array-and-strings

1).Which of the following is the correct syntax to declare an array in C++?

1) int arr[];

2) int[] arr;

3) array<int> arr;

4) None of the above

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2).What is the index of the first element of an array in C++?

1) 1

2) 0

3) -1

4) None of the above

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3).What will be the output of the following code?

#include <iostream>
using namespace std;

int main() {
int arr[] = {10, 20, 30, 40};
cout << arr[1];
return 0;
}

1) 10

2) 20

3) 30

4) 40

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4).Which function is used to find the length of a string in C++?

1) length()

2) size()

3) str_length()

4) None of the above

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5).Which of the following is the correct way to initialize a string in C++?

1) string str = "Hello";

2) char str[] = "Hello";

3) char[] str = "Hello";

4) All of the above

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6).Which of the following functions is used to copy one string to another in C++?

1) strcpy()

2) string_copy()

3) copy_string()

4) None of the above

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7).What will be the output of the following code?

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

int main() {
char str1[] = "Hello";
char str2[] = "Hello";
cout << (strcmp(str1, str2) == 0 ? "Equal" : "Not Equal");
return 0;
}

1) Equal

2) Not Equal

3) Error

4) None of the above

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8).What is the size of the array `int arr[5]` in C++?

1) 5

2) 10

3) 20

4) Depends on the compiler

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9).How do you access the third element of an array `arr[]` in C++?

1) arr[2]

2) arr[3]

3) arr(2)

4) arr(3)

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10).What is the correct way to declare a multidimensional array in C++?

1) int arr[3][3];

2) int arr[3,3];

3) int arr[3, 3] = {};

4) None of the above

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