ENGR 102 Exam 2 Questions and Answers Graded A+

ENGR 102 Exam 2 Questions and
Answers Graded A+

File I/O - Correct answer-<fileID> = open("<File Name>", "<designator>")

File I/O: what is the designator for? - Correct answer-Designator is either "r" for

reading or "w" for writing to a file

Part 1) Functions available after successfully opening a file - Correct answer-to

read a line from a file that is open for reading: readline( ).




*Syntax for readline( ) function:

<string variable> = <fileID>.readline()




This returns a string from where the file pointer is at the beginning of the call until

a newline character is found.

Part 2) Functions available after successfully opening a file - Correct answer-If we

successfully open a file for writing,


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, then we can use the following function syntax to write a string to a file:




<fileID>.write(<string to write>)

%10.5f or %d to format specifiers to take care of the numbers

Modules - Correct answer-Common Modules:




import matplotlib.pyplot as plt

import numpy as np

import math

Calling Functions - Correct answer-<function>(<arguments>)

ex: print( ), sqrt( ), etc




Dot Format for file I/O

A.<function>(<arguments>)




The name before the dot is an object of a particular type


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