24/7 Customer SDE-2 Interview Questions and Answers

Interview was around 1.15 hrs. Initially it was self introduction for both sides. Then a string manipulation related question was posted and asked to solve. At last it was queries to interviewer.

Total time 1hr. Self introduction for both parties.
Questions on CICD process in my project and automation ideas to handle errors with different scenarios. Then queries if any.

Total time 1.15hr.
Self introduction and coding question related to linked list in codility. The question was enhanced depending on splving techniques. Finally queries.

Q1. Why are you looking for a change?
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Round duration - 60 Minutes
Round difficulty - Medium

Q1. 
Rearrange String Problem Statement
Given a string ‘S’, your task is to rearrange its characters so that no two adjacent characters are the same. If it's possible, return any such arrangement, otherwise re...read more
Ans. 
Given a string, rearrange its characters so that no two adjacent characters are the same.
• Iterate through the string and count the frequency of each character.

• Use a priority queue to rearrange the characters based on their frequency.

• Check if it's possible to rearrange the string without any two adjacent characters being the same.

• Return 'Yes' if possible, 'No' otherwise.
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Q2. 
Find Nodes at Distance K in a Binary Tree
Your task is to find all nodes that are exactly a distance K from a given node in an arbitrary binary tree. The distance is defined as the number of edges between ...read more
Ans. 
Find all nodes at distance K from a given node in a binary tree.
• Perform a depth-first search starting from the target node to find nodes at distance K.

• Use a recursive function to traverse the tree and keep track of the distance from the target node.

• Maintain a set to store visited nodes to avoid revisiting them.

• Return the list of nodes found at distance K from the target node.

• Example: If the target node is 5 and K is 2 ...read more
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Round duration - 60 Minutes
Round difficulty - Medium

Q1. 
My Calendar Problem Statement
Given N events, each represented with a start and end time as intervals, i.e., booking on the half-open interval [start, end). Initially, the calendar is empty. A new event c...read more
Ans. 
Given N events with start and end times, determine if each event can be added to the calendar without causing a triple booking.
• Iterate through each event and check if adding it causes a triple booking by comparing its interval with previous events

• Use a data structure like a list or dictionary to keep track of booked intervals

• Return 'True' if the event can be added without causing a triple booking, 'False' otherwise
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Round duration - 45 minutes
Round difficulty - Easy

Round duration - 60 minutes
Round difficulty - Easy

Q1. 
Make Palindrome Problem Statement
You are provided with a string STR of length N comprising lowercase English alphabet letters. Your task is to determine and return the minimum number of characters that n...read more
Ans. 
The task is to determine the minimum number of characters needed at the beginning of a string to make it a palindrome.
• Iterate from both ends of the string and compare characters to find the number of characters needed to make it a palindrome.

• Use dynamic programming to optimize the solution by storing results of subproblems.

• Handle edge cases like an already palindrome string or an empty string.

• Example: For 'deed', no ch...read more
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Q2. 
Wildcard Pattern Matching Problem Statement
Implement a wildcard pattern matching algorithm to determine if a given wildcard pattern matches a text string completely.
The wildcard pattern may include the...read more
Ans. 
Implement a wildcard pattern matching algorithm to determine if a given wildcard pattern matches a text string completely.
• Create a dynamic programming matrix to store intermediate results

• Handle cases for '?' and '*' characters separately

• Check if the characters in the pattern and text match accordingly

• Return 'True' if the text matches the pattern, otherwise 'False'
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Round duration - 90 minutes
Round difficulty - Medium

It was nice

Q1. What is BCNF and why is it important in database management systems?
Ans. 
BCNF stands for Boyce-Codd Normal Form, a higher level of normalization in database management systems.
• BCNF is a stricter form of 3NF (Third Normal Form) and ensures that there are no non-trivial functional dependencies between attributes.

• It helps in reducing redundancy and anomalies in the database.

• BCNF is important as it helps in maintaining data integrity and improving database performance.

• Example: If we have a tabl...read more
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Q2. You are given a rectangular container filled with 1 liter of liquid. How can you pour out half a liter without seeing or measuring it?
Ans. 
Tilt the container until the liquid reaches the edge, then pour out half of it.
• Tilt the container slowly until the liquid reaches the edge

• Once the liquid is at the edge, pour out half of it

• This method works because the liquid will naturally settle at the lowest point, allowing you to estimate the halfway mark
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Round duration - 45 mintues
Round difficulty - Easy

Very nice interviews very helpful.

Round duration - 60 minutes
Round difficulty - Medium

A problem solving round with 1 problem on DP. It was on a platform with a text editor provided. Was expected to solve the problem and write the code. Post initial discussion on the solution approaches came up with an optimized solution using Dynamic Programming and wrote the solution. Then some discussion on the Time and Space complexity of the solution. 

Interviewer was satisfied with the solution and also dry ran with 1 test case.

Q1. 
Possible Words from a Phone Number: Problem Statement
Given a string S composed of digits ranging from 2 to 9, determine all possible strings that can be created by mapping these digits to their correspon...read more
Ans. 
Given a phone number string, generate all possible words by mapping digits to letters on a T9 keypad.
• Create a mapping of digits to corresponding letters on a T9 keypad

• Use recursion to generate all possible combinations of letters for the input phone number

• Sort the generated strings in lexicographical order
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Round duration - 60 minutes
Round difficulty - Hard

This round happened on the same day after 1st round. It was a Low level design round with one problem to be solved in 60 minutes.

Round duration - 60 minutes
Round difficulty - Medium

This round happened on the same day after 2nd round. The platform used was codility. It was a System design/ Low level design round with one problem to be solved in 60min.

Round duration - 30 minutes
Round difficulty - Easy

It was an HR round with focus on the work ethics, culture and my prior experiences. The recruiter was trying to test my situation handling capability by asking different scenario based questions.

Inquiring about salary expectations will likely lead to an offer that does not exceed 30%, with 12% as a variable amount allocated for a performance bonus, which you may never receive, based on the rationale that your experience is not relevant, despite having a background in a related field such as voice processing. Additionally, do not anticipate clear job descriptions, as the company's approach is broad and diplomatic, reflecting a lack of transparency.

Q1. Tell me about yourself.
Ans. 
Experienced voice process executive with strong communication skills and a proven track record of delivering exceptional customer service.
• Over 5 years of experience in handling customer queries and resolving issues efficiently

• Proficient in using CRM software to track customer interactions and maintain records

• Skilled in active listening and problem-solving to ensure customer satisfaction

• Ability to work well under pressu
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Q2. Questions which are not relevant or the process and work criteria they are not aware of from previous job role,and if you have number or percentage in your resume then please remove it that will be ur ene...read more
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Q1. Tell me about yourself
Ans. 
I am a dedicated and empathetic customer support associate with a passion for helping customers resolve their issues.
• Experienced in handling customer inquiries and providing solutions

• Strong communication skills both written and verbal

• Ability to remain calm and professional in high-pressure situations

• Familiar with CRM systems and ticketing platforms

• Previous experience in retail customer service
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Q2. Walk me through the resume
Ans. 
I have a diverse background in customer service and communication skills.
• Started as a customer service representative at XYZ Company, handling inquiries and resolving issues

• Promoted to team lead, responsible for training new hires and managing escalations

• Completed a communication skills workshop to improve interactions with customers
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Q1. Walk me through the resume
Ans. 
Experienced in customer service and problem-solving skills, with a background in retail and hospitality.
• Started career in retail, providing excellent customer service and resolving issues

• Transitioned to hospitality industry, honing communication and problem-solving skills

• Currently seeking to apply skills in customer support role
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Q2. Salary expectation
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English test, email writing

Q1. I don't remember the questions as it was 13 years ago.
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Q2. I don't remember the questions as it was 13 years ago.
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Q1. I don't remember the questions as it was 13 years ago.
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Q2. I don't remember the questions as it was 13 years ago.
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