03 - Collective Datatypes
10 Questions
| Attempts: 189
Quiz for session on Groovy simple and collective data types. Abc
Questions and Answers
- 1.A Groovy List variable has a default implementation from the concrete LinkedList class..
- A.
True
- B.
False
- 2.Consider the Groovy code: Map m = [:] m.c=3 m.b=2 m.a=1 What is true about the map's key set:
- A.
Its order is 'a', 'b', 'c'
- B.
Its order is 'c', 'b', 'a'
- C.
Its order cannot be determined
- 3.A new map entry can created by assigning a new "subscript" value within the map, e.g. m["d"] = 4.
- A.
True
- B.
False
- 4.A map value can only be referenced by dot notation, e.g. m.d
- A.
True
- B.
False
- 5.Groovy enhances the Date class so you can say:Date today = new Date()Date tomorrow = ++today
- A.
True
- B.
False
- 6.A list variable can be tested for its true/false value based on whether all of its elements are null.
- A.
True
- B.
False
- 7.A map literal implicitly treats its keys as _____ values.
- 8.A map used in the context of a POGO constructor does not require square bracket delimiters.
- A.
True
- B.
False
- 9.A range variable (not literal) can be used as a case label within a switch statement.
- A.
True
- B.
False
- 10.The map method 'get()' with (pick the correct number) x parameters can potentially add a new key/value to the map.
- A.
1
- B.
2
- C.
3
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