• 4 hours
  • Hard

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Last updated on 2/21/22

Implement Communication Between Application Layers

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Evaluated skills

  • Implement Communication Between Application Layers
  • Question 1

    Choose the best type of data storage for data that is neatly structured, with nearly every attribute of most objects having values. [Last name, first name, telephone, address, date of birth]

    • SQL

    • Column family 

    • Document store

  • Question 2

    Given the following JSON data message, which field is likely to be misinterpreted?

    "last_name": "Yeager",
    "first_name": "Neil",
    "telephone": "3125679999",
    "salary": 120000,
    "vacation_days": 8
    • Salary

    • last_name

    • Telephone

    • vacation_days

  • Question 3

    What are the advantages of putting a data layer behind an API? 

    Careful, there are several correct answers.
    • Errors are restricted to a smaller subset of code. 

    • We can ensure rules enforcement. 

    • We aren't required to implement rules enforcement. 

    • We can define mandatory and optional data. 

    • We can query a database.