Sierra Infosys Interview Questions and Answers

Coding Test consists of 3 Problem Question (2 Logical questions and 1 SQL Query ) and Around 20 MCQS
Platform - CoderByte

30 Aptitude Question
3 Mail Writing Question

Q1. Explain 1st Problem Solved in Coding Test. Optimize it.
Ans. 
Solved a sorting problem by implementing quicksort algorithm.
• Implemented quicksort algorithm to efficiently sort the array.

• Used recursion to divide the array into smaller subarrays and sort them individually.

• Optimized the algorithm by choosing a pivot element strategically to minimize comparisons.
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Q2. Explain 2nd Problem Solved in Coding Test. I failed 1 test case in 1st round which was told to solve again.
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Q3. Explain 3rd Question based on SQL Query.
Ans. 
The 3rd question based on SQL query likely refers to a specific query or scenario related to SQL.
• Understand the context of the query being asked about

• Analyze the structure and purpose of the SQL query

• Explain the expected output or result of the query
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Q4. Write a code to Reverse Digits.
Ans. 
Code to reverse digits of a number
• Use modulo operator to extract the last digit of the number

• Multiply the result by 10 and add the next digit until all digits are reversed

• Handle negative numbers separately by converting to positive before reversing
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Q5. A problem question for solving a SQL Query.
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Apti was easy. Technical OOP basic, SQL Basic questions were added too.

Code snippets

Platform: Hackerank

Coding questions were of basic level.
1.megre two sorted array
2.Find repeated string (case sensitive)

Q1. OOP concepts were asked
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Q2. SQL queries in good depth
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Q3. In and out of projects
Ans. 
In and out of projects refers to the involvement and contribution of a QA QC Engineer throughout the project lifecycle.
• QA QC Engineer is involved in the planning phase to ensure quality standards are defined and met.

• During the execution phase, they conduct inspections, tests, and audits to verify compliance.

• In the closing phase, they review project deliverables and document lessons learned for future projects.
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Q1. Focused on projects
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Q1. Basic HR questions
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Q2. Relocation related questions
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Small assignment to build simple App.

Q1. JavaScript Questions
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Q2. Reactjs Questions
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Q1. What is RAG actually?
Ans. 
RAG stands for Red, Amber, Green. It is a color-coded system used to indicate the status of tasks or projects.
• RAG is commonly used in project management to quickly communicate the status of tasks or projects.

• Red typically indicates that a task or project is behind schedule or facing significant issues.

• Amber signifies that there are some concerns or risks that need to be addressed.

• Green means that a task or project is o...read more
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Q2. Explain previous work
Ans. 
Developed AI algorithms for image recognition in autonomous vehicles
• Designed and implemented deep learning models for object detection and classification

• Optimized algorithms for real-time processing of high-resolution images

• Collaborated with software engineers to integrate AI models into vehicle systems
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Q1. Question Based on Linked List
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Q2. Question based on array
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Q1. What is your experience
Ans. 
I have 3 years of experience in customer support roles, handling inquiries, resolving issues, and providing excellent service.
• 3 years of experience in customer support roles

• Handled inquiries and resolved issues

• Provided excellent customer service
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Employee management system

Q1. Difference between list and set , different data types in python , questions on dictionary
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Q2. SQL and table related questions and project discussion
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