Computer science MCQ questions Class 12 Python

1. All keywords in Python are in ....................... except three keywords.

(A) lower case (B) UPPER CASE

2. To read the entire remaining contents of the file as a string from a file object infile, we use

....................... .

(A) infile.read(2) (B) infile.read()

3. How many types of error are there in Python?

(A) One (B) Two

4. A byte-stream is converted back into an object hierarchy by the process called:

(A) Pickling (B) dumping

5. Negative byte value in seek() will :

(A) Give an error

(B) Move the pointer to end of file

(D) Move the file pointer to EOF

6. Which of the following is true for variable names in Python?

(A) unlimited length

(B) all private members must have leading and trailing underscores

(D) none of the mentioned

7. Which of these in not a core data type?

(A) Lists (B) Dictionary

8. Constant(s) available in Math module is/are:

(A) math.pi (B) math.e

9. The variable that stores the name of top level statement is:

(A) _name_ (B) _main_

10. Which of the following sequences would be generated in the given line of code?

range (5, 0, -2)

(A) 5 4 3 2 1 0 -1 (B) 5 4 3 2 1 0

11. Which of the following statements are true?

(A) When you open a file for reading, if the file does not exist, an error occurs

(B) When you open a file for writing, if the file does not exist, a new file is created

file

(D) All of the mentioned

12. Sorting means arranging the elements in

(A) ascending order (B) descending order

13. Which function is used to split a line in columns?

(A) split() (B) spt()

14. A sequence of characters surrounded by quotes:

(A) Comment (B) Document string

15. ................. is a file containing variables, class, definitions, statements and functions related to a

particular task.

(A) docstrings (B) functions

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

(A) ‘\n’ (B) Carriage return

17. To read 5 bytes from a file, the statement is

(A) read (5) (B) <filehandle>. read (5)

18. .................... is used to indicate something that has yet not been created.

(A) True (B) False

19. Identify the incorrect form of import statement.

(A) from <module> import <object1> [<object2>, […]]

(B) from <module> import <object>

(D) All of the above

20. Below are given steps to process a file in python. Arrange them in correct order

1. Open a file and assign its reference to a file object.

2. determine the type of file usage.

3. close the file.

4. Process the file

(A) 1 — 2 — 3 — 4 B. 4 — 2 — 3 — 1

21. The ‘w’ mode will:

(A) Create a new file for writing if it doesn’t exist.

(B) Overwrite the file that already exist.

(D) All of the above.

22. Name the standard input/output files opened by Python when a user starts Python.

(A) stdin (B) stdout

23. A file object is also known as

(A) File identifier (B) File mode

24. All the functions on a date file are performed through:

(A) open( ) (B) file object

25. ..................... forces the writing of data on disc still pending in output buffer.

(A) write ( ) (B) writelines ( )

SECTION-B

26. 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

27. What will be the output of the following code, if the file stud.txt contains following data?

10~34.50~67.85~89.0\n

11~47.78~89.95~67.45\n

13~12.53~100.00~56.20\n

fh=open("stud.txt","w")

line=fh.readline().rstrip('\n')

record = line.split('~')

print(record)

(A) ['10','34.50,'67.85','89.0'] (B) [10,11,13]

28. The statement

name = u ‘‘Neelam’’ :

(A) Gives an error (B) declares of a unicode string

29. ....................... refer to use an expression as part of a larger expression.

(A) Functions (B) Compositions

30. int (‘010’, 8) will give

(A) 00000010 (B) 18

31. A file ABC.txt contains the following data

12~47.85~64.25~89\n.

What can you say about the type of the file?

(A) File contains the students data (B) File contains numbers.

32. A multiline string can be created by:

(A) Adding a backslash at the end of the physical line

(B) By enclosing the multiple lines of string in triple quotes.

(D) Both (A) & (B)

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

print ‘doesn/’t’

print “doesn’/’t”

print “yes,” he said.’

print “/”yes, /” he said.”

(A) doesn’t (B) doesn’t

doesn/t doesn’t

“yes”, he said. Most recent traceback error

“yes,” he said “yes,” he said.

doesn’t doesn’t

“yes,” he said. “yes,” he said.

“yes,” he said “yes, / he said.

34. Predict the output of each of the three code fragments.

1. a = 20

a + 1

print (a)

2. a = 20

a + = 1

print(a)

3. a = 20

a = a + 1

print(a)

(A) 1.21 2.21 3.20 (B) 1.20 2.21 3.21

35. What will be the output of print (len (str (5 > 50)))?

(A) Most recent traceback error (B) 4

36. Predict the output

num = 20.5

z = 3

result = z**3 + num//z

print (result)

(A) 3381.4 (B) 0

37. Predict the output of the following expression.

print(4*len('welcome')/((len("python")%3)+2.0))

(A) 14 (B) 27

38. Predict the output of 3 < (10 or 2)

(A) True (B) False

39. What will the following expression evaluate to print (complex (1.5) + int (2.5) + 200)

(A) Syntax Error (B) (203.5 + 0j)

40. What would be the output of print (math. fabs (–5.0/2))

(A) – 2.5 (B) 2.5

41. What will be the output of:

print (int (10.78/3) < len (“10.78”))

(A) True (B) False

42. Find the output of the below given code when x = 0, y = 1, z = 1

x = int (input (“Enter a number”))

y = int (input (“Enter second number”))

z = int (input (“Enter third number”))

if x < y < z :

print (“stream 1”)

elif x > y > z :

print (“stream 2”)

else : print (“stream 3”)

print (“is selected for you”)

(A) stream 3 (B) stream 3 is selected for you

is selected for you

43. Identify the statement which will give output 2.

(A) print(5/2) (B) print(5.0//2)

44. Find the output

b=eval('65+23')

print(b)

(A) 6523 (B) Syntax error

45. Predict the output of the given code for x = 30

if (x > 50) :

if (x < 60) :

print (“Got it”)

else :

print (“Well tried”)

else :

if (x > 30) :

print (“Just missed”)

else :

pritn (“Eureka”)

(A) Got it (B) Well tried

46. What will be the output of following code?

deffunc(a,b=5,c=10):

poly=2*a*2-5*b+c

a=b + c

print(poly)

func(6,c=4)

(A) 5 (B) 4

47. What will the following expression evaluate to :

(2/int (1.5) + 200)

(A) 202 (B) 201

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

def power(x, y=2):

r = 1

for i in range(y):

r = r * x

return r

print(power(3))

print(power(3, 3))

(A) 9 (B) 9

27 9

49. Predict the output

for a in 10, 12, 14, 16, 18 :

print(a)

(A) 10, 12, 14, 16, 18 (B) 10, 14, 16

SECTION-C

CASE STUDY BASED QUESTIONS

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

I. Attempt any 5 questions out of 6.

Module

A Python module can be defined as a python program file which contains a python code including

python functions, classes, or variables. In other words, we can say that our python code file saved

with extension (.py) is treated as the module. We may have a runnable code inside the python

module.

Modules in Python provide us the flexibility to organize the code in a logical way. To use the

functionality of one module into another, we must have to import the specific module.

The import statement is used to import all the functionality of one module into another. Here, we

must notice that we can use the functionality of any python source file by importing that file as

the module into another python source file. We can import multiple modules with a single import

statement, but a module is loaded once regardless of the number of times, it has been imported

into our file.

50. Which extension is used to save the Python file?

(A) .py (B) .pyth

51. What is the use of import statement?

(A) to import all functionality of one module

(B) to import all functionality of one module into another

(D) None of these.

52. .................... is a file containing Python definitions and statements.

(A) Module (B) List

53. How many kinds of module are there in Python?

(A) Built in (B) User defined

54. Which keyword is used to import the module?

(A) import module (B) module

55. Name the Python module used for renaming and deleting files:

(A) pickle module (B) file module

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