Carwale Full Stack Developer Interview Questions and Answers

Q1. Web development
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Q2. What is useref in react
Ans. 
useRef is a hook in React that allows you to create a mutable ref object.
• useRef is used to access DOM nodes or store mutable values that persist across renders.

• It can be used to focus an input field, measure the size of an element, or store previous values.

• Example: const inputRef = useRef(null);
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Q1. React in deep and project
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React is a JavaScript library for building user interfaces, commonly used in web development projects.
• React is a declarative, efficient, and flexible JavaScript library for building user interfaces.

• It allows developers to create reusable UI components that can be easily composed to build complex user interfaces.

• React uses a virtual DOM to improve performance by only updating the parts of the actual DOM that have change...read more
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Q1. Tell me about yourself
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Q1. Asked for experience and background
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Q1. Technical questions
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Prectical test on relevant experience and position requirements.

Q1. Salary discussion and all
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Q 1 print string in tringal farmat
Q2 print duplicate string in two array

Q1. About core java over all
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Q1. Difference between exe and dll
Ans. 
Exe is an executable file that can be run independently, while DLL is a dynamic link library that is loaded by programs when needed.
• Exe stands for executable file, while DLL stands for dynamic link library.

• Exe files can be run independently, while DLL files are loaded by programs when needed.

• Exe files have their own memory space, while DLL files share memory space with the calling process.

• Exe files are typically larger...read more
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Q2. What are http verbs
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HTTP verbs are used to indicate the action to be performed on a resource in a RESTful API.
• GET - retrieve data from a server

• POST - send data to a server to create/update a resource

• PUT - update a resource on the server

• DELETE - remove a resource from the server

• PATCH - partially update a resource on the server
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Q3. What is method overloading and overriding Output based question
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Q4. Linq query to filter data and group by
Ans. 
Use Linq query to filter data and group by in C#
• Use 'Where' method to filter data based on a condition

• Use 'GroupBy' method to group the filtered data based on a key

• Example: var result = data.Where(x => x.Property == value).GroupBy(x => x.GroupKey)
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Q5. Attribute in mvc
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An attribute in MVC is a piece of metadata that provides additional information about a model, view, or controller.
• Attributes are used to add behavior or data to a class or method in MVC

• They can be used for validation, authorization, caching, etc.

• Examples include [Required], [Authorize], [OutputCache]
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Machine coding round

Q1. Explain your project
Ans. 
Developed a web application for managing inventory and sales for a retail store
• Used React.js for front-end development

• Implemented Node.js for back-end functionality

• Utilized MongoDB for database management
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Q2. Tell me about yourself
Ans. 
I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
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Basic aptitude with tracing program

3 problem with easy to hard