Homework 3
Graded Quiz • 30 min Quiz15 Questions Week 3
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Homework 3

Graded Quiz • 30 min Quiz15 Questions Week 3
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15 Questions Week 3
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10 Questions Week 3

Q:

What do the following codes compute?

Q:

Suppose you can use only copies of the subtraction code block below and four Number code blocks of the numbers 1, 2, 3 and 5. To compute ((5 – 3) – 2) – 1 in that case, how many copies of the subtraction code block is needed?

Q:

What is the smallest number of code blocks (including the number blocks) needed to compute 5+3+2+1 using any Math code blocks and four operands?

Q:

Does the App Inventor provide code blocks to compute the square root of the absolute value of a number?

Q:

Which method of the Notifier component is used to display a temporary alert or notification on the application screen that will disappear after a short time?

Q:

In the designer view of the App Inventor, can a component in the User Interface section of the Palette be a Non-visible component?

Q:

What do the following codes do?

Q:

What value do the following codes yield?

Q:

When trying to attach the 2.1 number code block to the places socket of the format … code block, what will happen?

Q:

What do the following codes do?

Q:

What do the following codes do?

Q:

What do the following codes do?

Q:

What do the following codes do?

Q:

Will the following two event handlers always do the same action when they are executed?

Q:

In using the Notifier component to display a temporary alert or notification on the application screen that will disappear after some time, what property of the component is used to control the duration of the alert?

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