Informatica Interview Questions, Process, and Tips

ALGORTIH DS JAVA SPRING BOOT

Q1. Questions will be added on java programming, basics of java, unix concepts.
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Q1. Collections, patterns, multithreading, exception handling, file handling questions.
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Harper rank coding question

Q1. Why you left previous company. What’s ur expections.
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Coding on java,with explanation video, proctored

Q1. Explain project framework
Ans. 
Project framework is a structure that provides guidelines, tools, and libraries for developing software applications.
• Provides a foundation for organizing code and implementing best practices

• Includes libraries, tools, and templates to streamline development process

• Can be specific to a programming language or technology stack

• Examples: Angular for front-end web development, Spring for Java applications
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Q2. Explain waits in selenium
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Waits in Selenium are used to make the automation script wait for a certain condition to be met before proceeding.
• Implicit Wait: Waits for a certain amount of time before throwing an exception if the element is not found.

• Explicit Wait: Waits for a certain condition to be met before proceeding.

• Fluent Wait: Waits for a certain condition with a defined polling frequency.
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Q1. What is AWS SQS and
Ans. 
AWS SQS (Simple Queue Service) is a fully managed message queuing service that enables decoupling of components in a distributed system.
• Used for storing messages in a queue before they are processed by a consumer

• Supports distributed systems by enabling asynchronous communication between components

• Helps in decoupling different parts of a system, improving scalability and fault tolerance

• Messages can be stored in SQS for
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Q2. What is the use of Normalizations
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Normalizations are used to standardize data by removing redundancies and inconsistencies.
• Normalizations help in organizing data in a consistent and efficient manner.

• They reduce data redundancy by eliminating duplicate information.

• Normalization ensures data integrity and accuracy by avoiding inconsistencies.

• Examples include normalizing database tables to reduce data duplication and improve query performance.
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Q1. Rolling Sales, YTD, MTD, Calendar Table, Fiscal Year from April
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Q1. SQL- WIndows, CTEs
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Q1. Salary Expectations, WFH options
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Q1. Components of CUCUMBER and what is dryrun in CUCUMBER / basic questions on ur framework
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Q2. How BDD differs from TDD
Ans. 
BDD focuses on behavior and collaboration while TDD focuses on testing and development.
• BDD involves collaboration between developers, testers, and business stakeholders to define behavior in a common language

• TDD involves writing tests before writing code to ensure code meets requirements

• BDD uses scenarios to describe behavior while TDD uses test cases to verify functionality

• BDD is more focused on the end-user experienc...read more
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Q3. Diff between Method Overloading and Method Overriding in JAVA.
Ans. 
Method Overloading is having multiple methods with the same name but different parameters. Method Overriding is having a method in a subclass with the same name and parameters as a method in its superclass.
• Method Overloading is done in the same class while Method Overriding is done in different classes.

• Method Overloading is used to add more behavior to a method while Method Overriding is used to change the behavior of ...read more
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Q4. Explain about OOPS Concept
Ans. 
OOPS is a programming paradigm based on the concept of objects that interact with each other to perform tasks.
• OOPS stands for Object-Oriented Programming System

• It focuses on creating reusable code and organizing it into objects

• It includes concepts like inheritance, encapsulation, polymorphism, and abstraction

• Example: A car object can have properties like color, model, and speed, and methods like start, stop, and accele...read more
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Q5. Why String is Immutable?
Ans. 
String is immutable because it cannot be changed once created.
• String objects are stored in a constant pool, which cannot be modified.

• Any operation on a string creates a new string object.

• This ensures thread safety and prevents unintended changes to the string.

• For example, if a string is used as a key in a map, its immutability guarantees that the key will not change.
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Q6. Can Static method be overload and override?
Ans. 
Yes, static methods can be overloaded but not overridden.
• Overloading is having multiple methods with the same name but different parameters.

• Static methods cannot be overridden as they belong to the class and not the instance.

• Example of overloading: public static void method(int a) and public static void method(int a, int b)
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Q7. Explain about Waits Concepts in Selenium
Ans. 
Waits in Selenium are used to synchronize the test script execution with the application's response.
• Waits are used to handle synchronization issues in Selenium

• There are two types of waits: Implicit and Explicit

• Implicit waits wait for a certain amount of time before throwing an exception

• Explicit waits wait for a certain condition to occur before proceeding with the test script

• Examples of explicit waits include: WebDrive
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Q8. JAVA Program to reverse a String and Repeated number/occurance times.
Ans. 
JAVA program to reverse a String and count repeated occurrences.
• Use StringBuilder to reverse the String.

• Use a HashMap to count the occurrences of each character.

• Iterate through the HashMap to print the repeated characters and their count.
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Q9. What is Application server/ basic SQL questions
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Q10. What are API request methods
Ans. 
API request methods are the actions that can be performed on a web API.
• API request methods include GET, POST, PUT, DELETE, PATCH, and OPTIONS.

• GET is used to retrieve data from the server.

• POST is used to submit data to the server.

• PUT is used to update existing data on the server.

• DELETE is used to delete data from the server.

• PATCH is used to partially update existing data on the server.

• OPTIONS is used to retrieve informa...read more
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Q11. How Query parameter differs fromm Path Parameter?
Ans. 
Query parameters are appended to the end of a URL after a '?' while path parameters are part of the URL path.
• Query parameters are optional and can be used to filter or sort data.

• Path parameters are mandatory and used to identify a specific resource.

• Query parameters are separated by '&' while path parameters are separated by '/'.

• Example of query parameter: www.example.com/search?q=keyword

• Example of path parameter: www.e
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Q12. API response codes that you have frequently faced
Ans. 
Frequently faced API response codes include 200, 400, 401, 404, and 500.
• 200 - OK: Successful request

• 400 - Bad Request: Invalid input or missing parameters

• 401 - Unauthorized: Authentication failure

• 404 - Not Found: Requested resource not found

• 500 - Internal Server Error: Server-side error
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Q13. Basic Authenticationn in API/ Bearer auth
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Q14. How to set the same header name in API

Ans. 

To set the same header name in API, use the 'setHeader' method in the API request.

• Identify the header name that needs to be set.

• Use the 'setHeader' method in the API request to set the header name.

• Pass the header name and value as parameters to the 'setHeader' method.

• Example: request.setHeader('Authorization', 'Bearer ')

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