ZenQ Senior Test Engineer Interview Questions and Answers for Experienced

Q1. All about angular basic and deep questioning
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Q1. Basic routing and SPA
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Q1. Detail qbout angular and node js
Ans. 
Angular is a front-end framework while Node.js is a back-end runtime environment.
• Angular is used for building dynamic web applications with a focus on the client-side.

• Node.js is used for building server-side applications with JavaScript.

• Angular uses TypeScript for building applications while Node.js uses JavaScript.

• Angular has a large community and a lot of pre-built components while Node.js has a vast library of modul...read more
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Q1. Salary discussion as per interview
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Q1. OOPS cocept,mvc,core,api
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Q2. Oops concept,mvc,core,api
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Q1. Oops concept,mvc,web api,project description
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Q1. Explain the Lifecycle of MVC and the deployment process.
Ans. 
MVC lifecycle involves Model, View, and Controller interactions, while deployment ensures the application is live and accessible.
• 1. Model: Represents data and business logic. Example: A User model that interacts with a database.

• 2. View: Displays data to the user. Example: HTML templates rendering user information.

• 3. Controller: Handles user input and updates the model. Example: A login controller processing user creden...read more
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Q2. What is CTE and syntax of same ?
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CTE stands for Common Table Expression, a temporary result set in SQL used for complex queries.
• CTE is defined using the WITH clause.

• It can be recursive or non-recursive.

• Example syntax: WITH CTE_Name AS (SELECT column1 FROM table) SELECT * FROM CTE_Name;

• CTEs improve readability and organization of SQL queries.

• They can be referenced multiple times within a query.
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Q3. What is CORS (Cross Origin Resource Sharing) ?
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CORS is a security feature that allows restricted resources on a web page to be requested from another domain outside the domain from which the resource originated.
• CORS is implemented via HTTP headers that allow servers to specify who can access their resources.

• For example, a web application on 'example.com' can request resources from 'api.example.com' if CORS is enabled.

• The 'Access-Control-Allow-Origin' header is cruc...read more
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Q4. What is Bundling and Minification ?
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Bundling and minification optimize web assets by reducing file size and number of requests, improving load times and performance.
• Bundling combines multiple files (e.g., JavaScript, CSS) into a single file to reduce HTTP requests.

• Minification removes unnecessary characters (like whitespace and comments) from code to decrease file size.

• Example of bundling: Combining 'script1.js', 'script2.js', and 'script3.js' into 'bund...read more
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Q5. What is HTML helper ?
Ans. 
HTML helpers are functions that simplify the generation of HTML markup in web applications, enhancing code readability and maintainability.
• HTML helpers are often used in MVC frameworks to generate HTML elements easily.

• Common HTML helpers include methods for creating forms, links, and other UI components.

• Example: In ASP.NET MVC, Html.TextBoxFor() generates an input element for a model property.

• HTML helpers promote DRY (...read more
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Q1. What are Promises
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used in JavaScript to handle asynchronous operations.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: Fetching data from an API returns a Promise that resolves with the data or rejects with an erro
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Q2. Is Node.js Single Threaded or Multiple Threaded
Ans. 
Node.js is single threaded, but uses multiple threads for I/O operations.
• Node.js uses a single thread to handle all JavaScript code execution.

• It uses multiple threads from a thread pool to handle I/O operations asynchronously.

• This allows Node.js to handle high concurrency without blocking the main thread.

• Example: When reading a file, Node.js will use a separate thread from the pool to perform the I/O operation.
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Reverse the Array of Strings

Q1. What are features of OOPS
Ans. 
OOPS features include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability to create new classes based on existing classes, inheriting their attributes and methods.

• Polymorphism: Ability to use a single interface for different data types or classes.

• Abstraction: Hiding the implementation details and show
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Q2. Difference between interface and abstract clas
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Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.
• Interface methods are public and abstract by default, while abstract class can have abstract and non-abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used for full abstraction, while abstract classes are used fo...read more
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Q1. There were multiple questions on azure cloud and projects i worked on
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Q2. Sql queries and scenario based azure questions
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