Practice More Questions From: Homework 3
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What do the following codes compute?
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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?
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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?
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Does the App Inventor provide code blocks to compute the square root of the absolute value of a number?
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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?
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In the designer view of the App Inventor, can a component in the User Interface section of the Palette be a Non-visible component?
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What do the following codes do?
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What value do the following codes yield?
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When trying to attach the 2.1 number code block to the places socket of the format … code block, what will happen?
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What do the following codes do?
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What do the following codes do?
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What do the following codes do?
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Will the following two event handlers always do the same action when they are executed?
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What do the following codes do?
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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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