IT 117: Intermediate Scripting - Answers to Class 8 Ungraded Quiz

IT 117: Intermediate to Scripting
Answers to Class 8 Ungraded Quiz

Can a value appear more than once in a set?
```
no
```
What does it mean for a set B to be a subset of set A?
```
all the values in B are contained in 
```

What is the union of the sets A and B?

a new set consisting of all the elements in A and all the elements in B

If we have the sets A and B with the elements below, what are the elements formed by the union of A and B?
```
A = {1, 2, 3}
B = {3, 4, 5}
```
```
{1, 2, 3, 4, 5}
```
If we have the sets A and B with the elements below, what are the elements formed by the intersection of A and B?
```
A = {1, 2, 3}
B = {3, 4, 5}
```
```
{3}
```
Write the Python statement to create an empty set named s1.
```
s1 = set()
```
Write a Python statement to create the set s2 containing the values 1, 2 and 3, using a set literal.
```
s2 = {1, 2, 3}
```
If the variable s1 pointed to an empty set, what would you see if you printed this variable?
```
set()
```
Name the two set methods that can be used to add elements to a set.
```
add() and update()
```
Name the two set methods that can be used to remove an element from a set.
```
discard() and remove()
```