D&K Technologies Interview Questions and Answers

Q1. What is csrf token
Ans. 
A CSRF token is a security measure to prevent unauthorized actions on behalf of authenticated users in web applications.
• CSRF stands for Cross-Site Request Forgery.

• It protects against attacks where unauthorized commands are transmitted from a user that the web application trusts.

• A CSRF token is a unique, secret, and unpredictable value generated by the server and sent to the client.

• The token is included in forms or AJAX...read more
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Q2. What is ORM
Ans. 
ORM (Object-Relational Mapping) is a programming technique for converting data between incompatible type systems using objects.
• ORM allows developers to interact with databases using Python objects instead of SQL queries.

• Popular ORM libraries in Python include SQLAlchemy and Django ORM.

• Example: Using Django ORM, you can create a new user with 'User.objects.create(username='john')'.

• ORM abstracts database interactions, ma...read more
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Mathematical question , grammatical question

Q1. What is oops and why we use it in java?
Ans. 
OOPs stands for Object-Oriented Programming. It is used in Java to organize code into objects for better reusability, maintainability, and scalability.
• OOPs allows for the creation of classes and objects, which encapsulate data and behavior together.

• It promotes concepts like inheritance, polymorphism, encapsulation, and abstraction.

• Using OOPs in Java leads to modular and organized code, making it easier to understand an...read more
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Q2. What are the access modifiers in java , why we use them?
Ans. 
Access modifiers in Java control the visibility and accessibility of classes, methods, and variables.
• Access modifiers include public, private, protected, and default (no modifier).

• Public - accessible from any other class.

• Private - only accessible within the same class.

• Protected - accessible within the same package and subclasses.

• Default - accessible only within the same package.

• Access modifiers help in encapsulation, d
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Q1. Introduce yourself?
Ans. 
Experienced Java Developer with 5+ years of industry experience in developing web applications and software solutions.
• 5+ years of experience in Java development

• Strong knowledge of web application development

• Proficient in software solution design

• Familiar with Agile methodologies

• Excellent problem-solving skills
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Q2. Tell me about your project?
Ans. 
Developed a web application for online shopping with user authentication and payment gateway integration.
• Used Java Spring framework for backend development

• Implemented RESTful APIs for communication between frontend and backend

• Integrated Stripe API for secure payment processing
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Q1. What is react and define react components
Ans. 
React is a JavaScript library for building user interfaces. React components are reusable, self-contained building blocks of a UI.
• React is a JavaScript library for creating interactive UIs

• React components are reusable and self-contained

• Components can be nested within each other to create complex UI structures

• Components can have their own state and lifecycle methods

• React uses a virtual DOM to efficiently update the UI
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Q2. What is Hooks in react
Ans. 
Hooks in React are functions that allow you to use state and other React features in functional components.
• Hooks are introduced in React 16.8 as a way to write reusable logic in functional components.

• They allow you to use state and other React features without writing a class.

• Hooks provide a way to break down complex components into smaller, reusable functions.

• Some commonly used hooks are useState, useEffect, useContex...read more
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Q3. Define props and its use
Ans. 
Props are used in React to pass data from a parent component to a child component.
• Props are read-only and cannot be modified by the child component

• Props are passed as attributes to the child component in JSX

• Props can be any type of data, including strings, numbers, objects, or even functions

• Props can be used to customize the behavior or appearance of a component

• Props can be accessed in the child component using the 'pr
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Q4. Why did you choose this company
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Q5. Hshs hshsh hshshs hshshs shshhs
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