Quiz for Multi-dimensional arrays

Q1: What is the correct way to declare a two-dimensional array in C?

A. int arr[2][3]; B. int arr[2,3]; C. int[2][3] arr; D. array int[2][3];

Q2: If int arr[3][4]; is declared, how many elements does it have?

A. 7 B. 12 C. 16 D. 8

Q3: Which is the valid initialization for int arr[2][2]?

A. {{1,2},{3,4}} B. {1,2,3,4} C. {{1},{2},{3},{4}} D. {{1,2,3,4}}

Q4: What is the index of element 5 in arr[2][3] if stored in row-major order?

A. [1][1] B. [2][2] C. [0][2] D. [1][2]

Q5: What will sizeof(int[3][5]) return if int is 4 bytes?

A. 15 B. 60 C. 12 D. 20

Q6: How are multi-dimensional arrays stored in memory in C?

A. Row-major order B. Column-major order C. Random order D. Depends on compiler

Q7: What is the base address of arr[3][4] in memory?

A. Address of arr[0][0] B. Address of arr[1][0] C. Address of arr[0][1] D. Address of arr

Q8: Which syntax correctly accesses the element in 2nd row, 3rd column of arr[4][4]?

A. arr[1][2] B. arr[2][3] C. arr[3][1] D. arr[2,3]

Q9: What happens if you access arr[3][5] in int arr[3][5]?

A. Valid access B. Undefined behavior C. Compiler error D. Returns garbage value

Q10: Which function parameter is correct for a 2D int array with 3 columns?

A. func(int arr[][3]) B. func(int arr[][]) C. func(int arr[3][]) D. func(int[3][3] arr)

Q11: What is printed by printf("%d", arr[1][2]); if arr={{1,2,3},{4,5,6}}?

A. 3 B. 4 C. 5 D. 6

Q12: Which is a valid 3D array declaration?

A. int arr[2][3][4]; B. int arr[2,3,4]; C. int arr[][][]; D. array int[2][3][4];

Q13: If int arr[2][3] = {{1,2,3},{4,5,6}}, what is arr[0][1]?

A. 1 B. 2 C. 3 D. 4

Q14: Which loop correctly traverses a 2D array arr[3][3]?

A. for(i=0;i<3;i++){for(j=0;j<3;j++){}} B. for(i=0;i<3;i++){for(j=0;j<2;j++){}} C. for(i=0;i<=3;i++){for(j=0;j<=3;j++){}} D. for(i=1;i<=3;i++){for(j=1;j<=3;j++){}}

Q15: If int arr[2][3] is declared but not initialized, what are the values?

A. All zeros B. Garbage values C. All ones D. Compiler error

Q16: Which statement is true about multi-dimensional arrays?

A. They are stored as arrays of arrays B. They are stored as linked lists C. They are stored in column-major order D. They are dynamic by default

Q17: If int arr[2][2] = {{1},{3}}, what is arr[0][1]?

A. 0 B. 1 C. 3 D. Garbage value

Q18: Which is NOT a valid operation on a 2D array?

A. Pointer arithmetic B. Assignment of entire array C. Element access D. Passing to function

Q19: If int arr[3][3], what is *(arr[1] + 2)?

A. arr[1][2] B. arr[2][1] C. arr[0][2] D. arr[2][0]

Q20: Which access is equivalent to *(*(arr + i) + j)?

A. arr[i][j] B. arr[j][i] C. arr[i+j] D. arr[i][j+1]