Quiz Pre test chapter 4

What is the primary purpose of using arrays in computer programming?

• To create complex mathematical calculations

• To organize related data elements for easy sorting and searching

• To improve program execution speed

• To reduce memory usage in programs

In C++, if an array is declared as float scores[25], what is the valid range of index values?

• 1 to 25

• 0 to 24

• 0 to 25

• 1 to 24

When initializing an array during declaration, what happens if you provide fewer values than the array size?

• The program will generate an error

• The remaining elements will be filled with random values

• The remaining elements will be automatically filled with zeros

• The compiler will reject the initialization

In a two-dimensional array declaration int matrix[4][3], what does the first number in brackets represent?

• The number of columns

• The total number of elements

• The number of rows

• The starting index

Which of the following is the correct way to access the last element in an array named numbers with size 10?

• numbers[10]

• numbers[9]

• numbers[-1]

• numbers[sizeof(numbers)]

What happens when you declare an array without initializing its elements?

• Elements are automatically initialized to zero

• Elements contain garbage values

• Elements are initialized to null

• The program won't compile

In a two-dimensional array, how are elements stored in memory?

• In random order

• In separate memory segments

• In a row-major order (row by row)

• In column-major order (column by column)

What is the output of arr[i][j] if i=1 and j=2 in an array initialized as int arr[3][3] = {{1,2,3}, {4,5,6}, {7,8,9}}?

• 5

• 6

• 8

• 3

Which of the following declarations is valid for a one-dimensional array in C++?

• int array(10);

• array int[10];

• int[10] array;

• int array[10];

When passing an array to a function in C++, what is actually passed?

• A copy of the entire array

• The address of the first element

• The size of the array

• The last element of the array