Delhivery Network Engineer Interview Questions and Answers

Q1. Csharp basics and a coding questing was given to implement
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Q2. .net and angular basics questions
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Q1. Asked deeply about my resume and technologies
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Q2. Coding question to sort a given array using DSA
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Given 3 strings S, S1, S2 containgin M, N and k characters respectively, task is to modify string by replaicing all substring S1 with S2 and S

Q1. Given a string, find the longest length palindromic substring in the given string.
Ans. 
Find the longest palindromic substring in a given string.
• Use dynamic programming to solve the problem efficiently.

• Start with the base cases of single characters and two characters.

• For longer substrings, check if the first and last characters match and if the substring between them is also a palindrome.

• Keep track of the longest palindrome seen so far.

• Time complexity: O(n^2), space complexity: O(n^2).
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Q1. Mention the most challenging technical problem you had to solve.
Ans. 
Developing a real-time data processing system for a high-traffic website.
• Designing a scalable architecture to handle the high volume of incoming data.

• Optimizing the data processing algorithms to minimize latency.

• Ensuring data consistency and accuracy in a distributed system.

• Implementing fault-tolerant mechanisms to handle system failures.

• Testing and debugging the system under various load conditions.
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Q2. Some minor low level entity design.
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Q1. Basic to intermediate aptitude questions
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Q2. MCQ questions on Machine learning, DS and algo, Web development, Operating systems and DBMS. All basic level
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Q3. Coding round. 1. Tables are given and asked to write SQL and NOSQL queries for given questions 2. 3 coding questions 2 intermediate and 1 hard level questions
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Q1. Explain Tree and Graph Data Structure. How to implement them? I was not asked to write the code but Interviewer just wanted to know i understand the logic behind them.
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Q2. Difference between a application server and webserver. And examples for both.
Ans. 
Application server manages business logic while web server handles HTTP requests.
• Application server executes business logic and manages transactions.

• Web server handles HTTP requests and serves static content.

• Examples of application servers are JBoss, WebSphere, and Tomcat.

• Examples of web servers are Apache, Nginx, and IIS.
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Q3. I was asked about projects done in my college. Technologies I used and why I used them
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Q1. What are your strengths and weaknesses?
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Q2. What is your family background?
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Q3. Tell me about yourself.
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Q4. Why Maersk and what are you looking for at Maersk?
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Q1. How to build Flutter Applications
Ans. 
Flutter applications can be built using Dart programming language and Flutter SDK.
• Install Flutter SDK and Dart programming language

• Choose an IDE like Android Studio or Visual Studio Code

• Create a new Flutter project

• Write code using Dart programming language

• Test and debug the application

• Build and deploy the application on various platforms
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Q2. Explain Roles and Responsibilities
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Q1. Explain Roles and Responsibilities
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Q2. Tell About Maersk Company
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Q1. Questions on unix and java
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Q1. Project related, previous projects
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Q1. Java, unix, sql related and conceptual
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Q1. Testing test yasdjalsd a aslkjdad
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Q1. IngTest aslkdja;ld asldjkas;d a;dk
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