JK Tech Technical Lead Interview Questions and Answers

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Q1. What is object oriented programming
Ans. 
Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• OOP focuses on creating objects that interact with each other to solve problems

• Encapsulation, inheritance, and polymorphism are key principles of OOP

• Examples of OOP languages include Java, C++, and Python
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Q2. Questions on data structute
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Q1. About batch processing
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Q2. About exception handling
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Q1. About project discussion in details
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Q2. Aws services mainly
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Q1. Handling a team
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Q2. Micro service architecture
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Q1. About personal things
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Q2. About financial thing
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Q1. Cisco Servers Installation
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Q2. HPe servers installation
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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) ?
Ans. 
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 features of OOPS
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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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