1)For a given set s, which method returns True if item is in s, or False otherwise.   a. s.__iter__(item)   b. s.__contains__(item)   c. s = set()   d. S1.__sub__(s2) 2)In AbstractSet class, which method returns the union of two sets?   a. __union__   b. __and__   c. __sub__   d. __or__

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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1)For a given set s, which method returns True if item is in s, or False otherwise.

  a.
s.__iter__(item)
  b.
s.__contains__(item)
  c.
s = set()
  d.
S1.__sub__(s2)

2)In AbstractSet class, which method returns the union of two sets?

  a.

__union__

  b.

__and__

  c.

__sub__

  d.

__or__

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