Quiz for Declaration & initialization

Q1: Which is the correct way to declare an integer array of size 5 in C?

A. int arr[5]; B. int arr; C. array int[5]; D. int arr(5);

Q2: What is the index range for an array of size 10?

A. 0 to 9 B. 1 to 10 C. 0 to 10 D. -1 to 9

Q3: Which is a valid initialization of an integer array?

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

Q4: What happens if fewer values are given than the array size during initialization?

A. Remaining elements are set to 0 B. Compilation error C. Garbage values are assigned D. Array size changes

Q5: Which of the following is NOT a valid array declaration?

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

Q6: How can you declare and initialize a string in C?

A. char str[] = "Hello"; B. string str = "Hello"; C. char str = "Hello"; D. char str[5] = Hello;

Q7: What is the size of char str[] = "Hi";?

A. 3 B. 2 C. 4 D. Depends on compiler

Q8: Which statement is true about array size in C?

A. Must be a constant at compile time in C89 B. Can be variable in all C standards C. Array size is always dynamic D. Size is decided at runtime

Q9: Which is the correct way to initialize all elements to zero?

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

Q10: What will int arr[] = {1,2,3}; set the size to?

A. 3 B. Undefined C. 4 D. 0

Q11: Which of the following is correct for a float array?

A. float arr[3] = {1.1, 2.2, 3.3}; B. float arr[] = 1.1, 2.2, 3.3; C. float = {1.1, 2.2, 3.3}; D. float arr[3] = 1.1;

Q12: In C, uninitialized local arrays contain?

A. Garbage values B. Zero C. Random but fixed values D. Compiler error

Q13: Which declaration is valid for a 2D array?

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

Q14: What is the output of sizeof(int[10])?

A. Size of int * 10 B. 10 C. 4 D. Depends on array values

Q15: Which array declaration is invalid in C?

A. int arr[5]; B. int arr[0]; C. int arr[] = {1,2}; D. int arr[10] = {0};

Q16: Which syntax declares a constant integer array?

A. const int arr[3] = {1,2,3}; B. constant int arr[3] = {1,2,3}; C. final int arr[3] = {1,2,3}; D. int const arr[3] = 1,2,3;

Q17: What does int arr[3] = {1}; initialize?

A. arr[0]=1 and others=0 B. arr[0]=1, arr[1]=garbage C. Compilation error D. Undefined values

Q18: Which is the correct syntax to declare an array pointer?

A. int (*p)[5]; B. int *p[5]; C. array *p[5]; D. int *(*p)[5];

Q19: Which array initialization is valid for a char array?

A. char arr[4] = {'A', 'B', 'C', 'D'}; B. char arr[] = "ABCD"; C. char arr[5] = "ABCD"; D. All of these

Q20: If you omit the size in array declaration, what must be present?

A. Initializer list B. Pointer C. Memory allocation D. Nothing