AppLab

What do we use to identify and modify screen elements or widgets?

• onEvent

• dropdowns

• properties

• buttons

What will happen when this code is run?

• 'that's great' will appear in the console log

• 'that's great' will appear on the screen

• 'try again' will appear in the console log

• 'try again' will appear on the screen

Which programming language does AppLab use?

• Java

• Python

• JavaScript

• C++

Two rules for naming elements or components of your app:

• Start with a capital letter

• Use a widget identifier such as btn or scr to help you know which element does what

• Always leave a space between words

• Use camel case for multiple words

Logic errors are ......

(2 answers)

• When the computer returns an error message of some kind that is a clue about what it can't understand

• When the program runs but doesn't do what you think it should

• Situations where no error message is displayed, the output is either not what you expect or nothing happens

• things misspelled or written in such a way the computer doesn't understand what you're trying to say

A variable ............

3 answers

• starts with a lower case letter

• can change during the running of the program

• is a container for storing a value

• is fixed for the duration of the program

A syntax error

2 answers

• is an error in the coding language which prevents the program from running

• could be caused by misspelling the name of a variable or element

• could be caused by using the wrong operator to calculate an answer

• could be caused by entering incorrect data into a variable

What would be the outcome of this program?

• A square

• A straight line

• A triangle

• A circle

What would this program produce?

• A square

• A triangle

• A hexagon

• A circle

This code was set up to add 1 point to score every time a widget called 'hitGold' was clicked. What is missing from line 4?

• score = 1

• score = +1

• score = score + 1

• score + 1