Deutsche Telekom Digital Labs Senior Software Engineer Interview Questions and Answers

I was asked to implement lru cache which i did but still didn’t made to next round as apparently i didn’t complete the working code though in my opinion i did

Q1. Python, Django questions Easy to Medium level DSA Discussion on Project and previous work experience Some SQL queries
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Q1. Some Python questions and discussion on work experience Some design question like how you will design backend for some project from scratch Some managerial questions Questions on git
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Q1. Some basic HR questions
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Medium range 2 questions

Q1. Its design round question
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Q1. Custom sort , and some polyfills
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Q1. Implement Linked list
Ans. 
Linked list is a data structure where each node points to the next node.
• Create a Node class with data and next pointer

• Create a LinkedList class with head pointer

• Implement methods to add, remove, search, and traverse the list
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Q2. Implement Hash Map with array and linked list.
Ans. 
Implement Hash Map with array and linked list.
• Create an array of linked lists

• Hash function maps keys to array indices

• Insert key-value pairs into linked lists

• Handle collisions by chaining

• Search for a key by hashing and traversing linked list
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Q3. How to create a immutable class in java
Ans. 
To create an immutable class in Java, follow these steps:
• Make the class final

• Make all fields private and final

• Do not provide any setter methods

• Initialize all fields via constructor

• If any field is mutable, return a clone of it instead of the original object
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HackerRank Test - 2 Medium Questions
1. Given an Array Weights of Chocolates, Find Maximum amount of Chocolate that can be saved after "d" days, if you eat half the weight of one of the chocolates every day.
2. Find Closest String with equal number of vowels and consonants.