Quiz - Cracking Codes

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Username *

Enter your Coding Club username

What is Morse Code? *

10 points

A tactile writing system used by people who are visually impaired.

A method used in communication to encode text characters as sequences of two different signal lengths, called dots and dashes.

A programming language.

A code block in Scratch.

In Scratch what is a list? *

10 points

The list of steps you need to do to login.

The list of code blocks in a toolbox.

A list (also called an array) is a tool that can be used to store multiple pieces of information at once.

A list is the step by step instructions of a lesson.

What does this block do? *

10 points

Adds the item "Dara O'Neill" to the top scores list.

Combines the text "Dara O'Neill" and "top scores".

Removes the item "Dara O'Neill" from the top scores list.

Creates a new list called "top scores".

What does this block do? *

10 points

Joins the words "apple" and "banana" together

Makes an apple and banana mixture

Adds up the amount of apples and bananas

Replaces the text "apple" with the text "banana"

What does this block do? *

10 points

Adds 2 to 5

Picks a random number between 1 and 5

Picks a random number between 2 and 5

Picks a random number which can either be 2, 3 or 4

How many possible combinations can "secret code" be? *

Tip: take your time with this question and write out all the combinations. You are joining two numbers together.

10 points

4 combinations - 11, 12, 21, 22

2 combinations - 12, 12

12 combinations - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

2 combinations - 11, 22

When you use an "ask and wait" block in Scratch, where is the answer stored? *

10 points

In a variable you create called "answer".

It is not stored anywhere, you need to remember it.

In the "answer" block that's in the Sensing toolbox.

In the "username" block that's in the Sensing toolbox.

Why is a Pigpen Code called a "Pigpen" code? *

10 points

It was invented by Mary Pigpen

You need a special pigpen to write the answers

Each letter is represented by the part of the 'pigpen' that surrounds it

What letter does this pigpen code mean? *

Tip: use the Pigpen Code image in the previous question to work it out.

10 points

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