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Select the code snippet which performs matrix multiplication.(a and b are the two given matrices, resultant marix is c)

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How do you allocate a matrix using a single pointer in C?(r and c are the number of rows and columns respectively)

int *arr = malloc(r * c * sizeof(int));

int *arr = (int *)malloc(r * c * sizeof(int));

int *arr = (int *)malloc(r + c * sizeof(int));

int *arr = (int *)malloc(r * c * sizeof(arr));

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Suppose the contents of an array A are, A = {1, null, null, null, null, 10};What would be the size of the array considering it as a normal array and a sparse array?

6 and 6

6 and 2

2 and 6

2 and 2

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Which of the following bitwise operations will you use to set a particular bit to 0?

AND

XOR

NAND

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Primitive method of using an array is said to be

Vector

Aggregate array

User defined array

Built-in array

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When do you use a sparse array?

When there are unique elements in the array

When the array has more occurrence of zero elements

When the data type of elements differ

In all of the mentioned cases

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