Atna Technologies Senior Software Engineer Interview Questions and Answers

Duration: 1Hour 30 Minutes, 2 Coding Questions of Total 175 Marks. 1st Question has 75 marks and 2nd Question has 100 marks.

Q1. 1. Find the smallestMissingNumber in given array using Bitwise OR operation alone 2. Based on Array data Manipulation.
Ans. 
Using Bitwise OR operation to find the smallest missing number in an array.
• Iterate through the array and perform Bitwise OR operation with each element to set corresponding bit in a bitmask

• Iterate through the bitmask to find the first unset bit, which represents the smallest missing number

• Example: Array [0, 1, 3, 4, 6] would have a bitmask of 10101, smallest missing number is 2
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Q2. Q2: Customized Data Extraction From Given Dynamic Array & Perform Some Math Operations On the Extracted Data
Ans. 
Extract data from a dynamic array and perform mathematical operations on it.
• Identify the dynamic array structure, e.g., ['12', '15', '20'].

• Convert string elements to integers for mathematical operations.

• Perform operations like sum, average, or product on the extracted data.

• Example: For array ['2', '3', '5'], sum = 2 + 3 + 5 = 10.

• Use built-in functions like map() for conversion and reduce() for aggregation.
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Q1. Write a Pseudo code for given scenario?
Ans. 
Pseudo code for a scenario
• Define variables and data structures needed

• Write the main logic using conditional statements and loops

• Handle edge cases and error conditions

• Test the pseudo code with sample inputs
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Q1. System Design & Design Pattern based questions
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Q1. Not Applicable (Yet to be scheduled)
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4 Rounds:
Online Assesment, Leetcode medium type questions
Application Design: Write solution with Design patterns
LLD
HLD

LeetCode style DS Algo Questions

Q1. Low Level Design
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Q1. High Level Design
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Q1. Normal Behavioural Questions
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3 questions, 2 dsa and 1 sql query

Q1. Design a Url Shortener serive
Ans. 
A URL shortener service that converts long URLs into shorter, more manageable links.
• Generate a unique short code for each long URL

• Store the mapping between short code and long URL in a database

• Redirect users from short URL to original long URL when accessed
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Q1. Given a nextjs repo, execute some tasks for product review page.
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Q2. Application design of e-commerce app.
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Online coding test had two questions to be solved in 60 mins. Medium level questions to be expected.

Q1. Codility test: Moderate level machine coding round, not leetcode type. Deep understanding of interface and backend knowledge required. Interviewer was absolutely uninterested.
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