Cell Com Teleservices Senior Design Engineer Interview Questions and Answers

Q1. 1. Questions around projects : JWT, UserAuthentication etc
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Q2. 2. Write a code to find frequency of characters in a given string?
Ans. 
Code to find frequency of characters in a given string
• Use a hash table to store character frequencies

• Iterate through the string and update the hash table accordingly

• Print the hash table to display the character frequencies
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Q1. 1. Write a code to reverse a linked list?
Ans. 
Code to reverse a linked list
• Create three pointers: prev, curr, and next

• Initialize prev to null and curr to head

• Loop through the list and set next to curr's next node

• Set curr's next node to prev

• Move prev and curr one node ahead

• Return prev as the new head
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Q2. 2. Write a code to reverse linked list in size of K?
Ans. 
Code to reverse linked list in size of K
• Create a function that takes head of linked list and size K as input

• Traverse the linked list in groups of K nodes

• Reverse each group of K nodes using iterative or recursive approach

• Connect the reversed groups to form the final linked list

• Return the new head of the reversed linked list
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Q3. 3. Questions around project and design a database structure for comments system of quora?
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Q1. Basic HR round questions
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Given an simple gaming questions to be developed in JS

Given another UI design in image to be developed

Coding assessment in Code signal which is vedio proctored

Q1. Design a loan application system
Ans. 
Design a loan application system
• Collect applicant information such as personal details, employment history, and financial information

• Include a credit check process to assess applicant's creditworthiness

• Implement a system for loan approval/rejection based on set criteria

• Provide options for different types of loans and repayment plans

• Ensure security measures are in place to protect applicant's sensitive information
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Bank account creation, deposit money, withdraw money

Q1. Question around work experience and how a particular scenario or situation is handled
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Suggest system cost optimization based on given data set

Duration is 2 hour , Hackerearth portal
4 coding question, 1 SQL query

Q1. HR explored the CV and asked question
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Q2. About current Project
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Q3. About personal Aspiration
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70 mins 4 topics, 1/2 easy, 3 would be easy+, need detail orientation, 4 would be medium,

Easy case study, code review and find the bug

DSA coding round.
Graph based question, dp question.

Q1. 1. design service to download big file
Ans. 
Design a service to download large files.
• Use a scalable architecture to handle large file downloads.

• Implement resumable downloads to handle network interruptions.

• Use parallel downloading to speed up the download process.

• Implement authentication and authorization to ensure security.

• Provide progress updates to the user during the download process.
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Q1. Java based questions Spring beans
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Q1. What is mean by testing
Ans. 
Testing is the process of evaluating a system or component to determine if it satisfies specified requirements.
• Testing is done to identify defects or errors in software or hardware.

• It involves executing a system or component with the intent of finding bugs or verifying its functionality.

• Testing can be performed at various levels such as unit testing, integration testing, system testing, and acceptance testing.

• Different...read more
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Q2. Why we are doing testing
Ans. 
Testing is done to ensure that the software meets the requirements and is of high quality.
• To identify defects and errors in the software

• To ensure that the software meets the specified requirements

• To improve the quality of the software

• To increase customer satisfaction

• To reduce the risk of software failure

• To ensure that the software is reliable and secure
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. What are your strengths and weaknesses?
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Q5. Tell me about yourself.
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