In the implementation of the AbstractDict class, which four methods have the same implementation for all dictionaries?
A. keys, values, __add__, __eq__
B. entries, values, __init__, __str__
C. keys, values, entries, get
D. get, __add__, keys, __init__
Answer: C
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Correct statements of similarities and differences between calling user defined functions and library functions are:
a. Similarity: A call to either requires the function name followed by parenthesized comma separated list of arguments that match the prototype in number and type.
b. Difference: Library functions require inclusion of header files for declarations but user defined functions do not require any declaration before use.
c. Similarity: Either library or user defined functions may be value returning or void functions.
d. Difference: Library functions all provide a return value, user functions must be void functions.
e. Difference Library function declarations (sometimes definitions) come from #include
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