pxt-calliope/docs/reference/js/lessons/headbands/quiz.md

# headbands quiz

create a charades game with a collection of strings #offset #screen  #variables #docs

## Name

## Directions

Use this activity document to guide your work in the [headbands tutorial](/microbit/lessons/headbands/tutorial).

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?

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## 2. Write the line of code that will display the string "puppy" using "data->coll".

```blocks
let coll = (<string[]>[])
coll.push("puppy")
coll.push("clock")
```

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## 3. Write the line of code that will display the string "cat" using `"data->coll".

```blocks
let coll = (<string[]>[])
coll.push("puppy")
coll.push("clock")
coll.push("cat")
```

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## 4. Write the five (5) lines of code that will add the following five words to `data->coll`: puppy, clock, night, cat, cow.

```
let coll = (<string[]>[])
```

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## 5. Write the code to get a string from the collection at a random position.

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