Lists

Sample questions

Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.

Section A · multiple choice

1. 1.

   Lists in Python are:

   1. limited to numbers
   2. always sorted
   3. immutable like strings
   4. mutable: items can be changed in place

   Answer

   (d) mutable: items can be changed in place

2. 2.

   What does this program print? L = [58, 39, 40, 36, 27, 51] print(L[-2:-1])

   1. [36]
   2. []
   3. [51, 27, 36, 40, 39, 58]
   4. [27]

   Answer

   (d) [27]

   start is included, stop is not; a negative index counts from the end

3. 3.

   What does this program print? L = [4, 10, 19] print(L.append(34))

   1. None
   2. 34
   3. Error
   4. [4, 10, 19, 34]

   Answer

   (a) None

   append() changes the list and gives back None

Section B · short answer

1. 4.

   What is the difference between append() and extend()?

   Answer

   append() adds its argument as one item (even a whole list); extend() adds each item of the given list.

2. 5.

   What does this program print? Give (a) the first line (b) the second. L = [17, 45, 32, 30, 33, 50, 53] print(L[4:7:2]) print(L[3:6])

   Answer

   (a) [33, 53]; (b) [30, 33, 50]

   start is included, stop is not

Section C · long answer

1. 6.

   Explain any six list methods with an example of each.

   Answer

   append (adds one item), extend (adds items of a list), insert (adds at a position), remove (first match), pop (removes by index), sort (in place); e.g. [3, 1].sort() makes [1, 3].

Fresh sheets for your child

In the app, every Lists sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.

Coming soon for Android and iPhone.

More Class 11 Computer Science