General Data Structures A-Level

Which of the following statements about arrays are true?

Is an array a variable or a data structure?

Items held in arrays are indexed. What is meant by this statement?

Consider the following array: names = [“Dave”, “Mary”, “Sam”, “Billie”, “Julie”]. What would be the value of names[3]?

What is a two dimensional array?

Consider the following array: letters = [ [“D”, “M”, “S”] , [“B”, “J”] ]. What would be the value of letters[0][1]?

How can an array be visualised?

How can a 2D array be visualised?

array = [ [2,4,3], [5,7,6], [8,9,1] ]. What is found at array[2][2]

Are arrays and lists the same?