NumPy Online Quiz, NumPy MCQ Quiz, W3Schools, Great Learning

1 .

The most important object defined in NumPy is an N-dimensional array type called?

A)

narray

B)

darray

C)

nd_array

D)

ndarray

Correct Answer : Option (D) : ndarray

Explanation : The most important object defined in NumPy is an N-dimensional array type called ndarray.

2 .

The basic ndarray is created using?

A)

numpy.array(object, dtype = None, copy = True, order = None, ndmin = 0)

B)

numpy.array(object, dtype = None, copy = True, subok = False, ndmin = 0)

C)

numpy.array(object, dtype = None, copy = True, order = None, subok = False, ndmin = 0)

D)

numpy_array(object, dtype = None, copy = True, order = None, subok = False, ndmin = 0)

Correct Answer : Option (C) : numpy.array(object, dtype = None, copy = True, order = None, subok = False, ndmin = 0)

Explanation : It creates an ndarray from any object exposing array interface, or from any method that returns an array : numpy.array(object, dtype = None, copy = True, order = None, subok = False, ndmin = 0).

3 .

Each built-in data type has a character code that uniquely identifies it.What is meaning of code "M"?

A)

objects

B)

Unicode

C)

datetime

D)

timedelta

Correct Answer : Option (C) : datetime

4 .

What is the range of uint32 data type?

A)

(0 to 4294967295)

B)

(0 to 65535)

C)

(-32768 to 32767)

D)

(-2147483648 to 2147483647)

Correct Answer : Option (A) : (0 to 4294967295)

Explanation : uint32 : Unsigned integer (0 to 4294967295)

5 .

What will be output for the following code?

import numpy as np 
dt = np.dtype([('age',np.int8)]) 
a = np.array([(10,),(20,),(30,)], dtype = dt) 
print a['age']

A)

[10]

B)

[10 20 30]

C)

[[10 20 30]]

D)

Error

Correct Answer : Option (B) : [10 20 30]

6 .

What will be output for the following code?

import numpy as np 
dt = dt = np.dtype('i4') 
print dt

A)

int16

B)

int32

C)

int64

D)

int128

Correct Answer : Option (B) : int32

7 .

What will be output for the following code?

import numpy as np 
a = np.array([1,2,3]) 
print a

A)

[1]

B)

[[1, 2, 3]]

C)

[1, 2, 3]

D)

Error

Correct Answer : Option (C) :

8 .

What will be output for the following code?

import numpy as np 
a = np.array([1, 2, 3,4,5], ndmin = 2) 
print a

A)

[1, 2]

B)

[1, 5]

C)

[1, 2, 3, 4, 5]

D)

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

Correct Answer : Option (D) : [[1, 2, 3, 4, 5]]

9 .

To create sequences of numbers, NumPy provides a function __________ analogous to range that returns arrays instead of lists.

A)

arange

B)

aline

C)

aspace

D)

All of the Above

Correct Answer : Option (A) : arange

Explanation :

When arange is used with floating point arguments, it is generally not possible to predict the number of elements obtained.

10 .

Point out the wrong statement.

A)

matplotlib will enable you to plot graphics

B)

ipython is an enhanced interactive Python shell

C)

Both (a) and (b)

D)

rPy provides a lot of scientific routines that work on top of NumPy

Correct Answer : Option (D) : rPy provides a lot of scientific routines that work on top of NumPy

Explanation : SciPy provides a lot of scientific routines that work on top of NumPy.