverse(str.begin(), str.end());
cout << str;
```- a)Hello World
- b)dlroW olleH
- c)dlroW Hello
- d)Compilation error
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello World";
reverse(str.begin(), str.end());
cout << str;
```
```cpp
string str = "Hello World";
reverse(str.begin(), str.end());
cout << str;
```
a)
Hello World
b)
dlroW olleH
c)
dlroW Hello
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "dlroW olleH" because the reverse() function is used to reverse the string.
What will be the output of the following code?
```cpp
string s = "Hello";
cout << s.erase(1, 2);
```- a)"Hllo"
- b)"Hell"
- c)"Helo"
- d)"Hello"
Correct answer is option 'A'. Can you explain this answer?
What will be the output of the following code?
```cpp
string s = "Hello";
cout << s.erase(1, 2);
```
```cpp
string s = "Hello";
cout << s.erase(1, 2);
```
a)
"Hllo"
b)
"Hell"
c)
"Helo"
d)
"Hello"
|
|
Sonal Yadav answered |
The output of the code is "Hllo" because 's.erase(1, 2)' removes two characters starting from index 1.
What is the output of the following code snippet?
```cpp
string s = "Open";
string t = "AI";
string u = s + t;
cout << u.length() << endl;
```- a)3
- b)4
- c)5
- d)6
Correct answer is option 'C'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string s = "Open";
string t = "AI";
string u = s + t;
cout << u.length() << endl;
```
```cpp
string s = "Open";
string t = "AI";
string u = s + t;
cout << u.length() << endl;
```
a)
3
b)
4
c)
5
d)
6
|
|
Sonal Yadav answered |
The output of the code snippet is 9 because 'u.length()' returns the length of the string, which is 9 in this case.
What is the output of the following code snippet?
```cpp
string s = "Hello";
s += " World";
cout << s << endl;
```- a)"Hello"
- b)"World"
- c)"Hello World"
- d)Compiler error
Correct answer is option 'C'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string s = "Hello";
s += " World";
cout << s << endl;
```
```cpp
string s = "Hello";
s += " World";
cout << s << endl;
```
a)
"Hello"
b)
"World"
c)
"Hello World"
d)
Compiler error
|
|
Sonal Yadav answered |
The output of the code snippet is "Hello World" because 's += " World"' appends " World" to the existing string.
What is the output of the following code snippet?```cpp
string str = "Hello";
str[1] = 'X';
cout << str;
```- a)Hello
- b)HXllo
- c)Hllo
- d)Compilation error
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello";
str[1] = 'X';
cout << str;
```
string str = "Hello";
str[1] = 'X';
cout << str;
```
a)
Hello
b)
HXllo
c)
Hllo
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "HXllo" because str[1] is replaced with 'X'.
Which of the following string functions can be used to find the first occurrence of a character in a string?- a)'find()'
- b)'search()'
- c)'locate()'
- d)'find_first_of()'
Correct answer is option 'D'. Can you explain this answer?
Which of the following string functions can be used to find the first occurrence of a character in a string?
a)
'find()'
b)
'search()'
c)
'locate()'
d)
'find_first_of()'
|
|
Sonal Yadav answered |
The 'find_first_of()' function can be used to find the first occurrence of a character in a string.
What is the output of the following code snippet?
string s = "Hello World";
cout << s.substr(6) << endl;- a)"Hello"
- b)"World"
- c)"Hello "
- d)" World"
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
string s = "Hello World";
cout << s.substr(6) << endl;
string s = "Hello World";
cout << s.substr(6) << endl;
a)
"Hello"
b)
"World"
c)
"Hello "
d)
" World"
|
|
Sonal Yadav answered |
The output of the code snippet is "World" because 's.substr(6)' returns a substring starting from index 6, which is "World" in this case.
What will be the output of the following code?
```cpp
string s = "abcdefgh";
cout << s.substr(1, 3);
```- a)"bcd"
- b)"abc"
- c)"def"
- d)"cde"
Correct answer is option 'A'. Can you explain this answer?
What will be the output of the following code?
```cpp
string s = "abcdefgh";
cout << s.substr(1, 3);
```
```cpp
string s = "abcdefgh";
cout << s.substr(1, 3);
```
a)
"bcd"
b)
"abc"
c)
"def"
d)
"cde"
|
|
Sonal Yadav answered |
The output of the code is "bcd" because 's.substr(1, 3)' returns a substring starting at index 1 with a length of 3.
What is the output of the following code snippet?
```cpp
string str1 = "Hello";
string str2 = "World";
cout << str1 + " " + str2;
```- a)HelloWoorld
- b)Hello World
- c)HelloWorld
- d)Compilation error
Correct answer is option 'B'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str1 = "Hello";
string str2 = "World";
cout << str1 + " " + str2;
```
```cpp
string str1 = "Hello";
string str2 = "World";
cout << str1 + " " + str2;
```
a)
HelloWoorld
b)
Hello World
c)
HelloWorld
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "Hello World" because the + operator can be used to concatenate strings.
Which function is used to extract a substring from a string in C++?- a)substr()
- b)extract()
- c)sub()
- d)slice()
Correct answer is option 'A'. Can you explain this answer?
Which function is used to extract a substring from a string in C++?
a)
substr()
b)
extract()
c)
sub()
d)
slice()
|
|
Sonal Yadav answered |
The substr() function is used to extract a substring from a string in C++.
What is the output of the following code snippet?
string str = "Hello";
cout << str[2];- a)H
- b)e
- c)l
- d)o
Correct answer is option 'C'. Can you explain this answer?
What is the output of the following code snippet?
string str = "Hello";
cout << str[2];
string str = "Hello";
cout << str[2];
a)
H
b)
e
c)
l
d)
o
|
|
Sonal Yadav answered |
The output will be 'l' because string indexing starts from 0, so str[2] refers to the third character in the string.
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.insert(6, "C++ ");
cout << str;
```- a)Hello C++ World
- b)World Hello C++
- c)Hello World C++
- d)Compilation error
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Hello World";
str.insert(6, "C++ ");
cout << str;
```
```cpp
string str = "Hello World";
str.insert(6, "C++ ");
cout << str;
```
a)
Hello C++ World
b)
World Hello C++
c)
Hello World C++
d)
Compilation error
|
|
Sonal Yadav answered |
The output will be "Hello C++ World" because insert(6, "C++ ") inserts the string "C++ " at index 6.
What will be the output of the following code?
```cpp
string s = "abc";
cout << s.find_first_of("def");
```- a)-1
- b)0
- c)1
- d)2
Correct answer is option 'A'. Can you explain this answer?
What will be the output of the following code?
```cpp
string s = "abc";
cout << s.find_first_of("def");
```
```cpp
string s = "abc";
cout << s.find_first_of("def");
```
a)
-1
b)
0
c)
1
d)
2
|
|
Sonal Yadav answered |
The output of the code is -1 because 's.find_first_of("def")' searches for the first occurrence of any character in "def" within the string and returns the index. Since none of those characters are found, it returns -1.
What will be the output of the following code?
```cpp
string s = "Hello World";
cout << s.replace(6, 5, "Everyone").length();
```- a)11
- b)12
- c)13
- d)14
Correct answer is option 'C'. Can you explain this answer?
What will be the output of the following code?
```cpp
string s = "Hello World";
cout << s.replace(6, 5, "Everyone").length();
```
```cpp
string s = "Hello World";
cout << s.replace(6, 5, "Everyone").length();
```
a)
11
b)
12
c)
13
d)
14
|
|
Sonal Yadav answered |
The output of the code is 13 because 's.replace(6, 5, "Everyone").length()' replaces a substring starting at index 6 with "Everyone" and then returns the length of the resulting string.
What is the output of the following code snippet?
string s = "Hello World";
s.replace(6, 5, "Everyone");
cout << s << endl;- a)"Hello Everyone"
- b)"HelloWorld"
- c)"HelloWorld Everyone"
- d)"Hello WorldEveryone"
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
string s = "Hello World";
s.replace(6, 5, "Everyone");
cout << s << endl;
string s = "Hello World";
s.replace(6, 5, "Everyone");
cout << s << endl;
a)
"Hello Everyone"
b)
"HelloWorld"
c)
"HelloWorld Everyone"
d)
"Hello WorldEveryone"
|
|
Sonal Yadav answered |
The output of the code snippet is "Hello Everyone" because 's.replace(6, 5, "Everyone")' replaces a substring starting at index 6 with "Everyone".
What will be the output of the following code?
```cpp
string s = "apple";
string t = "apple";
if (s == t)
cout << "Equal";
else
cout << "Not Equal";
```- a)Equal
- b)Not Equal
- c)Compiler error
- d)Runtime error
Correct answer is option 'A'. Can you explain this answer?
What will be the output of the following code?
```cpp
string s = "apple";
string t = "apple";
if (s == t)
cout << "Equal";
else
cout << "Not Equal";
```
```cpp
string s = "apple";
string t = "apple";
if (s == t)
cout << "Equal";
else
cout << "Not Equal";
```
a)
Equal
b)
Not Equal
c)
Compiler error
d)
Runtime error
|
|
Sonal Yadav answered |
The output of the code is "Equal" because 's == t' compares the two strings for equality.
What is the output of the following code snippet?
```cpp
string str = "Programming";
cout << str.size() << " " << str.length();
```- a)11 11
- b)11 10
- c)10 11
- d)10 10
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str = "Programming";
cout << str.size() << " " << str.length();
```
```cpp
string str = "Programming";
cout << str.size() << " " << str.length();
```
a)
11 11
b)
11 10
c)
10 11
d)
10 10
|
|
Sonal Yadav answered |
The output will be "11 11" because size() and length() both return the length of the string.
What is the output of the following code snippet?
```cpp
string str1 = "Hello";
string str2 = "Hello";
if (str1.compare(str2) == 0)
cout << "Equal";
else
cout << "Not equal";
```- a)Equal
- b)Not equal
- c)0
- d)1
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string str1 = "Hello";
string str2 = "Hello";
if (str1.compare(str2) == 0)
cout << "Equal";
else
cout << "Not equal";
```
```cpp
string str1 = "Hello";
string str2 = "Hello";
if (str1.compare(str2) == 0)
cout << "Equal";
else
cout << "Not equal";
```
a)
Equal
b)
Not equal
c)
0
d)
1
|
|
Sonal Yadav answered |
The output will be "Equal" because the compare() function returns 0 when the strings are equal.
What does the 'c_str()' function do in C++?- a)It converts a string to a character array.
- b)It converts a character array to a string.
- c)It compares two strings.
- d)It finds the position of a substring within a string.
Correct answer is option 'A'. Can you explain this answer?
What does the 'c_str()' function do in C++?
a)
It converts a string to a character array.
b)
It converts a character array to a string.
c)
It compares two strings.
d)
It finds the position of a substring within a string.
|
|
Sonal Yadav answered |
The c_str() function is used to convert a string to a character array (C-style string).
What is the output of the following code snippet?
```cpp
string s = "OpenAI";
s[4] = 'B';
cout << s << endl;
```- a)"OpenBI"
- b)"OpenAIB"
- c)Compiler error
- d)Runtime error
Correct answer is option 'A'. Can you explain this answer?
What is the output of the following code snippet?
```cpp
string s = "OpenAI";
s[4] = 'B';
cout << s << endl;
```
```cpp
string s = "OpenAI";
s[4] = 'B';
cout << s << endl;
```
a)
"OpenBI"
b)
"OpenAIB"
c)
Compiler error
d)
Runtime error
|
|
Sonal Yadav answered |
The output of the code snippet is "OpenBI" because 's[4] = 'B'' replaces the character at index 4 with 'B'.
Which header file should be included to work with strings in C++?- a)iostream
- b)cstring
- c)string
- d)sstream
Correct answer is option 'C'. Can you explain this answer?
Which header file should be included to work with strings in C++?
a)
iostream
b)
cstring
c)
string
d)
sstream
|
|
Sonal Yadav answered |
The string header file (string.h) should be included to work with strings in C++.
Chapter doubts & questions for Strings - Basics of C++ 2025 is part of Software Development exam preparation. The chapters have been prepared according to the Software Development exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Software Development 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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