Python Practice Questions For Beginners

Welcome to your Python Quiz

Where did the Python name come from?

Python Snake

Monty Python’s Circus Flying

Monty Python’s Flying Circus

None of the above

What does the following code do? def a(b, c, d): pass

defines a list and initializes it

defines a function, which does nothing - correct

defines a function, which passes its parameters through

defines an empty class

What is the output? x = True y = False z = False if x or y and z: print('yes') else: print('no')

Yes

Fails to compiler

Which among the following can be an identifier in Python?

@HEllo

1hello

$Hello1

_Hello1

What is the output of the following? 4 | 6

What is the output of the following? 10<<1

None of the above

Which of the following is going to throw an exception out of the following?

A = 10

int A = 10

Name = 'Noah'

What is the output of the following? List1 = ['Python', 'Py', 'Pyth', 'Python3'] print(List1[-1][2])

Python

What is the output of the following? x = range(10) y = sum(x) print(y)

An exception is thrown

What is the output of the following? List1 = ['Python', 'Py', 'Pyth', 'Python3'] List2 = List1*2 List3 = List1[:] List2[0] = 'Hello' List3[1] = 'World' sum = 0 for ls in (List1, List2, List3): if ls[0] == 'Hello': sum += 1 if ls[1] == 'World': sum += 2 print(sum, List2)

3 ['Hello', 'Py', 'Pyth', 'Python3', 'Python', 'Py', 'Pyth', 'Python3']

2 ['Hello', 'Py', 'Pyth', 'Python3']

3 ['Hello', 'Py', 'Pyth', 'Python3']

2 ['Hello', 'Py', 'Pyth', 'Python3', 'Python', 'Py', 'Pyth', 'Python3']

We have two lists a=['a','b'] b=['r','n'] We want to achieve the following output ['a', 'b', ['r', 'n']] Which of the following should be used?

a.extend(b)

a.append(b)

a.insert(1,b)

None

Which of the following will be used to write to csv file?

pd.read_csv('Filename.csv')

pd.read_file('Filename.csv')

dataframe.read_ csv('Filename.csv')

dataframe.read_file('Filename.csv')

What will be the output of the following: import pandas as pd arr=[[1,2],[4,5],[7,8]] df = pd.DataFrame(arr, index = ['a','b','c'], columns = ['A', 'B']) df.loc[:,'A']

a 1 b 4 c 7

0 1 1 4 2 7

1 1 2 2 3 4

a 1 b 2 c 4

To view the first 15 rows of the a given csv dataset, which command is used? import pandas as pd Dataframe1=pd.read_csv('somedataset.csv')

Dataframe1.row(15)

Dataframe1.row(0:15)

Dataframe1.head(0:15)

Dataframe1.head(15)

To rename a column in a given csv dataset, which command is used? import pandas as pd Dataframe1=pd.read_csv('somedataset.csv')

Dataframe1.rename(columns={'Old-name':'New-name'})

Dataframe1.title('Old-name':'New-name')

Dataframe1.rename('Old-name':'New-name')

Dataframe1.title(columns={'Old-name':'New-name'})

What is the output of the following: one = ['one','1','one1'] a = ['A','a','Aa'] df1 = pd.DataFrame({'one': one, 'a': a}) df1 = df1[['one', 'a']] a = ['A','a','Aa'] b = ['B','b','Bb'] df2 = pd.DataFrame({'a': a, 'b': b}) df2 = df2[['a', 'b']] df1.merge(df2, on='a', how='inner')

one a b 0 one A B 1 1 a b 2 one1 Aa Bb

a b one 0 A B one 1 a b 1 2 Aa Bb one1

a one b 0 A one B 1 a 1 b 2 Aa one1 Bb

0 1 2 one one 1 one1 a A a Aa b B b Bb

Which of the following will be used to find out the zscore of the given numpy array? from scipy import stats import numpy as np numarr=np.array([9,8,7,6,5,4,3,2,1,0])

np.stats.zscore(numarr)

stats.zscore(numarr)

stats.zcores(numarr)

np.stats.zscores(numarr)

Find out the correct output: import numpy as np from scipy import stats new=np.array([[0.1,1,2],[3,0.2,1],[1,0.5,4]]) _,p,_,_ =stats.chi2_contingency(new) p

0.2464

1.0929

2.3111

None of the above

Find out the correct output: from scipy import linalg import numpy as np new=np.array([[0.1,1,2],[3,0.2,1],[1,0.5,4]]) linalg.det(new)

8.37

-8.37

None of the above

Find out the correct cluster index array for the following: from scipy.cluster.vq import kmeans,vq,whiten import matplotlib.pyplot as plt new=[0.1,1,3,0.2,1,0.5,12,0.2,10,0.5,10,2,5,0.8] plt.scatter(range(len(new)),new) centroid,_ = kmeans(new,2) idx, _ = vq(new,centroid) idx

array([1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1])

array([1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1])

array([1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1])

Which of the following is used to find double integration:

doublequad

dblquad

quadquad

None

What is the output of the following? import numpy array_1 = numpy.array([[1,2,3],[0,0,0]]) array_2 = numpy.array([[0,0,0],[7,8,9]]) print(numpy.concatenate((array_1, array_2), axis = 1))

[[1 2 3 0 0 0 0 0 0 7 8 9]]

[[1 2 3 0 0 0] [0 0 0 7 8 9]]

[[1 2 3] [7 8 9]]

None

What is the output? import numpy my_array = numpy.array([1.1, 2.2, 3.3, 4.4, 5.5, 6.6, 7.7, 8.8, 9.9]) print(numpy.ceil(my_array))

[1. 2. 3. 4. 5. 6. 7. 8. 9.]

[ 2. 3. 4. 5. 6. 7. 8. 9. 10.]

[.1 .2 .3 .4 .5 .6 .7 .8 .9]

[.2 .3 .4 .5 .6 .7 .8 .9 .10]

Which of the following is used to plot horizontal bar plot in matplotlib?

matplotlib.pyplot.bar.horizontal()

matplotlib.pyplot.barh()

matplotlib.pytplot.horizontal.bar()

matplotlib.pyplot.hbar()

We are plotting a line plot between two variables, a and b. To add a legend which of the following will be used:

matplotlib.pyplot.legend([a,b],[loc= 'best'])

matplotlib.pyplot.legend(['a', 'b'],[loc='best'])

matplotlib.pyplot.legend(['a', 'b', loc='best'])

matplotlib.pyplot.legend([a, b, loc='best'])

To add title in the plot which of the following is used?

matplotlib.pyplot.plot(title=['name'])

matplotlib.pyplot.plot.title('name')

matplotlib.pyplot.title('name')

matplotlib.pyplot.title(name)

Which of the following represents categorical data?

Area plot

Histogram

Quiver plot

Bar plot

Which of the following is useful to display data with 10 categories?

Histogram

Bar plot

Pie chart

Area plot

Which of the following regression is best suited for dealing with categorical dependent variable?

Linear Regression

Multiple Linear Regression

Logistic Regression

Quantile Regression

Which of the following methods do we use to find the best fit line for data in Linear Regression?

Least Square Error

Maximum Likelihood

Logarithmic Loss

Both a and b

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