Question

cs-040: exploring computer science 1 dimitrova 4th / unit 5: what more can i do with basic programming skills? (weeks 9-11) / lesson 8.7.p

1. true or false. it is necessary to use a \forever\ block when running a timer.

○ true
○ false

1. true or false. unless you hide the timer, it will show for users.

○ true
○ false

1. each timer code in the programs started with the \set timer to 0\ code. what is the best possible explanation for this?

○ the \set timer to 0\ code aligns the timer to the scratch clock that runs with the program.
○ the \set timer to 0\ allows you to set the variable to
ull\ which clears the variable and is necessary for the timer to begin the counting process.
○ setting the variable to a specific number gives the timer a starting point to begin counting from.
○ setting the timer signals to the program that it is time to begin running the code.

Explanation:

1. In programming environments like Scratch, timers can be used in one-time sequences (e.g., triggering an action after a set time without looping) so a "forever" block is not required.
2. In tools like Scratch, the timer is a background variable by default and does not display to users unless explicitly set to show.
3. The "set timer to 0" command initializes the timer's starting value, ensuring counting begins from a defined point rather than a leftover or default value.

Answer:

1. False
2. False
3. Setting the variable to a specific number gives the timer a starting point to begin counting from.