QUIZ ON : python - NUMPY BASICS

NUMPY BASICS

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Question No# : 01 out of 50

What is the output of the following code ?<pre>import numpy as np a = np.array([[1,2,3]]) print(a.shape)</pre>

A. (2,3)

B. (3,1)

C. (1,3)

D. None of These

Question No# : 02 out of 50

What will be the output of the following Python code?<pre>len(["hello",2, 4, 6])</pre><div> </div>

A. Error

B. 6

C. 4

D. 3

Question No# : 03 out of 50

What is a correct method to split arrays?

A. array_split()

B. split()

C. split_array()

D. hstack() and vstack()

Question No# : 04 out of 50

How can you create a NumPy array from a Python list?

A. numpy.array(list)

B. numpy.array(list, dtype=float)

C. Both a and b

D. None of the above

Question No# : 05 out of 50

In NumPy, what does the SHAPE of an array mean?

A. the shape is the number of rows

B. the shape is the number of columns

C. the shape is the number of element in each dimension

D. Total number of elements in array

Question No# : 06 out of 50

What will be the output of the following ?<pre>import numpy as np a = np.arange(1,5,2) print(a)</pre>

A. [1 3 5]

B. [1 3]

C. [1,3]

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

Question No# : 07 out of 50

What is the datatype of x ?<pre>import numpy as np a=np.array([1,2,3,4]) x=a.tolist()</pre><div> </div>

A. int

B. array

C. tuple

D. list

Question No# : 08 out of 50

What will be the output of the following ?<pre>import numpy as np a = np.array([[ 1,2,3,4], [5,6,7,8], [9,10,11,12]]) print(a[2,2])</pre>

A. 7

B. 11

C. 10

D. 8

Question No# : 09 out of 50

which one is the correct syntax to create an array of type float?

A. arr=np.float([1,2,3,4])

B. arr=np.array([1,2,3,4]).toFloat()

C. arr=np.array([1,2,3,4],dtype='float')

D. arr=np.farray([1,2,3,4])

Question No# : 10 out of 50

What will be output for the following code?<pre>import numpy as np a = np.array([1,2,3,5,8]) b = np.array([0,3,4,2,1]) c = a + b c = c*a print (c[2])</pre>

A. 18

B. 20

C. 21

D. 22

Question No# : 11 out of 50

Which syntax would print the last 3 numbers from the array below:<pre>arr = np.array([1,2,3,4,5,6,7])</pre>

A. print(arr[3:])

B. print(arr[3])

C. print(arr[:3])

D. print(arr[4:])

Question No# : 12 out of 50

NumPY stands for?

A. Numbering Python

B. Number in Python

C. Numerical Python

D. Number for Python

Question No# : 13 out of 50

How can you perform element-wise addition of two NumPy arrays arr1 and arr2?

A. arr1 + arr2

B. add(arr1, arr2)

C. arr1.add(arr2)

D. elementwise_add(arr1, arr2)

Question No# : 14 out of 50

What will be the output of the following ?<pre>import numpy as np a=np.array([2,4,1]) b=a a[1]=3 print(b)</pre><div> </div>

A. [2 4 1]

B. [3 4 1]

C. [2 3 1]

D. [2 4 3]

Question No# : 15 out of 50

What are the attributes of numpy array?

A. shape, dtype, ndim

B. objects, type, list

C. objects, non vectorization

D. Unicode and shape

Question No# : 16 out of 50

How can you import NumPy in a Python script?

A. import numpy

B. import np

C. from math import numpy

D. import numPy as np

Question No# : 17 out of 50

What is a correct syntax to check the number of dimensions in an array?

A. np.ndim(array_name)

B. array_name.ndim()

C. np.dim(array_name)

D. array_name.dim

Question No# : 18 out of 50

What is the main object type in NumPy that represents homogeneous arrays?

A. List

B. Array

C. Matrix

D. Set

Question No# : 19 out of 50

Numpy array's dimension are known as

A. axes

B. degree

C. cordinate

D. points

Question No# : 20 out of 50

What is a correct syntax to create a NumPy array?

A. np.array([4,5,6])

B. np.create_array([4,5,6])

C. np.createArray([4,5,6])

D. np.numpyArray([4,5,6])

Question No# : 21 out of 50

What will be the output of the following code?<pre>import numpy as np a=np.array([1,2,3]) print(a.ndim)</pre><div> </div>

A. 1

B. 2

C. 3

D. 0

Question No# : 22 out of 50

What will be the output of the following ?<pre>import numpy as np a = np.array( [2, 3, 4, 5] ) b = np.arange(4) print(a+b)</pre>

A. [2 3 4 5]

B. [3 4 5 6]

C. [1 2 3 4]

D. [2 4 6 8]

Question No# : 23 out of 50

What is the data type of elements in a NumPy array?

A. Only integers

B. Only floating-point numbers

C. Homogeneous, but can be integers or floating-point numbers

D. Heterogeneous, supporting a mix of data types

Question No# : 24 out of 50

What is zeros() function in numpy use to?

A. make a matrix with first column 0

B. make a matrix with all elements 0

C. make a matrix with diagonal elements 0

D. All of the above

Question No# : 25 out of 50

What will be output for the following code ?<pre>import numpy as np a=np.array([2,3,4,5]) print(a.dtype)</pre><div> </div>

A. int32

B. int

C. float

D. none of these

Question No# : 26 out of 50

Getting and setting the value of individual array elements:

A. Indexing

B. Slicing

C. Reshaping

D. None of the above

Question No# : 27 out of 50

What will be output for the following code?<pre>import numpy as np a=np.array([[1,2,3],[0,1,4]]) print (a.size)</pre><div> </div>

A. 1

B. 5

C. 6

D. 4

Question No# : 28 out of 50

What does size attribute in numpy use to find?

A. Number of Rows and Column in array

B. Size of each items in array

C. Number of elements in array

D. Largest element of an array

Question No# : 29 out of 50

What is the use of shape() in numpy?

A. change in shape of array

B. reshaping of array

C. get the shape of the array

D. All of above

Question No# : 30 out of 50

What is the output of the following code?<pre>import numpy as np a=np.array([1,2,3,5,8]) b=np.array([0,3,4,2,1]) c=a+b c=c*a print(c[2]) </pre><div> </div><div> </div>

A. 10

B. 21

C. 12

D. 28

Question No# : 31 out of 50

What will be the output of the following ?<pre>import numpy as np a = np.arange(1,3,.5) print(a)</pre>

A. [1 2 3]

B. [1. 1.5 2. 2.5]

C. [1. 1.5 2. 2.5 3]

D. [1 1.5 2 2.5 3]

Question No# : 32 out of 50

What is a correct syntax to print the numbers [3, 4, 5] from the array below:<pre>arr = np.array([1,2,3,4,5,6,7])</pre>

A. print(arr[2:4])

B. print(arr[2:5])

C. print(arr[2:6])

D. print(arr[3:6])

Question No# : 33 out of 50

What is the purpose of the np.array() function in NumPy?

A. It creates a new Python list.

B. It creates a NumPy array.

C. It performs element-wise addition.

D. It calculates the mean of an array.

Question No# : 34 out of 50

What will be the output of the following ?<pre>import numpy as np a=np.array([2,4]) b=np.array([3,5]) c=a*b print(c)</pre><div> </div>

A. [ 2 4 3 5]

B. [ 6 20]

C. [ 6 12 10 20]

D. 26

Question No# : 35 out of 50

What will be output for the following code ?import numpy as npary=np.array([1,2,3,5,8])ary=ary+1print(ary[1])<div> </div>

A. 0

B. 1

C. 2

D. 3

Question No# : 36 out of 50

How do you import NumPy in Python?

A. import numpy as np

B. import numPy

C. from python import numpy

D. using numpy

Question No# : 37 out of 50

What will be the output of the following ?<pre>import numpy as np a=np.array([2,4,1]) b=a.copy() a[1]=3 print(b)</pre>

A. [2 4 1]

B. [2 3 1]

C. [3 4 1]

D. [2 4 3]

Question No# : 38 out of 50

Which function is used to generate evenly spaced values within a specified range?

A. numpy.linspace()

B. numpy.range()

C. numpy.arrange()

D. numpy.spaceline()

Question No# : 39 out of 50

_____ creates an uninitialized array of specified shape and dtype.

A. full

B. empty

C. init

D. None of these

Question No# : 40 out of 50

What is a correct syntax to create an array of type float?

A. arr=np.array([1,2,3,4],dtype='float')

B. arr=np.array([1,2,3,4],dtype='f')

C. arr=np.array([1,2,3,4],dtype=float)

D. All of the above

Question No# : 41 out of 50

What will be the output of following Python code?<pre>import numpy as np a = np.array([(10,20,30)]) print(a.itemsize)</pre><div> </div>

A. 10

B. 9

C. 4

D. All of the mentioned above

Question No# : 42 out of 50

NumPY stands for:

A. Numbering Python

B. Number In Python

C. Numerical Python

D. None of the above

Question No# : 43 out of 50

What will be the output of the following ?<pre>import numpy as np a = np.arange(5,1) print(a)</pre>

A. [ ]

B. [1 2 3 4 5]

C. [5 4 3 2 1]

D. [1 2 3 4]

Question No# : 44 out of 50

what will be output for the following code?<pre>import numpy as np a=np.array([1,2,3,5,8]) print(a.ndim)</pre><div> </div>

A. 0

B. 1

C. 2

D. 3

Question No# : 45 out of 50

Which of the following is used to find the largest element in numpy array

A. numpy.maximum()

B. numpy.arraymax()

C. numpy.amax()

D. numpy.big()

Question No# : 46 out of 50

What is the output of the following code?<pre>import numpy as np a = np.array([1,2,3,5,8]) b = np.array([0,1,5,4,2]) c = a + b c = c*a print (c[2])</pre>

A. 6

B. 24

C. 0

D. None of these

Question No# : 47 out of 50

The number of axes in an ndarray is called its ___

A. rank

B. dtype

C. shape

D. None of these

Question No# : 48 out of 50

Which of the following is the primary object in NumPy for representing arrays?

A. Array

B. List

C. Matrix

D. Tuple

Question No# : 49 out of 50

What is a correct syntax to print the number 8 from the array below:<pre>arr = np.array([[1,2,3,4,5], [6,7,8,9,10]])</pre>

A. print(arr[3,0])

B. print(arr[1,2])

C. print(arr[7,2])

D. None of The Above

Question No# : 50 out of 50

What is the primary purpose of NumPy in Python?

A. Web development

B. Machine learning and scientific computing

C. Game development

D. Database management