20+ Associate Technical Leader Interview Questions and Answers

My current CTC is $80,000 and my expected CTC is $90,000.

• Current CTC: $80,000

• Expected CTC: $90,000

Challenges and steps during browser migration from IE to Edge and Chrome in Active Queue project

• Compatibility issues with existing code and plugins

• Training users on new browser features and interface

• Testing and debugging to ensure smooth transition

• Updating documentation and support materials

• Coordinating with IT department for deployment

• Providing technical support during and after migration

• Example: Updating Active Queue's web application to support Edge and Chrome

• Example: Cond...read more

Understanding complex queries in one-to-many relationships is crucial for effective database management.

• Identify the primary and foreign keys in the tables involved.

• Use JOIN clauses to connect the tables, e.g., SELECT * FROM Orders JOIN Customers ON Orders.CustomerID = Customers.CustomerID.

• Utilize aggregate functions like COUNT, SUM, or AVG to summarize data from the 'many' side.

• Consider using subqueries for more complex filtering, e.g., SELECT * FROM Customers WHERE Customer...read more

Use dynamic element locators and API integration to apply changes to dynamic elements on a page.

• Identify the dynamic element using unique attributes

• Use dynamic element locators like XPath, CSS selectors, etc.

• Use API integration to fetch the updated element data

• Apply the changes to the dynamic element using appropriate methods

• Test the changes thoroughly to ensure functionality

• Examples: Selenium WebDriver with dynamic locators, jQuery AJAX calls for API integration

Monolithic architecture is a single-tiered software application while microservices architecture is a collection of small, independent services.

• Monolithic architecture is a single, indivisible unit where all components are tightly coupled.

• Microservices architecture breaks down the application into smaller, loosely coupled services that communicate through APIs.

• Monolithic architecture is easier to develop and test but harder to scale and maintain.

• Microservices architecture all...read more

Implement a function to find the maximum value in an array of integers.

• Define a function named 'findMax' that takes an array as input.

• Initialize a variable 'maxValue' to the first element of the array.

• Iterate through the array using a loop to compare each element with 'maxValue'.

• If an element is greater than 'maxValue', update 'maxValue'.

• Return 'maxValue' after the loop ends.

Creating test cases involves understanding requirements, defining scenarios, and ensuring coverage for expected outcomes.

• Identify the requirement clearly. Example: 'User should be able to log in with valid credentials.'

• Define positive test cases. Example: 'Test login with valid username and password.'

• Define negative test cases. Example: 'Test login with invalid username or password.'

• Consider edge cases. Example: 'Test login with empty username or password fields.'

• Ensure test ...read more

Class components are based on ES6 classes and have lifecycle methods, while hooks are functions that allow state and other React features to be used in functional components.

• Class components have a render method, while functional components use a return statement.

• Hooks allow functional components to use state and lifecycle methods.

• Class components can have state and use lifecycle methods like componentDidMount, componentDidUpdate, and componentWillUnmount.

• Hooks like useState ...read more

first() returns the first element of a sequence, while FirstOrDefault() returns the first element or a default value if the sequence is empty.

• first() throws an exception if the sequence is empty, while FirstOrDefault() returns a default value (e.g. null) in that case.

• Use first() when you expect the sequence to always have at least one element, and FirstOrDefault() when the sequence might be empty.

• Example: var numbers = new List(); var firstNumber = numbers.first(); // Throws ...read more

Repository pattern using EF core for data access layer

• Create an interface for the repository with generic CRUD methods

• Implement the repository interface with EF core for data access

• Use dependency injection to inject the repository into services

• Separate concerns by having repositories handle data access logic

Responsibilities of a QA include testing software, identifying bugs, creating test cases, and ensuring quality standards are met.

• Testing software to identify bugs and defects

• Creating and executing test cases

• Ensuring quality standards are met

• Collaborating with developers to resolve issues

• Providing feedback on usability and functionality

• Participating in the software development lifecycle

Middlewares are software components that act as a bridge between different applications or systems, allowing them to communicate and share data.

• Middlewares help in handling requests, responses, and processing data between different layers of an application.

• They can be used for authentication, logging, error handling, and other common functionalities.

• Examples include Express.js middleware in Node.js applications, Django middleware in Python web frameworks, and Redux middleware...read more

Breaking UI into components is a process of dividing a UI into smaller, reusable parts.

• Identify the UI elements that can be reused

• Create separate components for each element

• Ensure each component is independent and can be used in different parts of the UI

• Use a component library to manage and reuse components

• Examples: buttons, forms, navigation bars, etc.

Priority refers to the order in which issues should be addressed, while severity refers to the impact of an issue on the system or users.

• Priority determines the order in which issues should be resolved, based on factors like deadlines and business impact.

• Severity indicates the impact of an issue on the system or users, ranging from low to critical.

• For example, a low priority issue with high severity may need to be addressed sooner than a high priority issue with low severity.

Left join includes all records from the left table and matching records from the right table, while right join includes all records from the right table and matching records from the left table.

• Left join: includes all records from the left table and matching records from the right table

• Right join: includes all records from the right table and matching records from the left table

• Example: Left join - SELECT * FROM table1 LEFT JOIN table2 ON table1.id = table2.id

• Example: Right j...read more

Optimizing SQL queries involves using indexes, minimizing joins, and avoiding unnecessary columns.

• Use indexes on columns frequently used in WHERE clauses

• Minimize the use of JOIN operations

• Avoid selecting unnecessary columns in the query

• Consider using stored procedures for frequently executed queries

Props are read-only data passed from parent component to child component, while state is mutable data managed within a component.

• Props are used to pass data from parent to child components

• Props are read-only and cannot be modified by the child component

• State is used to manage mutable data within a component

• State can be updated using setState() method

• State should be used sparingly and only for data that affects the component's rendering

Ansible script to automate tasks

• Use YAML syntax to define tasks and playbooks

• Utilize Ansible modules for different operations

• Define hosts and groups in inventory file

• Use variables and templates for dynamic configurations

Multithreading is the ability of a CPU to execute multiple threads concurrently, allowing for better performance and responsiveness.

• Multithreading allows multiple tasks to be executed simultaneously on a single CPU core.

• Each thread has its own set of registers and stack, but shares the same memory space.

• Threads can communicate with each other through shared memory or synchronization mechanisms like mutexes and semaphores.

• Example: A web server handling multiple client requests...read more

Rotate a 2D matrix by 90 degrees clockwise

• Transpose the matrix (swap rows with columns)

• Reverse each row to get the final rotated matrix