What an App Is Made Of: teacher key

How Apps Work, grade 8 edition, written for 8th grade. A client asks a server for a page, and the server sends a response. Learn about status codes, permissions, app review and who must ask a grown-up first.

Read the book. Print this page for the key.

Questions and answers

1. What does a web server send back to a client?
   • A response (answer)
   • A new operating system
   • A privacy label
2. What does a status code of 404 mean?
   • The request worked
   • A file cannot be found (answer)
   • The app was reviewed
3. What does least privilege mean for an Android app?
   • It cannot be updated
   • It runs only at night
   • It can reach only the components it needs (answer)
4. What does the word process mean in the pages?
   • Where an Android app runs by default (answer)
   • A privacy label
   • A kind of subscription
5. What can a parent do when a child asks to get an app on an iPhone?
   • Approve or decline from the parent's own device (answer)
   • Nothing
   • Wait until 2008

Words

• client: asking program
• database: stored information
• process: running program
• phishing: tricking people
• malware: harmful software