Question

1.arrayList[9] accesses the 10th object of an array of length 10

true

false

2. Arrays are the only data structure that can be accessed with [ ]; for example: orderedData[0]

true

false

3. In a maximum of three steps: how do you swap the contents between two variables of the same type? Pick the absolute best answer

A temp = x; x = y; y = temp

B x = x + y; y = x - y; x = x + y

C x = x + y; y = x - y; x = x - y

4. Placing a [-1] makes the array access its data in reverse

true

false

Answer 1

1.arrayList[9] accesses the 10th object of an array of length 10

true

since the array of zise n,the array indices starts from 0 to n-1

2. Arrays are the only data structure that can be accessed with [ ]; for example: orderedData[0]

true

we use this kind of notationn for array data structure

3. In a maximum of three steps: how do you swap the contents between two variables of the same type? Pick the absolute best answer

A temp = x; x = y; y = temp

Suppose we have two values x and y , and we need to swap them.So, first take a temporary variable temp. Store the value of x in temp.and then store the y value in x and finally the temp value in x. This will swap the contents of two varaibles

4. Placing a [-1] makes the array access its data in reverse

true

we can access the last element when we use a[-1]