Coforge DPA Pega Developer Interview Questions and Answers

Programming questions related to Python and React.

Programmatical problem related to Python and React

Q1. Salary Discussion
Add your answer

Programming Problems related to react and python.

Q1. Object Oriented Programming, Memory Management, Multiprocessing, multithreading, GIL, React Components
Add your answer

Q1. Object Oriented Programming, GIL, Multi threading, multiprocessing, React Component, Shallow Copy, Deep Copy
Add your answer

Q1. Object Oriented Programming, GIL, Multi threading, multiprocessing, React Component, Shallow Copy, Deep Copy
Add your answer

Q1. Object Oriented Programming, GIL, Multi threading, multiprocessing, React Component, Shallow Copy, Deep Copy
Add your answer

Q1. Object Oriented Programming, GIL, Multi threading, multiprocessing, React Component, Shallow Copy, Deep Copy, Django ORM, Class Inheritance
Add your answer

It's walkin, so they conducted 1 technical mcqs round.

Q1. Multi threading
Add your answer
Q2. Internal working of hashmap
Ans. 
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
• HashMap uses an array of buckets to store key-value pairs.

• Keys are hashed to determine the index in the array where the key-value pair will be stored.

• In case of hash collisions, a linked list or a balanced tree is used to store multiple key-value pairs in the same bucket.

• HashMap allows null keys...read more
Answered by AI
Add your answer
Q3. Spring batch related
Add your answer
Q4. Non repeating characters in a array
Ans. 
Function to find and return all non-repeating characters in an array of strings.
• Iterate through the array and count the occurrences of each character using a HashMap.

• Then iterate through the array again and check if the count of each character is 1, if so add it to the result list.

• Return the list of non-repeating characters.
Answered by AI
Add your answer
Q5. 3rd highest salary
Ans. 
To find the 3rd highest salary in a database, we can use a SQL query with the 'LIMIT' and 'OFFSET' keywords.
• Use a SQL query with 'ORDER BY salary DESC' to sort the salaries in descending order.

• Use 'LIMIT 1 OFFSET 2' to skip the first two highest salaries and retrieve the third highest salary.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2;
Answered by AI
Add your answer
Q6. Qualifier vs primary
Ans. 
A qualifier in Java is used to specify additional information about a primary, which is the main data type or variable.
• A primary in Java is the main data type or variable, while a qualifier provides additional information about the primary.

• Qualifiers can be used to modify the behavior or characteristics of a primary.

• For example, in Java, 'final' is a qualifier that can be used to make a variable constant.
Answered by AI
Add your answer
Q7. Controller vs restcontroller
Ans. 
The main difference is that @RestController is a specialized version of @Controller that is used for RESTful web services.
• Both @Controller and @RestController are used in Spring MVC to handle HTTP requests, but @RestController is specifically used for RESTful web services.

• @Controller is used to create web pages, while @RestController is used to return data in JSON or XML format.

• @RestController is a convenience annotati...read more
Answered by AI
Add your answer
Q8. Spring boot annotataions
Add your answer
Q9. Oops concepts with examples
Ans. 
OOP concepts include inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism: Ability for objects to be treated as instances of their paren...read more
Answered by AI
Add your answer
Q10. Spring batch configuration
Add your answer
Q11. They covered all java, spring and Microservices
Add your answer

Q1. Microservices architecture
Add your answer
Q2. How do Microservices communicate
Ans. 
Microservices communicate with each other through various communication protocols like HTTP, messaging queues, and gRPC.
• Microservices can communicate over HTTP using RESTful APIs.

• Messaging queues like RabbitMQ or Kafka can be used for asynchronous communication between microservices.

• gRPC is a high-performance, open-source RPC framework that can be used for communication between microservices.

• Service discovery mechanism...read more
Answered by AI
Add your answer
Q3. How to access the Microservice end point
Ans. 
Microservice endpoints can be accessed using HTTP requests with the appropriate URL
• Use HTTP methods like GET, POST, PUT, DELETE to interact with the microservice

• Construct the URL with the base URL of the microservice and the specific endpoint path

• Include any necessary headers or parameters in the request for authentication or data filtering
Answered by AI
Add your answer
Q4. Why we use microservices
Ans. 
Microservices allow for modular, scalable, and flexible software development by breaking down applications into smaller, independent services.
• Microservices enable easier maintenance and updates as each service can be developed, deployed, and scaled independently.

• They improve fault isolation, as failures in one service do not necessarily affect the entire application.

• Microservices promote agility and faster time-to-mark...read more
Answered by AI
Add your answer

It was an amazing interview.

S abJDQdlqd qk; qdkq;q bdkq;d

Q1. Dbjas xjhqvUGQJQ mnq
Add your answer
Q2. Add qbnjq j qj slx qx
Add your answer
Q3. DaD JDQ d KNX ax sqkd
Add your answer
Q4. Bj q dsa k xkqs xkna ;x
Add your answer
Q5. DJ m qd s Jhdvaljcbaf
Add your answer

Q1. How can we return multiple data with different data types from a function in .c#
Ans. 
To return multiple data with different data types from a function in .c#, use Tuple or create a custom class with properties for each data type.
• Use Tuple to return multiple data with different data types. For example: Tuple

• Create a custom class with properties for each data type and return an instance of that class. For example: public class CustomData { public int Number { get; set; } public string
Answered by AI
Add your answer
Q2. How to Optimize Stored Procedure
Ans. 
Optimizing stored procedures involves reducing execution time and resource usage.
• Use proper indexing on tables involved in the stored procedure

• Avoid using SELECT * and only fetch necessary columns

• Minimize the use of temporary tables and cursors

• Avoid using scalar functions in WHERE clauses

• Consider using table-valued functions instead of scalar functions
Answered by AI
Add your answer
Q3. How do you run Azure Functions Locally
Ans. 
Azure Functions can be run locally using Azure Functions Core Tools
• Install Azure Functions Core Tools using npm

• Create a new Azure Functions project using func init command

• Run the Azure Functions project locally using func start command
Answered by AI
Add your answer
Q4. API Rate Limiting
Add your answer
Q5. API Return Types
Add your answer
Q6. What is a Partial Class
Ans. 
Partial class is a class that allows splitting the definition of a class into multiple files.
• Partial classes are used to divide a large class into smaller, more manageable parts.

• Each part of a partial class must use the 'partial' keyword.

• All parts of a partial class must be in the same namespace and assembly.

• Partial classes are commonly used in code generation scenarios.

• Example: public partial class MyClass { }
Answered by AI
Add your answer

2 DSA medium questions was asked.

2 DSA coding questions and CS fundamentals

Q1. System design questions in a projects
Add your answer

Q1. MC question on desing pattern
Add your answer
Q2. Graph question, tree and hash
Add your answer
Q3. Design Book my show
Add your answer

Dp question of jump game

Q1. How to optimise fetching 1 lakh entries from db
Ans. 
Use pagination, indexing, caching, and query optimization to fetch 1 lakh entries efficiently from the database.
• Implement pagination to fetch data in smaller chunks

• Create indexes on columns frequently used in queries

• Use caching to store frequently accessed data

• Optimize queries by avoiding unnecessary joins and using appropriate indexes

• Consider using database-specific optimizations like query hints or stored procedures
Answered by AI
Add your answer

Q1. Ask questions related to CSS, Javascript, React, Node and Cloud stuff
Add your answer