Informatica QA Test Engineer Interview Questions, Process, and Tips

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

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

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

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.

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)

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

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.

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

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

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

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 ')

Postman allows logging of request and response through its console feature.

• Postman's console feature allows logging of request and response data

• To enable logging, go to the console tab and select 'All' from the dropdown menu

• The console displays the request and response data along with other details like headers and status codes

CURL is a command-line tool used to transfer data to or from a server using various protocols.

• CURL stands for 'Client URL'

• It supports various protocols like HTTP, FTP, SMTP, etc.

• It can be used to send requests and receive responses from a server

• It can be used to test APIs and web services

• Example: curl https://www.example.com -v

Random and dynamic data requests are requests for data that is not predetermined or fixed.

• Random data requests are requests for data that is not predetermined or fixed.

• Dynamic data requests are requests for data that changes frequently.

• Examples of random and dynamic data requests include user input, sensor data, and API responses.

JAVA program to reverse a string and repeated occurrence with and without loops

• Use StringBuilder class to reverse the string without loops

• Use for loop to reverse the string with loops

• Use HashMap to count the occurrence of each character

• Use LinkedHashMap to maintain the order of occurrence