Python/Python Mcq Set 9 Sample Test,Sample questions

Question:
 Is the following Python code valid?

>>> a,b=1,2,3

1.Yes, this is an example of tuple unpacking. a=1 and b=2

2.Yes, this is an example of tuple unpacking. a=(1,2) and b=3

3.No, too many values to unpack

4.Yes, this is an example of tuple unpacking. a=1 and b=(2,3)


Question:
 Suppose t = (1, 2, 4, 3), which of the following is incorrect?

1.print(t[3])

2. t[3] = 45

3.print(max(t))

4.print(len(t))


Question:
 What will be the output of the following Python code?

>>> a=("Check")*3
>>> a

1. (‘Check’,’Check’,’Check’)

2.* Operator not valid for tuples

3. (‘CheckCheckCheck’)

4.Syntax error


Question:
 What will be the output of the following Python code?

>>> a=(2,3,1,5)
>>> a.sort()
>>> a

1. (1,2,3,5)

2.(2,3,1,5)

3.None

4.Error, tuple has no attribute sort


Question:
 What will be the output of the following Python code?

>>>t1 = (1, 2, 4, 3)
>>>t2 = (1, 2, 3, 4)
>>>t1 < t2

1. True

2. False

3. Error

4.None


Question:
 What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
B = [[3, 3, 3],
     [4, 4, 4],
     [5, 5, 5]]
zip(A, B)

1.Address of the zip object

2.Address of the matrices A and B

3. No output

4.[3, 6, 9, 16, 20, 24, 35, 40, 45]


Question:
 What will be the output of the following Python code?

l=["good", "oh!", "excellent!", "#450"]
[n for n in l if n.isalpha() or n.isdigit()]

1.[‘good’, ‘oh’, ‘excellent’, ‘450’ ]

2. [‘good’]

3.[‘good’, ‘#450’]

4. [‘oh!’, ‘excellent!’, ‘#450’]


Question:
 What will be the output of the following Python code?

t=32.00
[round((x-32)*5/9) for x in t]

1.[0]

2.0

3. [0.00]

4.Error


Question:
 Which of the following is a Python tuple?

1.[1, 2, 3]

2.(1, 2, 3)

3.{1, 2, 3}

4.{}


Question:
 Write a list comprehension to produce the list: [1, 2, 4, 8, 16……212].

1. [(2**x) for x in range(0, 13)]

2.[(x**2) for x in range(1, 13)]

3.[(2**x) for x in range(1, 13)]

4. [(x**2) for x in range(0, 13)]


Question:
If a=(1,2,3,4), a[1:-1] is ____

1.Error, tuple slicing doesn’t exist

2. [2,3]

3.(2,3,4)

4.(2,3)


Question:
Is the following Python code valid?

>>> a,b,c=1,2,3
>>> a,b,c

1. Yes, [1,2,3] is printed

2. No, invalid syntax

3. Yes, (1,2,3) is printed

4.1 is printed


Question:
Is the following Python code valid?

>>> a=(1,2,3)
>>> b=('A','B','C')
>>> c=tuple(zip(a,b))

1.Yes, c will be ((1, ‘A’), (2, ‘B’), (3, ‘C’))

2.Yes, c will be ((1,2,3),(‘A’,’B’,’C’))

3.No because tuples are immutable

4.No because the syntax for zip function isn’t valid


Question:
Is the following Python code valid?

>>> a=(1,2,3)
>>> b=a.update(4,)

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

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

3.No because tuples are immutable

4.No because wrong syntax for update() method


Question:
Is the following Python code valid?

>>> a=(1,2,3,4)
>>> del a

1.No because tuple is immutable

2. Yes, first element in the tuple is deleted

3. Yes, the entire tuple is deleted

4.No, invalid syntax for del method


Question:
Is the following Python code valid?

>>> a=2,3,4,5
>>> a

1. Yes, 2 is printed

2. Yes, [2,3,4,5] is printed

3.No, too many values to unpack

4.Yes, (2,3,4,5) is printed


Question:
What is the data type of (1)?

1. Tuple

2. Integer

3.List

4.Both tuple and integer


Question:
What is the list comprehension equivalent for: list(map(lambda x:x**-1, [1, 2, 3]))?

1. [1|x for x in [1, 2, 3]]

2.[-1**x for x in [1, 2, 3]]

3. [x**-1 for x in [1, 2, 3]]

4. [x^-1 for x in range(4)]


Question:
What is the list comprehension equivalent for?

{x : x is a whole number less than 20, x is even}    (including zero)

1. [x for x in range(1, 20) if (x%2==0)]

2. [x for x in range(0, 20) if (x//2==0)]

3. [x for x in range(1, 20) if (x//2==0)]

4. [x for x in range(0, 20) if (x%2==0)]


Question:
What type of data is: a=[(1,1),(2,4),(3,9)]?

1. Array of tuples

2.List of tuples

3.Tuples of lists

4.Invalid type


Question:
What will be the output of the following Python code?

>>> a,b=6,7
>>> a,b=b,a
>>> a,b

1. (6,7)

2.Invalid syntax

3. (7,6)

4.Nothing is printed


Question:
What will be the output of the following Python code?

>>> a=(0,1,2,3,4)
>>> b=slice(0,2)
>>> a[b]

1. Invalid syntax for slicing

2. [0,2]

3.(0,1)

4. (0,2)


Question:
What will be the output of the following Python code?

>>> a=(1,2)
>>> b=(3,4)
>>> c=a+b
>>> c

1. (4,6)

2. (1,2,3,4)

3.Error as tuples are immutable

4.None of these


Question:
What will be the output of the following Python code?

>>> a=(1,2,3,4)
>>> del(a[2])

1. Now, a=(1,2,4)

2. Now, a=(1,3,4)

3.Now a=(3,4)

4.Error as tuple is immutable


Question:
What will be the output of the following Python code?

>>> a=(2,3,4)
>>> sum(a,3)

1.Too many arguments for sum() method

2.The method sum() doesn’t exist for tuples

3.12

4. 9


Question:
What will be the output of the following Python code?

>>> a=[(2,4),(1,2),(3,9)]
>>> a.sort()
>>> a

1.[(1, 2), (2, 4), (3, 9)]

2.[(2,4),(1,2),(3,9)]

3.Error because tuples are immutable

4.Error, tuple has no sort attribute


Question:
What will be the output of the following Python code?

>>> import collections
>>> a=collections.namedtuple('a',['i','j'])
>>> obj=a(i=4,j=7)
>>> obj

1. a(i=4, j=7)

2.obj(i=4, j=7)

3.(4,7)

4.An exception is thrown


Question:
What will be the output of the following Python code?

>>>my_tuple = (1, 2, 3, 4)
>>>my_tuple.append( (5, 6, 7) )
>>>print len(my_tuple)

1. 1

2. 2

3. 5

4.Error


Question:
What will be the output of the following Python code?

>>>t = (1, 2)
>>>2 * t

1. (1, 2, 1, 2)

2.[1, 2, 1, 2]

3.(1, 1, 2, 2)

4.[1, 1, 2, 2]


Question:
What will be the output of the following Python code?

>>>t = (1, 2, 4, 3, 8, 9)
>>>[t[i] for i in range(0, len(t), 2)]

1. [2, 3, 9]

2.[1, 2, 4, 3, 8, 9]

3.[1, 4, 8]

4.(1, 4, 8)


Question:
What will be the output of the following Python code?

>>>t=(1,2,4,3)
>>>t[1:-1]

1. (1, 2)

2.(1, 2, 4)

3.(2, 4)

4.(2, 4, 3)


Question:
What will be the output of the following Python code?

>>>t=(1,2,4,3)
>>>t[1:-1]

1. (1, 2)

2.(1, 2, 4)

3.(2, 4)

4.(2, 4, 3)


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
      [4, 5, 6],
      [7, 8, 9]]
[A[row][1] for row in (0, 1, 2)]

1. [7, 8, 9]

2.[4, 5, 6]

3. [2, 5, 8]

4.[1, 4, 7]


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
 
[[col + 10 for col in row] for row in A]

1. [[11, 12, 13], [14, 15, 16], [17, 18, 19]]

2.Error

3.[11, 12, 13], [14, 15, 16], [17, 18, 19]

4. [11, 12, 13, 14, 15, 16, 17, 18, 19]


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
B = [[3, 3, 3],
     [4, 4, 4],
     [5, 5, 5]]
[B[row][col]*A[row][col] for row in range(3) for col in range(3)]

1.[3, 6, 9, 16, 20, 24, 35, 40, 45]

2. Error

3. [0, 30, 60, 120, 160, 200, 300, 350, 400]

4. 0


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
B = [[3, 3, 3],
     [4, 4, 4],
     [5, 5, 5]]
[[col1 * col2 for (col1, col2) in zip(row1, row2)] for (row1, row2) in zip(A, B)]

1. [0, 30, 60, 120, 160, 200, 300, 350, 400]

2.[[3, 6, 9], [16, 20, 24], [35, 40, 45]]

3.No output

4. error


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
[A[i][i] for i in range(len(A))]

1. [1, 5, 9]

2.[3, 5, 7]

3. [4, 5, 6]

4.[2, 5, 8]


Question:
What will be the output of the following Python code?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
[A[i][len(A)-1-i] for i in range(len(A))]

1.[1, 5, 9]

2.[4, 5, 6]

3.[3, 5, 7]

4. [2, 5, 8]


Question:
What will be the output of the following Python code?

d = {"john":40, "peter":45}
d["john"]

1.40

2.45

3.“john”

4.“peter”


Question:
What will be the output of the following Python code?

l=[[1, 2, 3], [4, 5, 6]]
for i in range(len(l)):
	for j in range(len(l[i])):
		l[i][j]+=10
l

1.No output

2. Error

3.[[1, 2, 3], [4, 5, 6]]

4. [[11, 12, 13], [14, 15, 16]]


Question:
What will be the output of the following Python code?

numberGames = {}
numberGames[(1,2,4)] = 8
numberGames[(4,2,1)] = 10
numberGames[(1,2)] = 12
sum = 0
for k in numberGames:
    sum += numberGames[k]
print len(numberGames) + sum

1.30

2. 24

3. 33

4.12


Question:
What will be the output of the following Python code?

r = [11, 12, 13, 14, 15, 16, 17, 18, 19]
A = [[0, 10, 20],
               [30, 40, 50],
               [60, 70, 80]]
for row in A:
	for col in row:
		r.append(col+10)

1. [11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 20, 30, 40, 50, 60, 70, 80, 90]

2. [10, 20, 30, 40, 50, 60, 70, 80, 90]

3.[11, 12, 13, 14, 15, 16, 17, 18, 19]

4. [0, 10, 20, 30, 40, 50, 60, 70, 80]


Question:
What will be the output of the following Python code?

[ord(ch) for ch in 'abc']

1.[97, 98, 99]

2. [‘97’, ‘98’, ‘99’]

3.[65, 66, 67]

4.[65, 66, 67]


Question:
What will be the output of the following Python code?
>>> a=(1,2,(4,5))
>>> b=(1,2,(3,4))
>>> a<b

1.False

2.True

3.Error, < operator is not valid for tuples

4.Error, < operator is valid for tuples but not if there are sub-tuples


Question:
What will be the output of the following Python code?
>>>t=(1,2,4,3)
>>>t[1:3]

1. (1, 2)

2. (1, 2, 4)

3. (2, 4)

4. (2, 4, 3)


Question:
What will be the output of the following Python list comprehension?

[j for i in range(2,8) for j in range(i*2, 50, i)]

1.A list of prime numbers up to 50

2.A list of numbers divisible by 2, up to 50

3. A list of non prime numbers, up to 50

4.error


Question:
Which of the following Python statements will result in the output: 6?

A = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]

1. A[2][3]

2.A[2][1]

3. A[1][2]

4. A[3][2]


Question:
Which of these about a set is not true?

1.Mutable data type

2.Allows duplicate values

3.Data type with unordered values

4.Immutable data type


Question:
Write a list comprehension equivalent for the Python code shown below.

for i in range(1, 101):
	if int(i*0.5)==i*0.5:
		print(i)

1. [i for i in range(1, 100) if int(i*0.5)==(i*0.5)]

2. [i for i in range(1, 101) if int(i*0.5)==(i*0.5)]

3. [i for i in range(1, 101) if int(i*0.5)=(i*0.5)]

4.[i for i in range(1, 100) if int(i*0.5)=(i*0.5)]


Question:
Write a list comprehension for producing a list of numbers between 1 and 1000 that are divisible by 3.

1. [x in range(1, 1000) if x%3==0]

2. [x for x in range(1000) if x%3==0]

3. [x%3 for x in range(1, 1000)]

4.[x%3=0 for x in range(1, 1000)]


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