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Cognizant Python Software Developer Interview Questions and Answers
6 Interview questions
Python does not have pointers like C/C++, but it uses references to manage memory and object access.
In Python, variables are references to objects, not the objects themselves.
Example: If 'a = [1, 2, 3]' and 'b = a', both 'a' and 'b' refer to the same list.
Modifying 'b' will also change 'a': 'b.append(4)' makes 'a' become [1, 2, 3, 4].
Immutable types (like integers and strings) behave differently; they create new o...
A data program in Python processes, analyzes, and visualizes data using libraries and tools for insights and decision-making.
Data programs often utilize libraries like Pandas for data manipulation.
Example: Using Pandas to read a CSV file: `df = pd.read_csv('data.csv')`.
Data visualization can be done using Matplotlib or Seaborn.
Example: Creating a simple plot: `plt.plot(df['x'], df['y'])`.
Data programs may include ...
A one-line function is a function written in a single line of code, typically used for simple operations.
One-line functions are concise and easy to read, often used for simple tasks like mathematical operations or string manipulation.
They are commonly used in lambda functions in Python.
Example: lambda x: x**2
Use SQL JOIN to combine rows from two tables based on a related column between them.
Use JOIN keyword in SQL to combine rows from two tables based on a related column
Types of JOINs include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Example: SELECT * FROM table1 JOIN table2 ON table1.column = table2.column
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Use SQL query with DISTINCT keyword to remove duplicates from the table.
Use SELECT DISTINCT column_name FROM table_name to retrieve unique values from a specific column.
Use DELETE FROM table_name WHERE column_name IN (SELECT column_name FROM table_name GROUP BY column_name HAVING COUNT(*) > 1) to remove duplicates from the table.
Polymorphism in OOPs refers to the ability of a single function or method to operate on different types of data.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
It enables a single interface to represent different data types.
There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).
Example: In Python, the '+' operator can ...
Cognizant HR Interview Questions
Cognizant Python Software Developer Interview Experiences
4 interviews found
Anonymous
Selected
I appeared for an interview in Feb 2025, where I was asked the following questions.
- Q1. Python code source
- Q2. Python pointer program
- Q3. What are the uses of keywords in Python?
- Q4. Python in structure & input
- Q5. What are the various data structures available in Python?
- Q6. What are the different uses of Python?
- Q7. What is a data program in Python?
- Q8. What are the key features of Python as a high-level programming language?
- Q9. What are the uses of Python in your company?
- Q10. Python เคชเฅเคเคเคเคฐ use
- Ans.
Python does not have pointers like C/C++, but it uses references to manage memory and object access.
In Python, variables are references to objects, not the objects themselves.
Example: If 'a = [1, 2, 3]' and 'b = a', both 'a' and 'b' refer to the same list.
Modifying 'b' will also change 'a': 'b.append(4)' makes 'a' become [1, 2, 3, 4].
Immutable types (like integers and strings) behave differently; they create new object...
- Q11. Python hjfnmmmmmmm
- Q12. Python ai use
- Q13. Python usea jk
Interview Preparation Tips
Selected
I applied via Recruitment Consulltant and was interviewed in Aug 2023.ย There was 1 interview round.
(4 Questions)
- Q1. What is a one-line function?
- Ans.
A one-line function is a function written in a single line of code, typically used for simple operations.
One-line functions are concise and easy to read, often used for simple tasks like mathematical operations or string manipulation.
They are commonly used in lambda functions in Python.
Example: lambda x: x**2
- Q2. What is polymorphism in OOps?
- Ans.
Polymorphism in OOPs refers to the ability of a single function or method to operate on different types of data.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
It enables a single interface to represent different data types.
There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).
Example: In Python, the '+' operator can be us...
- Q3. Remove duplicates from the table.
- Q4. Join two tables?
- Ans.
Use SQL JOIN to combine rows from two tables based on a related column between them.
Use JOIN keyword in SQL to combine rows from two tables based on a related column
Types of JOINs include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Example: SELECT * FROM table1 JOIN table2 ON table1.column = table2.column
Interview Preparation Tips
- Python
- OOPS
- SQL-Join
- SQL-windows
- Lamdafunction
- ClasssIObjects
Skills evaluated in this interview
I applied via Recruitment Consulltant and was interviewed in Oct 2023.ย There were 2 interview rounds.
(2 Questions)
- Q1. Basics of python
- Q2. Practice all the basic functions and datatypes
Interview Preparation Tips
I applied via Company Website and was interviewed in May 2022.ย There were 3 interview rounds.
Self indutroduction and my personal questions and technical support question
(2 Questions)
- Q1. Self indutroduction and python basis and codeling uses to the python and c language
- Q2. Python basis question and apptitude question
Interview Preparation Tips
Interview questions from similar companies
I applied via Campus Placement and was interviewed before Aug 2020.ย There were 3 interview rounds.
Interview Questionnaireย
3 Questions
- Q1. What is a bit
- Ans.
A bit is the smallest unit of data in computing, representing a binary value of 0 or 1.
A bit can represent two states: off (0) or on (1).
Bits are the building blocks of all digital data, including text, images, and sound.
In binary code, a sequence of bits can represent numbers, letters, and commands.
For example, the letter 'A' is represented as 01000001 in binary, which is 65 in decimal.
- Q2. What us the size of a bit
- Ans.
A bit is the smallest unit of digital information. It can have a value of either 0 or 1.
A bit is a binary digit, represented as either 0 or 1.
It is the basic unit of information used in computing and digital communications.
A group of 8 bits is called a byte.
The size of a bit is dependent on the architecture of the computer system.
- Q3. How many bits are there in C
- Ans.
C is a programming language and does not have a fixed number of bits.
C is a high-level programming language that can be compiled to run on different architectures with varying bit sizes.
The number of bits in C depends on the hardware architecture it is compiled for.
For example, C code compiled for a 32-bit architecture will have 32-bit integers, while code compiled for a 64-bit architecture will have 64-bit integers.
Interview Preparation Tips
Skills evaluated in this interview
I applied via Recruitment Consultant and was interviewed before Oct 2020.ย There was 1 interview round.
Interview Questionnaireย
2 Questions
- Q1. What is Abstraction
- Q2. Concept of hiding implementation
Interview Preparation Tips
I applied via Campus Placement and was interviewed in Apr 2020.ย There were 4 interview rounds.
Interview Questionnaireย
1 Question
- Q1. All technical discussion not much deeper but basic questions of graduation were asked
Interview Preparation Tips
I applied via Recruitment Consultant and was interviewed before Oct 2020.ย There were 4 interview rounds.
Interview Questionnaireย
1 Question
- Q1. Questions on string manipulation
Interview Preparation Tips
I applied via Naukri.com and was interviewed before May 2020.ย There were 3 interview rounds.
Interview Questionnaireย
1 Question
- Q1. Servicenow related questions
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Aug 2020.ย There were 3 interview rounds.
Interview Questionnaireย
1 Question
- Q1. Oops Concepts and Data Structure Questions.
Interview Preparation Tips
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