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All questions of Strings for EmSAT Achieve Exam
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.
|
Sonal Yadav answered |
The 'getline()' function is used to read a line of text from the console.
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 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++.
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
|
Hani Al Wahidi answered |
Explanation:
The correct answer is option B, which states that using the `concat()` function is not a valid method to concatenate two strings in C.
Concatenating strings in C:
In C, there are multiple ways to concatenate two strings. Concatenation refers to combining two strings into a single string. Here are some commonly used methods:
1. Using the `+` operator:
The `+` operator is used for arithmetic operations in C, but it can also be used to concatenate two strings. However, it does not modify the original strings and creates a new string with the combined result.
2. Using the `strcat()` function:
The `strcat()` function is a standard library function in C, defined in the `string.h` header. It is specifically designed to concatenate two strings. It modifies the original string by appending the second string to the end of the first string.
3. Using the `strncat()` function:
Similar to `strcat()`, the `strncat()` function is used to concatenate two strings. However, it allows specifying the maximum number of characters to be appended from the second string.
4. Using the `strcpy()` and `strcat()` functions:
The `strcpy()` function is used to copy one string into another, and the `strcat()` function is used to concatenate two strings. By combining these functions, we can achieve string concatenation.
Invalid method: concat()
The `concat()` function is not a standard library function in C. It does not exist in the C standard library, so it cannot be used to concatenate strings. It might be a custom function defined by a programmer, but it is not a part of the standard C language.
In summary:
To concatenate two strings in C, the valid methods are using the `+` operator, `strcat()`, `strncat()`, or a combination of `strcpy()` and `strcat()`. The `concat()` function is not a valid method in C for string concatenation.
The correct answer is option B, which states that using the `concat()` function is not a valid method to concatenate two strings in C.
Concatenating strings in C:
In C, there are multiple ways to concatenate two strings. Concatenation refers to combining two strings into a single string. Here are some commonly used methods:
1. Using the `+` operator:
The `+` operator is used for arithmetic operations in C, but it can also be used to concatenate two strings. However, it does not modify the original strings and creates a new string with the combined result.
2. Using the `strcat()` function:
The `strcat()` function is a standard library function in C, defined in the `string.h` header. It is specifically designed to concatenate two strings. It modifies the original string by appending the second string to the end of the first string.
3. Using the `strncat()` function:
Similar to `strcat()`, the `strncat()` function is used to concatenate two strings. However, it allows specifying the maximum number of characters to be appended from the second string.
4. Using the `strcpy()` and `strcat()` functions:
The `strcpy()` function is used to copy one string into another, and the `strcat()` function is used to concatenate two strings. By combining these functions, we can achieve string concatenation.
Invalid method: concat()
The `concat()` function is not a standard library function in C. It does not exist in the C standard library, so it cannot be used to concatenate strings. It might be a custom function defined by a programmer, but it is not a part of the standard C language.
In summary:
To concatenate two strings in C, the valid methods are using the `+` operator, `strcat()`, `strncat()`, or a combination of `strcpy()` and `strcat()`. The `concat()` function is not a valid method in C for string concatenation.
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.
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 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 = "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 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'.
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 = "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 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++.
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 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 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).
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 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 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 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?
```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 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?
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 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";
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.
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 = "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 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 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 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 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 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 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.
Chapter doubts & questions for Strings - C++ for EmSAT Achieve 2025 is part of EmSAT Achieve exam preparation. The chapters have been prepared according to the EmSAT Achieve exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for EmSAT Achieve 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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C++ for EmSAT Achieve
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