pxt-calliope/docs/lessons/headbands/quiz-answers.md

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# headbands quiz answers
create a charades game with a collection of strings #offset #screen #variables #docs
## Name
## Directions
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Use this activity document to guide your work in the [headbands tutorial](/microbit/lessons/headbands/activity).
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Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. What is the meaning of the term 'collection' in programming? What is a 'collection' of strings?
<br/>
A 'collection' is a group of variables of the same type stored together. A 'collection' of strings is a group of strings stored together.
## 2. Consider the following lines of code.
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```blocks
let coll = (<string[]>[])
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coll.push("puppy")
coll.push("clock")
```
Write the line of code that will display the string "puppy" using `data->coll`.
<br/>
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```blocks
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basic.showString(coll[0], 150)
```
## 3. Consider the following lines of code.
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```blocks
let coll = (<string[]>[])
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coll.push("puppy")
coll.push("clock")
coll.push("cat")
```
Write the line of code that will display the string "cat" using `data->coll`.
<br/>
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```blocks
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basic.showString(coll[2], 150)
```
## 4. Consider the following line of code.
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```blocks
let coll = (<string[]>[])
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```
Write the five (5) lines of code that will add the following five words to `data->coll`: puppy, clock, night, cat, cow.
<br/>
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```blocks
let coll.push("puppy")
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coll.push("clock")
coll.push("night")
coll.push("cat")
coll.push("cow")
```
## 5. Write the code to get a string from the collection at a random position.
<br/>
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```blocks
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let index = Math.random(coll.length)
let word = coll[index]
```