Top 33 Python Interview questions and Answers for SDET - QAE - SDE? Python Interview Questions on List

 

Python Interview Question & Answers Set - 01

Python Interview Q&A Set- 02

Automation Testing/SDET Framework Design Link

Java Related Interview Question Set LINK

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If you are new to PYTHON then first check the post on How to Install Python on windows and mac?, once installation is complete then only checkout the below Q&A

How to take screenshot of the current window using Selenium-Python ?

Use the save_screenshot method provided by the webdriver:

from selenium import webdriver

driver = webdriver.Firefox()
driver.get('https://automationreinvented.blogspot.com/')
driver.save_screenshot('screenshot.png')
driver.quit()

If you are preparing for Selenium-Python Interview then also check below Q&A:

Python Interview Question & Answers Set - 01

Python Interview Q&A Set - 02

Python Interview Q&A Set - 03

23. What is Python Lists and give an example?

Python Lists are sequential data types, enclosed with square brackets([]) and elements are separated by comma(,).

Python Lists are mutable i.e. we can change any element(s) of lists if we want to change.

  # defining a list

testList = [1, 2, 3, 4, "Test", "Automation"]

24. How python list slicing works, try to solve below?

print only "test" "automation" from list = [1, 2, 3, 4, "Test", "Automation"]

List slicing: type the range of indexes to get the elements inside that range.

to print only test and automation we need to use :

print(list[4:5])

25. How to check if list contains an element?

Ans: we can use "in", for example:

list1 = [1,2,3,'test','automation']

'test' in list1

o/p True

26.What are the python frameworks you have used for Test Automation?

Ans: Click Here For Answer

27. What is the difference between append and extend?

.append() adds an object to the end of a list.

This also means appending a list adds that whole list as a single element, rather than appending each of its values.

a.append([7,8])

a #=> [3, 4, 5, 6, [7, 8]]

.extend() adds each value from a 2nd list as its own element. So extending a list with another list combines their values.

b = [1,2,3]

b.extend([4,5])

b #=> [1, 2, 3, 4, 5]

28. How to convert Tuples, Strings, Sets to List?

Ans: we can use the list() method, it can convert any sequence datatype into lists.

Tuple = (1, 2, 3, 4)

List1 = list(myTuple)

String = “Automation”

List2 = list(myString)

Set = {1, 2, 3, 4}

List3 = list(Set)

29. What is the difference between “remove” and “pop”?

Ans: 

.remove() removes the first instance of a matching object. 

a = [ 'b', 'b', 'c', 'c']

a.remove('b')

O/p:  ['b', 'c', 'c']  //it has removed the first instance of b

.pop() removes an object by its index.

The difference between pop and del is that pop returns the popped element. This allows using a list like a stack.

a = [’t’, ’t’, ‘r’, ‘r’, 'c', 'c']

a.pop(4)

O/p: [’t’, ’t’, ‘r’, ‘r’, 'c'] //removed the 4th element that is c as index starts from 0

By default, pop removes the last element from a list if an index isn’t specified.

30. How to remove duplicate elements of list?

Ans: The east approach is converting to a set and back to a list, but it wont maintain the order.

list = [5, 6, 6, 1, 1]

list(set(list)) 

O/P=> [1, 5, 6]

Bonus: What are the different environment variables in Python?

Ans: Click Here For Answer

31. How to count the occurrence of a specific object in a list?

Ans: 

The count() method returns the number of occurrences of a specific object. Below we return the number of times the string, “test” exists in a list .

list = [‘test’,’test’,’automation’,’reinvented’,’selenium’]

list.count(‘test’)

O/P:  2

32. What are the rules of variable naming in python?

Ans: Click Here For All The Rules

33.  What are the built-in List methods/functions provided by Python?

Method	Use
len()	returns list length
sort()	sorts the list
min()	returns the minimum value from list
max()	returns the maximum value from list
list()	converts a sequential data type to list
append()	adds an element at the end of the list
clear()	removes all elements from the list
copy()	returns the copied list
reverse()	reverses the order of the elements of the list
sum()	returns the sum of the elements of the list
range()	returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and stops before a specified number
pop()	removes the element at the specified position
remove()	removes the item with the specified value
index()	returns the index of the first element with the specified value
insert()	Adds an element at the specified position

Details of all Python Methods: Click Here For Details

REVISION:

19. Correct the below string:

print(“He is "A" genius”)

Ans: This will give syntax error, If we use backslash “\” followed by the character like ” then the problem will get resolved.

print(“He is \"A\" genius”)

20. How to replace Genius with fool in below string?
 Str = "He is a genius"

Ans: print(Str.replace("genius","fool")

8. How to convert an integer to string in python ? How to perform typecasting?

Ans:
var = 23

varString = str(var). //convert the int datatype to string

9. What is complex datatype in Python?

Ans: Click Here For Answer

10. Let we have below string, we want to print only Automation

x = "TestAutomation"

Ans: print(mystr[4:len(mystr)])

Python Interview Question & Answers Set - 01

Python Interview Q&A Set- 02

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Check below link for question and answers with code:

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Top API INterview Questions 11-20 

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