Answered: Study the following two Python code…

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

Section: Chapter Questions

Problem 1PE

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Question

Study the following two Python code fragments:

Version 1

d = {}
result = False
for x in mylist:
if x in d:
result=True
break
d[x] = True

Version 2

d = {}
result = False
for x in mylist:
if not x in d:
d[x]=True
continue
result = True

Both versions should determine if there is any element that appears more than once in the list mylist. If there is such an element than the variable result should be True, otherwise it should be False. For instance, if mylist=[1,2,2,3,4,5] the result variable should be True.

Which of the following statements is True for any value of the list mylist after the execution of both versions of code?

Neither Version 1 or Version 2 are computing the value of the result variable correctly.
Version 2 is not computing the result variable correctly.
Both the result and d variables have the same value.
The value of the result variable is the same, but the variable d is different.

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