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Cognizant Python Developer Interview Questions and Answers
12 Interview questions
One recursion problem is to find the factorial of a number.
The base case is when the number is 0 or 1.
The recursive case is to multiply the number with the factorial of (number-1).
Example: factorial(5) = 5 * factorial(4) = 5 * 4 * factorial(3) = ... = 5 * 4 * 3 * 2 * 1 = 120.
Find second highest number from list without using inbuilt functions
Sort the list in descending order
Return the second element of the sorted list
Tuple is immutable and ordered while list is mutable and ordered.
Tuple uses () while list uses []
Tuple is faster than list for accessing elements
Tuple can be used as keys in dictionaries while list cannot
Tuple can be used in string formatting while list cannot
Python is used in reality due to its simplicity, versatility, and wide range of applications.
Python is easy to learn and read, making it a popular choice for beginners.
It has a large standard library and many third-party modules, allowing for rapid development.
Python is used in web development, data analysis, machine learning, scientific computing, and more.
It is cross-platform and can run on various operating sys...
What people are saying about Cognizant
Yes, init method is a special method in Python classes used to initialize objects.
The init method is called automatically when an object is created from a class.
It is used to set initial values for object attributes.
The init method always takes the 'self' parameter as the first argument.
Example: def __init__(self, name, age): self.name = name; self.age = age
The init method can also be used to perform any other set...
Variables are names given to memory locations while objects are instances of a class with attributes and methods.
Variables are used to store values while objects are used to represent real-world entities.
Variables can be reassigned to different values while objects have a fixed identity.
Variables are created when they are assigned a value while objects are created using constructors.
Variables can be of different d...
Pickling is a way to serialize Python objects, while non-pickling refers to objects that cannot be pickled.
Pickling is used to convert Python objects into a byte stream that can be stored or transmitted.
Non-pickling objects are those that cannot be serialized using the pickle module.
Examples of non-pickling objects include file objects, network sockets, and database connections.
To make an object picklable, it must...
Yes, I have worked on various python projects including web development, data analysis and automation.
Developed a web application using Django framework
Automated data extraction and analysis using pandas library
Created a chatbot using Python and Dialogflow API
Implemented machine learning algorithms for predictive analysis
Integrated Python scripts with other technologies like AWS and Docker
The logic of the program is to reverse a given string word by word without using any built-in function.
Split the string into an array of words using whitespace as the delimiter.
Iterate through the array of words in reverse order.
Append each word to a new string, separated by a space.
I rate myself as an experienced Python developer with strong skills in various Python libraries and frameworks.
I have worked on various Python projects and have a good understanding of the language syntax and concepts.
I am proficient in using popular Python libraries such as NumPy, Pandas, and Matplotlib for data analysis and visualization.
I have experience in developing web applications using Python frameworks su...
Cognizant Python Developer Interview Experiences
9 interviews found
Anonymous
Selected
Avg aptitude questions
2 easy coding questions
(2 Questions)
- Q1. Array question in python
- Q2. SQL query based on condition
Selected
I applied via Recruitment Consulltant and was interviewed in Jun 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Purely basic pythons
- Q2. Coding test writing
Interview Preparation Tips
I applied via Recruitment Consulltant and was interviewed in May 2022. There were 2 interview rounds.
(4 Questions)
- Q1. Difference between tuple and list.
- Ans.
Tuple is immutable and ordered while list is mutable and ordered.
Tuple uses () while list uses []
Tuple is faster than list for accessing elements
Tuple can be used as keys in dictionaries while list cannot
Tuple can be used in string formatting while list cannot
- Q2. What is decorator?why we are using decorator? Write a program for decorator?
- Ans.
A decorator is a design pattern in Python that allows modifying the behavior of a function or class without changing its source code.
Decorators are functions that take another function as an argument and return a new function.
They are used to add functionality to an existing function or class.
They can be used to modify the behavior of a function, such as adding logging or timing functionality.
They can also be used to e...
- Q3. Give one recursion problem .
- Q4. Find second highest number from list without using inbuilt functions
Interview Preparation Tips
Skills evaluated in this interview
(1 Question)
- Q1. Why python is used in reality
- Ans.
Python is used in reality due to its simplicity, versatility, and wide range of applications.
Python is easy to learn and read, making it a popular choice for beginners.
It has a large standard library and many third-party modules, allowing for rapid development.
Python is used in web development, data analysis, machine learning, scientific computing, and more.
It is cross-platform and can run on various operating systems.
...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Apr 2022. There were 3 interview rounds.
(1 Question)
- Q1. Python fundamental need to be strong
(1 Question)
- Q1. General - Related to salary, notice period, etc
Interview Preparation Tips
Ajay Kumar Shaw
I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.
Interview Questionnaire
10 Questions
- Q1. Give your introduction.
- Q2. What was you work/role in current company?
- Q3. Have you done anything on python related developments.
- Q4. What is the difference between variable and object?
- Q5. Have you heard about init method?
- Ans.
Yes, init method is a special method in Python classes used to initialize objects.
The init method is called automatically when an object is created from a class.
It is used to set initial values for object attributes.
The init method always takes the 'self' parameter as the first argument.
Example: def __init__(self, name, age): self.name = name; self.age = age
The init method can also be used to perform any other setup or...
- Q6. What is inheritance and what are its types?
- Ans.
Inheritance is a way to create a new class by inheriting properties and methods from an existing class.
It allows code reusability and saves time.
Types of inheritance are single, multiple, multilevel, and hierarchical.
Single inheritance involves inheriting properties and methods from a single parent class.
Multiple inheritance involves inheriting properties and methods from multiple parent classes.
Multilevel inheritance ...
- Q7. Have you heard about pickling and non pickling?
- Q8. What models you made in your ML projects(in my intro i told that I was working on datasets and making ML models)?
- Q9. Why you want to relocate to Bangalore?
- Q10. Tell me the logic of program to reverse a given string word by word without using any built in function.
Interview Preparation Tips
Skills evaluated in this interview
(1 Question)
- Q1. Yes also than python and machine learning based
Interview Preparation Tips
I applied via LinkedIn and was interviewed in Feb 2022. There was 1 interview round.
(1 Question)
- Q1. When did you content an interview
Interview Preparation Tips
- Python Full Stack
I applied via Campus Placement and was interviewed in Jun 2021. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. How do you rate yourself in python
Interview Preparation Tips
Skills evaluated in this interview
Interview questions from similar companies
I applied via LinkedIn and was interviewed before Jul 2021. There were 2 interview rounds.
Easy logical questions
basic quant
Easy level coding questions
Counting frequency of alphabets
Interview Preparation Tips
Hoisting
Cognizant Interview FAQs
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based on 2 interview experiences
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Cognizant Python Developer Reviews and Ratings
based on 11 reviews
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