Dev Information Technology Reactjs Developer Interview Questions and Answers

Q1. Introduce yourself
Ans. 
I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Strong problem-solving skills

• Experience working in Agile development environment
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Q2. What is React and react native
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React is a JavaScript library for building user interfaces, while React Native is a framework for building mobile applications using React.
• React is a JavaScript library developed by Facebook for building interactive user interfaces.

• React Native is a framework that allows developers to build mobile applications using React.

• React uses a virtual DOM to improve performance by updating only the necessary components.

• React Na...read more
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Q1. About yourself and background only
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I applied in campus placement first round is aptitude test

Q1. Ask question on oops concepts
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Q2. What ia polymorphism Pointers etc.
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is called with.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Animal class with methods eat() and sleep(). Dog and Cat classes can inherit from Animal and override
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Q3. Asked about academic project what is your role on these project
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Q4. Based on resume asked questions and mostly asked the oops and c++ concept
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Q1. Based on resume and asked weakness ,strength
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Some questions about specific puthon types etc...

Q1. Why i want to move on
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Q2. What i like at my future job
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I was given a problem statement and was asked to give a LLD and solution implementation and share it on Git.

Q1. Explain the LLD submitted.
Ans. 
The LLD submitted is a detailed design document outlining the architecture and implementation details of the software solution.
• LLD stands for Low Level Design and includes detailed design diagrams, data structures, algorithms, and component interactions.

• The LLD submitted should provide a clear roadmap for developers to implement the software solution based on the high-level design.

• It should cover all aspects of the sof...read more
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Q2. How to add more features in the solution
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To add more features in the solution, consider user feedback, market trends, and technical feasibility.
• Gather user feedback to understand what features are desired

• Research market trends to identify popular features

• Assess technical feasibility to determine if new features can be implemented

• Prioritize features based on impact and resources available
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Q3. SOLID principles, Degin patterns
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Q1. This was a manegerial round.
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Q1. Salary discussion
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Round duration - 90 minutes
Round difficulty - Medium

Q1. Cycle Detection in a Singly Linked List
You have given a Singly Linked List of integers, determine if it forms a cycle or not.
A cycle occurs when a node's next points back to a previous node in the ...read more
Ans. 
The task is to determine if a given singly linked list forms a cycle or not.
• A cycle occurs when a node's next points back to a previous node in the list.

• To solve this problem, we can use the Floyd's Cycle-Finding Algorithm.

• The algorithm uses two pointers, one moving at a normal pace and the other moving twice as fast.

• If there is a cycle, the fast pointer will eventually catch up to the slow pointer.

• If the fast pointer ...read more
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Round duration - 60 minutes
Round difficulty - Medium

Q1. Minimum Depth Of Binary Tree
You have been given a Binary Tree of integers, find the minimum depth of this Binary Tree. The minimum depth of a Binary Tree is the number of nodes along the shortest path fro...read more
Ans. 
The minimum depth of a binary tree is the number of nodes along the shortest path from the root node down to the nearest leaf node.
• The minimum depth can be found by performing a breadth-first search (BFS) traversal of the binary tree

• During the BFS traversal, keep track of the current level and increment the depth by 1 for each level

• Stop the BFS traversal when a leaf node is encountered and return the depth as the minim
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Q2. Intersection Of Two Arrays
You are given two arrays 'A' and 'B' of size 'N' and 'M' respectively. Both these arrays are sorted in non-decreasing order. You have to find the ...read more
Ans. 
The problem is to find the intersection of two sorted arrays.
• Use two pointers to iterate through the arrays.

• Compare the elements at the current pointers and move the pointers accordingly.

• If the elements are equal, add it to the intersection array and move both pointers.

• If the element in the first array is smaller, move the first pointer.

• If the element in the second array is smaller, move the second pointer.

• Repeat until...read more
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Q3. Operating System Question
What is the difference between a mutex and a semaphore
Ans. 
A mutex is a binary semaphore used for mutual exclusion, while a semaphore is a generalized synchronization primitive.
• Mutex is used to protect a critical section of code, allowing only one thread to access it at a time.

• Semaphore is used to control access to a shared resource, allowing multiple threads to access it simultaneously.

• Mutex has ownership, meaning the thread that locks it must unlock it.

• Semaphore does not hav...read more
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Round duration - 60 minutes
Round difficulty - Easy

Q1. Technical Questions
It was a managerial round. The interviewer started by introducing himself and then asked for my introduction. We then had an in-depth discussion on Cloud Computing, its importance and di...read more
Ans. 
The interviewer asked about Cloud Computing, OSI layers, network security, and security protocols.
• Discussed the importance of Cloud Computing

• Talked about the different OSI layers

• Explored the significance of network security in today's world

• Discussed various security protocols in place

• Had a healthy and friendly discussion
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Round duration - 25 minutes
Round difficulty - Easy

Q1. Basic HR questions
The interviewer introduced himself and then asked for my introduction. He then asked me why I wanted to join F5 networks and why they should hire me. He then told me in-depth about the co...read more
Ans. 
I wanted to join F5 networks because of their strong reputation in the industry and their commitment to innovation and customer satisfaction.
• I am impressed by F5 networks' track record of delivering cutting-edge solutions to their clients.

• I believe my skills and experience align well with the company's goals and values.

• F5 networks' focus on customer satisfaction resonates with my own commitment to providing excellent s...read more
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Q1. What are design patterns
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Design patterns are reusable solutions to common software design problems.
• Design patterns provide proven solutions to recurring design problems in software development.

• They help in creating flexible, maintainable, and scalable software.

• Design patterns can be categorized into three types: creational, structural, and behavioral.

• Examples of design patterns include Singleton, Observer, Factory Method, and Strategy.

• They pro...read more
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