Data Structures GPYC Practice Questions (Page 8)

Questions 36–37

1. 36application · medium

   A developer needs to create a dictionary that maps configuration keys to values. The keys must be immutable and the dictionary will be used for lookups. Which of the following can be used as a dictionary key?

   • AA dictionary, e.g., {'host': 'localhost'}
   • BA tuple containing strings and integers, e.g., ('host', 8080)
   • CA list of strings, e.g., ['host', 'port']
   • DA set, e.g., {'host', 'port'}
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2. 37application · medium

   A developer has a tuple 'coordinates' containing (x, y, z) values. The developer needs to assign each value to a separate variable. Which code snippet correctly unpacks the tuple?

   • Ax, y, z = coordinates
   • Bx, y = coordinates
   • Cx, y, z = list(coordinates)
   • Dx = coordinates[0]; y = coordinates[1]; z = coordinates[2]
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