Quiz for Single-dimensional arrays

Q1: Which of the following correctly declares a single-dimensional array of integers in C?

A. int arr[10]; B. array int arr[10]; C. int arr; D. int[10] arr;

Q2: What is the index range of an array declared as int arr[5];?

A. 0 to 4 B. 1 to 5 C. 0 to 5 D. 1 to 4

Q3: Which of the following accesses the third element of array arr?

A. arr[2] B. arr[3] C. arr(3) D. arr{2}

Q4: If int arr[5] = {1,2,3}; is declared, what are the remaining elements initialized to?

A. 0 B. Garbage values C. Null D. Undefined

Q5: Which operator is used to access array elements?

A. [] B. () C. {} D. <>

Q6: What is the output of printf("%d", arr[0]); if int arr[3]={5,10,15};?

A. 5 B. 10 C. 15 D. 0

Q7: What will happen if you try to access arr[10] when arr is declared as int arr[5];?

A. Undefined behavior B. Compile-time error C. 0 is returned D. Segmentation fault always

Q8: Which of these correctly initializes all elements of an array to zero?

A. int arr[5] = {0}; B. int arr[5] = 0; C. int arr[5] = {00}; D. int arr[5] = null;

Q9: Array elements are stored in which order in memory?

A. Contiguous B. Random C. Linked D. Hierarchical

Q10: Which keyword is NOT used when declaring a normal array in C?

A. array B. int C. char D. float

Q11: If int arr[5]={1}; is declared, arr[1] will be?

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

Q12: Which of the following is NOT valid?

A. int arr[0]; B. int arr[1]; C. int arr[10]; D. int arr[]={1,2,3};

Q13: Which of the following correctly calculates the size of an array in bytes?

A. sizeof(arr) B. length(arr) C. count(arr) D. size(arr)

Q14: Which of these can be used to determine the number of elements in an array arr?

A. sizeof(arr)/sizeof(arr[0]) B. length(arr) C. arr.length D. count(arr)

Q15: Which of these is valid array initialization?

A. int arr[]={1,2,3}; B. int arr[3]={1,2,3,4}; C. int arr(3)={1,2,3}; D. array arr[3]={1,2,3};

Q16: In C, what is the default initial value of local array elements without explicit initialization?

A. Garbage values B. 0 C. Null D. Undefined

Q17: If int arr[5]; is declared globally, what will be the default values?

A. 0 B. Garbage values C. Null D. Undefined

Q18: Which of these is the correct way to pass an array to a function?

A. functionName(arr); B. functionName(&arr); C. functionName(*arr); D. functionName(arr[]);

Q19: Which statement is true about array name in C?

A. It acts as a pointer to the first element B. It holds the entire array C. It is an int value D. It is a char pointer always

Q20: What will printf("%d", 2[arr]); output if arr[]={10,20,30};?

A. 30 B. 20 C. 10 D. Error