IT 117: Intermediate Scripting

IT 117: Intermediate Scripting
Quiz 3 Answers

Can the key in a dictionary entry be any data type?

no. you can only use values that are immutable, that cannot be changed

Can the value in a dictionary entry be any data type?
```
yes
```
What string value does Python think of as False in an if statement?
```
the empty string
```
What string value does Python think of as True in an if statement?
```
anything that is not the empty string
```
What integer value does Python think of as True in an if statement?
```
anything other than 0
```
Can a value appear more than once in a set?
```
no
```

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}
```
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()
```