PYTHON QUIZ2

1. Which of the following is correct with respect to the python code d = {"a":3,"b":7}?

• Dictionary d is created.

• a and b are the keys of dictionary d.

• 3 and 7 are the values of dictionary d

• All of the above.

2. What will be the output of the Python code?

d1={"abc":5,"def":6,"ghi":7}

print(d1[0])

• abc

• 5

• {“abc”:5}

• Error

3. What will be the output of the following Python code snippet?

>>> d = {"john":40, "peter":45}

>>> d["john"]

• 40

• 45

• “john”

• “peter”

4. Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use?

• d.size()

• len(d)

• size(d)

• d.len()

5. What will be the output of the following Python code snippet?

a = {i: i * i for i in range(6)}

print (a)

• Dictionary comprehension doesn’t exist

• {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6:36}

• {0: 0, 1: 1, 4: 4, 9: 9, 16: 16, 25: 25}

• { 0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25}

6. To read two characters from a file object infile, we use ________.

• infile.read(2)

• infile.read()

• infile.readline()

• infile.readlines()

7. 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+”)

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

• file.readlines()

• n = file.read()

• file.read(n)

• file.readline(n)

9. What is the last action that must be performed on a file?

• Close

• Save

• End

• Write

10. Which of the following is not a method of opening files?

• Read

• Append

• Write

• Replace