CSE 102 Exam 3 Practice

Front

What is the correct way to open a file for reading in Python? (Assume there is a variable filename that contains the filename)

Back

with open(filename, 'r') as openFile:

Front

What is the correct syntax to define a user-defined function in Python? Options: function myFunction():, def myFunction():, create myFunction():, define myFunction():

Back

def myFunction():

Front

Which of the following is a valid way to create a dictionary in Python? Options: my_dict = {1, 2}, my_dict = [1: 'a', 2: 'b'], my_dict = {'a': 1, 'b': 2}, my_dict = {'a' =1, 'b' = 2}

Back

my_dict = {'a': 1, 'b': 2}

Front

Which function can be used to skip (and if desired gather) a row in a csv file? Options: next(), skip(), pass(), read()

Back

next()

Front

How do you read all lines from a text file into a list in Python?

Back

file.readlines()

Front

What is the correct way to update a value in a dictionary?

Back

Front

What is the difference between parameters and arguments?

Back

Parameters are the placeholders in the function definition and arguments are the values passed to the function when it is called.

Front

What is the output of the code snippet? Options: {'a': 1, 'b': 2}, {'a': 1, 'b': 2, 'c': 3}, {'c': 3}, An error will occur

Back

{'a': 1, 'b': 2, 'c': 3}

Front

How do you remove a key-value pair from a dictionary?

Back

del my_dict[key]

Front

What is the output of the code snippet? Options: [1, 2, 3], [5, 2, 3], None, Error for an undefined variable

Back

[5, 2, 3]