Python Quiz-6

Which of the following command is used to open a file “c:\temp.txt” in read-mode only?

• infile = open(“c:\temp.txt”, “r”)

• infile = open(“c:\\temp.txt”, “r”)

• infile = open(file = “c:\temp.txt”, “r+”)

• infile = open(file = “c:\\temp.txt”, “r+”)

Which of the following commands can be used to read “n” number of characters from a file using the file object <file>?

• file.read(n)
  

• n = file.read()

• file.readline(n)

• file.readlines()

Which of the following commands can be used to read the next line in a file using the file object <tmpfile>?

• tmpfile.read(n)

• tmpfile.read()

• tmpfile.readline()

• tmpfile.readlines()

Which of these about a dictionary is false?

• The values of a dictionary can be accessed using keys

• The keys of a dictionary can be accessed using values

• Dictionaries aren’t ordered

• Dictionaries are mutable

What is the output of the following code?

a={1:5,2:3,3:4}

a.pop(3)

print(a)

• {1: 5}

• {1: 5, 2: 3}

• Error, syntax error for pop() method

• {1: 5, 3: 4}