The tech industry is growing like never before.
Every now and then, we see new software products released in the market.
However, youll need to prepare yourself.
Otherwise, someone else might get the job.
Today, Im gonna share my personal experience of Python interviews with you.
Ill list the questions they asked me including their possible solutions.
So itll be an ultimate guide for you to get hired as a Python Programmer.
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Now retrieve only those records where Sepal.Length is greater than six and Sepal.
How can we add corresponding items of both arrays?
3 What is*argsand**kwargs?
Give an example for each.
Both of these are used to pass a variable number of arguments in a function.
4 How do you check all the functions and properties available in a module?
We can pass the module name inside thedir()function to retrieve its functions and properties names.
For example:
Lets say we have a module calledm.pywith a variable and two user-defined functions.
Here you’re able to see thedir()function also gets all the built-in properties and methods.
5 What are literals in Python?
In Python, literal is the data/value assigned to a variable or constant.
The concatenation of tuples refers to the process through which we can join two or more tuples.
Basically, this statement will add the elements oftuple_2at the end oftuple_1.
Like this:
7 What is lambda in Python?
Lambda is a small function in Python that can only process one expression.
But, we can add as many parameters as needed.
Generally, its more suitable to use the lambda function inside of another function.
Slicing is a process to retrieve parts of a string, array, list, or tuple.
Basically, we pass a start and end index to specify the position of data were interested in.
We can even pass astepvalue to skip some data.
For example, retrieve every other item from an array.
In the below code snippet, the slicing is performed usingsquare brackets[].
We passed three arguments and separated them with a colon:symbol.
All of the three parameters of slicing are optional.
If we dont specify the start then Python will assume 0 index as the starting position.
Similarly, when we skip the second parameter then the length of array/string/tuple/list will be used.
Whereas, by default Python consider 1 as a step.
9 What are Python decorators?
Python decorator is a feature that is used to enhance the functionality of an existing function or a class.
It is preferred when a developer wants to dynamically update the working of a function without actually modifying it.
Lets say we have a function that prints the name of the website developer.
We can add this functionality with the help of a decorator function.
10 Which algorithm is used bysort()andsorted()functions?
sort()andsorted()functions implement the Timsort algorithm.
It is because this sorting algorithm is very stable and efficient.
The value ofBig Oin its worst case isO(N log N).
11 How do you debug a Python program?
By default, Python comes with a built-in debugger known aspdb.
We can start the debugging of any Python file by executing a command something like mentioned below.
12 What is pickling and unpickling?
In Python, there is a very popular library calledpickle.
It is used for object serialization.
Meaning that it takes a Python object as input and converts it into a byte stream.
This whole process of transforming a Python object is known as pickling.
On the other hand, unpickling is its opposite.
Here, a byte stream is accepted as input and transformed into an object hierarchy.
13 What is list comprehension?
And provide an example
List Comprehension is a quick way to create a Python list.
In Python, there is no such concept of tuple comprehension.
15 What is monkey patching in Python?
The process to dynamically change a class or module at run-time is known as Monkey Patching.
Did you spot that I actually calledfunc()method but the output I received was fromwelcome()?
16 Predict the output of the below code?
Before printing, we just updated the value ofxin theParentclass.
It automatically updates the value ofChild_2.xbut not theChild_1.x.
It is because we have already set the value ofChild_1.x.
In other words, Python tries to use the properties/methods of child class first.
It only searches the parent class if the property/method is not found in the child class.
17 How do you display ancestors of a given node in Binary Tree?
Lets suppose we have this binary tree.
Now, retrieve the ancestors of65and display them using Python code.
Conclusion
Practicing for an interview is super important to land your dream job.
In this article, weve covered some popular interview questions but theres much more you should know.
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