Octillion Power Systems QA QC Engineer Interview Questions and Answers for Experienced

An API (Application Programming Interface) is a set of rules and protocols that allows different software applications to communicate with each other.

• APIs define the methods and data formats that applications can use to request and exchange information.

• They allow developers to access the functionality of a software application or service without needing to understand its internal workings.

• Examples of APIs include Googl...read more

HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap is part of the Java Collections framework.

• It uses hashing to store key-value pairs in an array.

• It allows for quick retrieval of values based on keys.

• Example: HashMap map = new HashMap<>();

OOPS concepts refer to Object-Oriented Programming concepts which include principles like inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the comple...read more

MW stands for molecular weight while UBR stands for ultimate bearing resistance.

• MW is a measure of the average mass of molecules in a sample, while UBR is the maximum load a structure can withstand before failure.

• MW is commonly used in chemistry to determine the size of molecules, while UBR is important in engineering for designing structures.

• Examples: The MW of water is approximately 18 g/mol, while the UBR of a steel...read more

Different ways to locate elements in a web page include using XPath, CSS selectors, ID, class name, tag name, and link text.

• XPath: Allows you to navigate through the HTML structure of a web page.

• CSS selectors: Can be used to target specific elements based on their attributes.

• ID: Unique identifier for an element on a web page.

• Class name: Used to group elements with similar styling.

• Tag name: Targets elements based on the...read more

Working with lists in Selenium involves locating elements, storing them in a list, and performing actions on them.

• Locate elements using findElements() method

• Store elements in a List

• Iterate through the list to perform actions on each element

• Example: List elements = driver.findElements(By.xpath("//ul/li"));