Computer science MCQ questions Class 12 Python

SECTION-A

1. When reading a file line by line, the exact contents can be printed by:

(A) Using readline ( ) (B) Using readlines ( )

2. Choose the correct Python expression for the following mathematical expressions p+q/(r+s)4

(A) p+q / math.pow ((r+s), 4) (B) p+q/(r+s)^4

3. Identify the correct statement for opening text file data.txt in total folder of c:drive in read mode.

(A) F = open (“c:\\total\\data.txt”, “r”) (B) F = open (“c:\total\data.txt”, r)

4. A valid combination of atoms and operators forms a Python

(A) Statement (B) Expression

5. The default file open mode in Python is

(A) Write (B) Read

6. In Python, a block is executed in an ....................

(A) Function (B) Module

7. Consider the following code that reads a number and print its half, if it is an even number. If the

number is odd, the next number is printed.

n = int (input (‘‘Enter a number :’’))

if n % 2 = = 0 :

print (‘‘The given number is even’’)

print (‘‘The half of the number is ‘‘, n/2)

else

print (‘‘The number is odd’’)

print (‘‘The next number is’’, n + 1)

Identify the statement with error in the above code.

(A) int (input (‘‘Enter a number :’’)) (B) if (n % 2 = = 0) :

8. To execute two related operations as pair python provides:

(A) Dot notation (B) with statement

9. Which of the following string function is used to convert first character of string to capital letter?

(A) capitalize() (B) upper()

10. Which of the following mode should be used to:

(i) Create a file if it doesn’t exist.

(ii) Existing file is not overwritten.

(iii) Both reading and writing can be done.

Select your option so that all the above given criteria are met.

(A) r (B) a+

11. What is the truth value associated with None in Python ?

(A) True (B) False

12. _name_ contains:

(A) name of the Python programs

(B) name of the module

(D) name of the variables

13. To write an object on to a binary file use:

(A) load() (B) write()

14. A non fruitful function returns:

(A) 0 (B) Null

15. ‘*’ operator can take which of the following set of values as operands ?

(I) 52, 36 (II) 52, ‘‘36’’

(III)‘‘52’’, 36 (IV)‘‘52’’, ‘‘36’’

(A) I (B) I, II & III

16. ....................... is a character that separates words or phrases in a line or record.

(A) comma (B) tab

17. The command print (str1) give output as Hello!

How are you ?

And the command len (str1) gives output— 19.

Comment on the method of string initialization.

(A) str1 is a multiline string created with triple quotes.

(B) str1 is a multiline string created with a backslash.

(D) str1 is printed in such a way that it gives multiline output.

18. Python module that provides methods for file processing operations like renaming and deleting

file:

(A) pickle module (B) file module

19. Symbols that are used in programming languages to organize sentence structures, and indicate the

rhythm and emphasis of expressions, statements and program structure.

(A) Tokens (B) Punctuators

20. For every name reference within a program, Python follows a name resolution rule called

(A) LEGB (B) LGEB

21. Non-void functions:

(A) Return some value (B) Return void

22. sys.stdout.write( ) is used to write to :

(A) A file named sys.stdout (B) Monitor

23. Variables defined in ‘main’ program are called

(A) Mains (B) Global variables

24. Each line of text in a text file is terminated by ...................... .

(A) ‘\n’ (B) Carriage return

25. After -, no tasks can be performed on that file through the file object.

(A) close () (B) read ()

SECTION-B

26. Predict the output of code segment given below:

when x = –1, y = –25, z = 80

x = int (input (“Enter a number”))

y = int (input (“enter another number”))

z = int (input (“Enter yet another number”))

if x < y < z :

print (“Class A”),

elif x > y > z :

print (“Class B”),

else :

print (“Class C’’),

print (“is what you get”)

(A) Class A is what you get (B) Class B is what you get

27. Which of the following cannot be the output of random . randint (3, 10)

(A) 3 (B) 10

28. Predict the output

if 5 :

print (“smart enough”)

else :

print (“You have to be quick”)

(A) smart enough (B) smart enough

you have to be quick

29. Identify the output of following expression

4*3+5-7//3+6*2–1

(A) 27 (B) 28

30. A file greetings.txt contains a word “GOOD”. What will be the contents of the file after execution

of the following code?

fh=open(“greetings.txt”, “w”)

fh.write(“Bye“)

fh.close()

(A) Good Bye (B) GOOD BYE

31. a = input (‘‘ Enter any number ’’)

b = input (‘‘ Enter any number ”)

c = a + b

print (c)

Predict the output of the above code if input is 56 & 72

(A) 128 (B) 5672

32. Consider the following logical expression (7 > 5) or (50 < 100/0).

What will this expression evaluate to ?

(A) Gives an error (B) False

33. What will be the output of the following code fragment ?

out = file (“Hello. txt”, “w”)

out.write (“Hello, world /n”)

out.write (“What are you doing ?”)

out.close

file (“Hello. txt”). read ( )

(A) Hello, world (B) Hello, world/n

34. Predict the output

for a in range (5) :

print(a)

(A) 0 (B) 0, 1, 2, 3, 4

35. What is the output of the following code ?

fh.file (“Hello txt”, “r”)

size = len (fh. read ( ))

print (fh. read (25))

(A) First 25 bytes of the file (B) No output

36. Identify the output of following code.

x = 1998

if x % 4 == 0 :

print (“Leap year”)

else :

print (“Not leap year”)

(A) Leap year (B) Not leap year

37. What is the most probable output of randint(3, 10)?

(A) 3.045 (B) 4.789

38. What would be the output of the following lines of code?

with open (“input.txt“, ‘w’) as f:

f.write (‘Hello! Everyone‘)

(A) Syntax error

(B) File will be opened for writing, manipulated and then closed

(D) None of these.

39. Find the output of the following code fragment

b = 7

while (b > 0):

print (“Yes”)

b = b – 3

else:

print (“Got to go”)

(A) Yes Yes Yes (B) Yes

Yes

Got to go Yes

Got to go

40. str1 = “Be Good Do Good”

print(str1[10: –12: –1])

What will be the output of the above code?

(A) Syntax error (B) Nothing will be shown

41. Consider the code:

def minus (total, decrement) statement 1

output=total-decrement statement 2

return output statement 3

There is an error in:

(A) statement 1 (B) statement 2

42. What would be the output of the given code?

a = “Wow”

b = 5

c = 15

d = “29”

print(str(b)+str(c)+d+a)

(A) Syntax error (B) 20 29 wow

43. Predict the output of the following lines of code:

import os

fh=open(“Game.txt“)

fh.read(50)

os.remove(“Game.txt”)

fh.close()

(A) Error (B) After reading the file it would be deleted

44. What will be the output of the following Python code?

i=0

def change(i):

i=i+1

return i

change(1)

print(i)

(A) 1 (B) Nothing is displayed

45. Is the following Python code valid?

>>> a=(1,2,3)

>>> b=a.update(4,)

(A) Yes, a=(1,2,3,4) and b=(1,2,3,4)

(B) Yes, a=(1,2,3) and b=(1,2,3,4)

(D) No because wrong syntax for update() method

46. Consider a file “firts.txt” with following contents:

This is our first line.

This is our first file.

Thisis our first example.

This is our first exam.

Now read the below given code and tell us its output.

fh=open(“first.txt”)

fh.seek(–5,2)

str=fh.read( )

print(str)

(A) This (B) Exam

47. Consider the file “Hello.txt” containing the following data:

“This is the time of the year when the whole world around you is painted with colours of ....”

What would be the contents of the file after execution of the following lines of code?

fh = open (“Hello.txt”, “a”)

text = [“It seems everynook”, “end corners has been painted.”]

fh.writelines(text)

fh.flush( )

fh.close( )

(A) Nothing will be changed

(B) Contents of ‘text’ will be added to the beginning of file

(D) Elements of ‘text’ will be added after already existing contents.

48. What will be the output of the following Python code?

myList = [1, 2, 3, 4, 5, 6]

for i in range(1, 6):

myList[i - 1] = myList[i]

for i in range(0, 6):

print(myList[i], end = “ “)

(A) 2 3 4 5 6 1 (B) 6 1 2 3 4 5

49. What will be the output of the following Python code?

def foo(x):

x[0] = [‘def’]

x[1] = [‘abc’]

return id(x)

q = [‘abc’, ‘def’]

print(id(q) == foo(q))

(A) True (B) False

SECTION-C

CASE STUDY BASED QUESTIONS

This section consists of 6 Questions (50-55) Attempt any 5 questions.

Manjeet wrote a program to print Fibonacci series until ‘n’ value using while loop and value of n

entered by user. Help him to complete code for successfully run.

n = _____ (input(“Enter the value of ‘n’: “)) # Statement 1

a = 0

b = 1

sum = ____ # Statement 2

count = 1

_____ (“Fibonacci Series: “, end = “ “) # Statement 3

while(count ___ n): # Statement 4

print( ____ , end = “ “) # Statement 5

count += 1

a = b

b = sum

sum = _______ # Statement 6

50. Choose the correct option to fill up the blank in line marked as Statement 1.

(A) float (B) string

51. Choose the correct option to fill up the blank in line marked as Statement 2.

(A) 1 (B) 0

52. Choose the correct option to fill up the blank in line marked as Statement 3.

(A) int (B) print

53. Choose the correct option to fill up the blank in line marked as Statement 4.

(A) != (B) >=

54. Choose the correct option to fill up the blank in line marked as Statement 5.

(A) sum (B) count

55. Choose the correct option to fill up the blank in line marked as Statement 6.

(A) a–b (B) b–a

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