10.2 Arrays Cambridge iAS 9618 - Copy

What does the index of an array represent?

• The position of an element within the array.

• The size of the array.

• The data type of the array.

• The number of elements in the array.

Which of the following terms refers to the highest possible index in an array?

• Upper bound

• Lower bound

• Index

• Element

In a 1D array, what does the lower bound represent?

• The index of the first element.

• The index of the last element.

• The size of the array.

• The number of elements in the array.

Which of the following is NOT a feature of arrays?

• Arrays store data of different types in the same array.

• Arrays store data of the same type.

• Arrays have a fixed size.

• Arrays use an index to access elements.

Which of the following is a typical use case for a 2D array?

• Storing data in a grid-like format, such as a matrix.

• Storing a single list of numbers.

• Storing a set of unrelated values.

• Storing data of different types under one identifier.

How would you declare a 1D array of 5 integers in pseudocode?

• ARRAY integers[5]

• ARRAY integers[5] INTEGER

• ARRAY [1,2,3,4,5]

• ARRAY 5 INTEGER

Which of the following is the correct way to declare a 2D array of 3 rows and 4 columns?

• ARRAY matrix[3][4]

• ARRAY matrix[3,4]

• ARRAY matrix[4][3]

• ARRAY 2D matrix

Which pseudocode snippet will access the element at the second row and third column of a 2D array named 'matrix'?

• matrix[2][3]

• matrix[1][2]

• matrix(2,3)

• matrix[3,2]

In pseudocode, which of the following is used to iterate over an array?

• FOR i = 1 TO n

• FOR EACH array

• WHILE i < n

• REPEAT UNTIL i = n

Which pseudocode snippet represents a bubble sort algorithm?

• FOR i = 1 TO n-1 FOR j = 0 TO n-i-1 IF array[j] > array[j+1] THEN swap array[j] and array[j+1]

• FOR i = 1 TO n FOR j = 1 TO n-1 IF array[i] > array[j] THEN swap array[i] and array[j]

• FOR i = 1 TO n-1 FOR j = 1 TO n-1 IF array[i] < array[j] THEN swap array[i] and array[j]

• FOR i = 1 TO n-1 FOR j = 0 TO n-1 IF array[j] == array[i] THEN swap array[i] and array[j]