12 Coding and algorithms
Interactive practice questions
The list of numbers 4, 9, 8, 1, 6 is to be sorted using the selection sort algorithm.
a
Enter the output after each line of the selection sort algorithm.
| Step Number | Algorithm Step | OUTPUT |
|---|---|---|
| $1$1 | Find the smallest number. Swap it with the first number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $2$2 | Find the second-smallest number. Swap it with the second number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $3$3 | Find the third-smallest number. Swap it with the third number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $4$4 | Find the fourth-smallest number. Swap it with the fourth number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
b
A bug is an error in the algorithm which results in the algorithm not producing the desired output.
The algorithm below contains a bug. What is the output of each line of the algorithm?
| Step Number | Algorithm Step | OUTPUT |
|---|---|---|
| $1$1 | Find the smallest number. Swap it with the first number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $2$2 | Find the second-smallest number. Swap it with the first number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $3$3 | Find the third-smallest number. Swap it with the third number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
| $4$4 | Find the fourth-smallest number. Swap it with the fourth number. |
$\editable{},\editable{},\editable{},\editable{},\editable{}$,,,, |
c
Which step contains the bug?
Step 1
A
Step 3
B
Step 4
C
Step 2
D
Easy
4min
The list of numbers 5, 9, 7, 1, 6 is to be sorted using the selection sort algorithm.
Easy
3min
The list of numbers 4, 9, 8, 1, 7 is to be sorted using the insertion sort algorithm.
Easy
4min
The list of numbers 3, 8, 5, 2, 4 is to be sorted using the insertion sort algorithm.
Easy
2min
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