Softcrylic Technology Solutions Reactjs Developer Interview Questions and Answers

Q1. Custom hook implementation
Ans. 
Custom hooks in React are reusable functions that contain logic shared between components.
• Custom hooks start with 'use' keyword (e.g. useState, useEffect)

• They can be used to share logic like fetching data, managing state, or subscribing to events

• Example: Custom hook for fetching data from an API can be used in multiple components
Answered by AI
Add your answer

Q1. How would you utilize AWS or Azure services to create scalable web applications
Ans. 
Utilize AWS or Azure services for scalable web applications
• Use AWS Elastic Beanstalk or Azure App Service for easy deployment and scaling

• Leverage AWS Lambda or Azure Functions for serverless computing

• Utilize AWS Auto Scaling or Azure Autoscale to automatically adjust resources based on traffic

• Store data in AWS RDS or Azure SQL Database for scalable database solutions

• Use AWS CloudFront or Azure CDN for content delivery
Answered by AI
Add your answer
Q2. How would you tackle memory leaks if the system your working on was experiencing this issue?
Ans. 
I would use memory profiling tools to identify the source of the leaks and then fix them by properly managing memory allocation and deallocation.
• Use memory profiling tools like Valgrind or Instruments to identify the source of the leaks

• Review the code to ensure proper memory allocation and deallocation practices are being followed

• Implement smart pointers or garbage collection to automatically manage memory

• Use static co...read more
Answered by AI
Add your answer
Q3. Have you worked on legacy systems?
Ans. 
Yes, I have experience working on legacy systems.
• I have successfully maintained and upgraded legacy systems to meet current business needs.

• I have refactored legacy code to improve performance and scalability.

• I have integrated new technologies with legacy systems to enhance functionality.

• I have experience troubleshooting and debugging issues in legacy systems.
Answered by AI
Add your answer

Q1. Are you capable to work with cross functional teams and handle disputes effectively
Ans. 
Yes, I have experience working with cross functional teams and resolving disputes effectively.
• I have successfully collaborated with team members from different departments to achieve project goals.

• I am skilled at mediating conflicts and finding mutually beneficial solutions.

• I prioritize open communication and actively listen to all team members' perspectives.

• I have experience using conflict resolution techniques such a
Answered by AI
Add your answer

Q1. Number series in aptitude
Ans. 
Number series in aptitude involves identifying the pattern in a sequence of numbers and predicting the next number.
• Look for patterns such as arithmetic progression, geometric progression, or a combination of both.

• Check for alternate numbers, differences between consecutive numbers, or multiplication factors.

• Consider prime numbers, squares, cubes, or other mathematical operations applied to the series.

• Example: 2, 4, 6, ...read more
Answered by AI
Add your answer
Q2. Relation ships in berbal
Ans. 
Relationships in verbal communication are crucial for effective collaboration and understanding.
• Verbal communication involves both verbal and non-verbal cues

• Active listening is key to building strong relationships in verbal communication

• Clarity and conciseness in speech can enhance relationships

• Empathy and understanding of others' perspectives are important in verbal relationships
Answered by AI
Add your answer

Q1. Explain the four branches of oops
Ans. 
The four branches of OOP are encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same method call.

• Abstraction: Hiding the complex implementation details and showing only
Answered by AI
Add your answer
Q2. Explain about the structures in c
Ans. 
Structures in C are user-defined data types that allow grouping of variables of different data types under a single name.
• Structures are used to represent a record which consists of different data types.

• They are defined using the 'struct' keyword.

• Each variable in a structure is called a member.

• Structures can be nested within other structures.

• Example: struct employee { int emp_id; char emp_name[50]; float emp_salary; };

• E
Answered by AI
Add your answer

Q1. What is the difference between an abstract class and an interface in object-oriented programming?
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have method implementations, while interface cannot.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Interfaces are used to define contracts for classes to implement, while abstract classes are used to provide a common base for subclasses.

• Example: Abstr...read more
Answered by AI
Add your answer
Q2. Abstract classes can have implemented methods; interfaces can only have declarations (before JAVA 8).
Add your answer

Q1. What is hoisting
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variable declarations are hoisted to the top of their scope but not their initializations.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
Answered by AI
Add your answer
Q2. What is throttling
Ans. 
Throttling is a technique used to control the rate at which a function is executed.
• Throttling limits the number of times a function can be called over a specified period of time.

• It helps in optimizing performance by preventing excessive function calls, especially in scenarios like scroll events or API requests.

• Example: Throttling can be used to limit the rate at which a user can resize a window, ensuring smoother perfo
Answered by AI
Add your answer
Q3. What is debouncing
Ans. 
Debouncing is a technique used to limit the number of times a function is called in a short period of time.
• Debouncing is often used in scenarios like search bars where you want to wait for the user to finish typing before making an API call.

• It involves setting a delay before executing a function after the last time it was called.

• Debouncing helps in optimizing performance by reducing unnecessary function calls.

• Example: ...read more
Answered by AI
Add your answer
Q4. What is event coupling
Ans. 
Event coupling is the dependency between different parts of a system based on events.
• Event coupling occurs when one component triggers an event that another component listens for.

• It can lead to tight coupling between components, making the system harder to maintain.

• Reducing event coupling can be achieved by using a centralized event bus or implementing a pub/sub pattern.

• Example: A button click event in a UI component t
Answered by AI
Add your answer
Q5. Remove duplicates from array
Ans. 
Use Set to remove duplicates from array of strings
• Create a Set from the array to automatically remove duplicates

• Convert the Set back to an array to get unique values

• Example: const arr = ['apple', 'banana', 'apple', 'orange']; const uniqueArr = [...new Set(arr)];
Answered by AI
Add your answer
Q6. Reverse a Linked List
Ans. 
Reverse a linked list by changing the direction of pointers
• Create three pointers: prev, current, next

• Iterate through the linked list, updating pointers to reverse the direction

• Return the new head of the reversed linked list
Answered by AI
Add your answer
Q7. Explain closure function with an example
Ans. 
Closure function is a function defined inside another function, with access to the outer function's variables.
• Closure functions have access to the outer function's variables even after the outer function has finished executing.

• They can be used to create private variables and functions in JavaScript.

• Example: function outerFunction() { let outerVar = 'I am outer'; function innerFunction() { console.log(outerVar); } retur
Answered by AI
Add your answer

Questions on string and arrays both are moderate level questions on hacherrank type for 20 marks

Q1. Constructor chaining
Add your answer
Q2. Hasmap and treemap
Add your answer

Q1. 3 Question was there related to architecture and Computer networks.
Add your answer

Q1. Microservices and Monolith.
Add your answer
Q2. Leetcode hard Sum.
Add your answer

Aptitude questions with some basic coding questions

They have given 3 coding questions and some pseudo codings

Q1. Tell about your self
Add your answer
Q2. Some coding questions
Add your answer