Sfc Solutions Senior Engineer Interview Questions and Answers

Discussion on the changes in tecehnology

Test followed by the questions and scenario based questions

Hacker Rank test with medium difficulty

Q1. Technical discussion mainly around system design, different architectures, problem solving and coding question may be asked.
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A case study for a problem statement

One question relates to Linked list and another related to string

Q1. Circular linked list algorithm
Ans. 
Circular linked list is a data structure where the last node points back to the first node.
• In a circular linked list, each node has a pointer to the next node and the last node points back to the first node.

• Traversal in a circular linked list can start from any node and continue until the starting node is reached again.

• Insertion and deletion operations in a circular linked list are similar to those in a regular linked ...read more
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Q2. String manipulation and logical questioning
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Q3. String creation and deletion
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Q4. DSA problem solving questions
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Q5. Logical questions asked and informed
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Q1. Asked to write a program to check whether string is valid or not. String consists of only three kind of special characters "(), [], {}". We need to return true if all special characters are in correct for...read more
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Q2. What is useRef hook used for?
Ans. 
useRef hook is used to persist a mutable value across renders without causing a re-render.
• Used to store mutable values that do not trigger re-renders.

• Commonly used for accessing DOM elements or storing previous values.

• Does not cause a re-render when the value changes.
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Q3. What are the best practices to avoid rerenders and to improve performance
Ans. 
Use memoization, virtual DOM, and shouldComponentUpdate to avoid unnecessary rerenders and improve performance.
• Implement memoization to store the result of expensive function calls and avoid recalculating them.

• Use virtual DOM to efficiently update only the parts of the UI that have changed.

• Override shouldComponentUpdate to prevent unnecessary rerenders by comparing current and next props/state.
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Q4. What are callbacks, Promises, async await
Ans. 
Callbacks, Promises, async await are asynchronous programming concepts in JavaScript.
• Callbacks are functions passed as arguments to another function to be executed later.

• Promises are objects representing the eventual completion or failure of an asynchronous operation.

• async await is a syntax for writing asynchronous code that looks synchronous, making it easier to read and maintain.

• Example: Using a callback to handle th...read more
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Q1. Anagram question
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Q2. Sql join questions
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Initially, they shortlist the candidates and group them into batches of 15 students. During this process, they conduct a group discussion (GD) in which each student has 3 minutes to think, followed by an opportunity to describe their points in 2 to 3 minutes.

Coding test around front end using react

Q1. Tell about yourself
Ans. Name, address, family details and past company details with work experince
Answered by dheeraj kumar gupta
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Q2. What is structured way to problem solving.
Ans. 
A structured way to problem solving involves defining the problem, generating possible solutions, evaluating those solutions, and implementing the best one.
• Define the problem clearly and understand its root cause.

• Generate multiple possible solutions to the problem.

• Evaluate each solution based on feasibility, effectiveness, and impact.

• Select the best solution and create an action plan for implementation.

• Monitor and eval
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Q1. Tell about your self
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