DCS1101 - Week 9 (Arrays)

Multiple Choice

Array indexing begins with what number?

• 0
• -1
• 1
• 5

Multiple Choice

Which declaration is correct?

• int num[5];

• int[5] num;

• num int[5];

• array int num(5)

Multiple Choice

What will this output show if
int bats = {3,5,7}

cout << bats[1];

• Output: 5
• Output: 3
• Output: 7
• Output: Error

Multiple Choice

Default values in uninitialized local array?

• Uninitialized local arrays have indeterminate values.
• Uninitialized local arrays have fixed values assigned.
• Uninitialized local arrays contain default values of zero.
• Uninitialized local arrays are always zeroed out.

Draw

Draw a spooky array called ghosts[5] and label each index with a different ghost.

Draw

Draw a memory box diagram showing how pumpkin[4] = 13 is stored.

Open Ended

Why is accessing out-of-range elements dangerous

Multiple Choice

Which of the code prints an entire row of arrays?

• Use print(array[row_index]) to print an entire row of arrays.
• print(array[row_index].toString()) outputs the row as a string.
• print(array[row_index:]) will show the row and the following rows.
• Use print(array[row]) to display the entire array.

Multiple Choice

To modify array inside function, what is the best practice?

• Return a new array instead of modifying the original
• Pass the array by reference or use mutable data structures.
• Use global variables to modify the array
• Pass the array by value

Open Ended

If you were storing potion recipes, would a 1D or 2D array be better? Why?