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CollegeDekho React Js Frontend Developer Interview Questions and Answers
CollegeDekho React Js Frontend Developer Interview Experiences
1 interview found
Anonymous
Selected
I applied via LinkedIn and was interviewed in Jan 2023. There were 3 interview rounds.
DSA, React, JavaScript, Rest API, Redux, VUE js,
(2 Questions)
- Q1. What is virtual DOM?
- Ans.
Virtual DOM is a lightweight copy of the actual DOM used for efficient updates.
Virtual DOM is a concept used in React to improve performance.
It is a lightweight copy of the actual DOM.
It is used to minimize the number of updates needed to be made to the actual DOM.
When a change is made to the virtual DOM, React compares it with the previous version and only updates the necessary changes to the actual DOM.
This results i...
- Q2. What is Redux?How to implement Redux?
- Ans.
Redux is a predictable state container for JavaScript apps.
Redux is a state management library for JavaScript applications.
It helps in managing the state of an application in a predictable way.
Redux follows a unidirectional data flow pattern.
To implement Redux, we need to define actions, reducers, and a store.
Actions are plain JavaScript objects that describe what happened.
Reducers specify how the application's state c...
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I was interviewed in Aug 2022.
2 hrs duration with 2 easy level dsa questions and 15 around mcqs based on core cs concepts.
(2 Questions)
- Q1. Implement stack using linked list.
- Ans.
Implementing stack using linked list
Create a Node class with data and next pointer
Create a Stack class with top pointer
Implement push() method to add element to top of stack
Implement pop() method to remove element from top of stack
Implement peek() method to return top element without removing it
- Q2. Print first duplicate value in a string.
- Ans.
Find the first duplicate value in an array of strings.
Create a hash table to store the frequency of each string.
Iterate through the array and check if the string already exists in the hash table.
If it does, return the string. If not, add it to the hash table.
If no duplicates are found, return null or an appropriate message.
Interview Preparation Tips
Can do Blind 75 for practice.
Skills evaluated in this interview
(1 Question)
- Q1. Sdlc lifecycle of components and architecture.
- Ans.
SDLC lifecycle involves planning, designing, developing, testing, deploying, and maintaining software components and architecture.
SDLC (Software Development Life Cycle) includes phases like planning, designing, coding, testing, and maintenance.
Components are designed, developed, tested, and integrated into the overall architecture.
Architecture involves defining the structure, behavior, and interactions of software comp...
(1 Question)
- Q1. Role and responsibility my tasks and questions on project
Skills evaluated in this interview
Vimal
(1 Question)
- Q1. About Lighnting Web componet
Selected
I applied via Job Fair and was interviewed before Nov 2023. There were 3 interview rounds.
3 coding question around prime number arrays and strings
(2 Questions)
- Q1. Introduce youself
- Q2. Question around project and skill in the resume and one coding question to solve
(2 Questions)
- Q1. Question on project and skill in resume
- Q2. 2 question arouond data structer and algorithm
Selected
I applied via Naukri.com and was interviewed in Jan 2023. There were 3 interview rounds.
Aptitude test was first round. it was hard level
Program on string, oops , exception handling
Interview Preparation Tips
Hard test dsa question practice more leetcode
(1 Question)
- Q1. Dsa question Array Powershell scripting Cpp Python
sanjay singh
Selected
I was interviewed in Oct 2024.
Explain about DSA and its example in realtime.
I applied via LinkedIn and was interviewed in Feb 2023. There were 6 interview rounds.
(1 Question)
- Q1. Data structures
(1 Question)
- Q1. System Design fundamentals
(1 Question)
- Q1. System Design questions
(1 Question)
- Q1. What do you think about the negative news going around the company
(1 Question)
- Q1. Why join this company
Interview Preparation Tips
After taking 5 rounds, they have the audacity of not even calling back, picking up the calls or providing us with any information. If you are not interested in taking the candidate then why waste their time?
Funniest part is that they are fully aware of what a rubbish organization it is. In the later rounds they talked about cost cutting, negative news around the company, and employee complaints for work life balance. However, they are great at gaslighting as well because they make these sound like employee problems not employer problems.
I applied via Naukri.com and was interviewed before Aug 2023. There was 1 interview round.
(2 Questions)
- Q1. Explain about Android lifecycle
- Ans.
Android lifecycle refers to the series of states that an activity or fragment goes through from creation to destruction.
Android lifecycle includes states like onCreate, onStart, onResume, onPause, onStop, onDestroy, etc.
Activities and fragments transition between these states based on user interactions and system events.
Understanding Android lifecycle is crucial for managing resources, saving state, and handling config...
- Q2. Explain about fragment lifecycle
- Ans.
Fragment lifecycle refers to the series of events that occur in the lifespan of a fragment in an Android app.
Fragments go through various states like created, started, resumed, paused, stopped, and destroyed.
Fragment lifecycle methods include onCreate(), onCreateView(), onResume(), onPause(), onStop(), onDestroy(), etc.
Fragment lifecycle is closely tied to the hosting activity's lifecycle.
Understanding fragment lifecyc...
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