Unit 5 CSP

Question 1

Event-driven programs

Answer 1

written to respond to specified events by executing a block of code or function

Question 2

Will everything in an event driving program always execute?

Answer 2

No!

Some portions of the code will never execute

Question 3

Can the order of an event driven program be known ahead of time?

Answer 3

No

Because it relies on an event to happen. Each time depending on the user something new can happen

Question 4

Do even driven programs implement algorithms?

Answer 4

Yes

Question 5

Element IDs

Answer 5

• IDs should be meaningful and descriptive

- allow a programmer to reference interface elements within their code

Question 6

What must any element that is triggered by onEvent have?

Answer 6

unique ID

Question 7

Can two or more onEvent calls reference the same ID?

Answer 7

Yes

Question 8

Does an element ID always need an unique event handler associated with it?

Answer 8

No

Question 9

What are two actions a programmer could take when debugging code?

Answer 9

• display the value of variables at various points during the program
• ask a friend or collaborator to look over the code segment to see if they are able to find any errors

Question 10

Global variable

Answer 10

Defined outside of a function and can be used anywhere in code

Question 11

Local variable

Answer 11

Defined inside of a function and can only be used in that function