NTT Global Data Centers and Cloud Infrastructure Data Center Engineer Interview Questions and Answers

Round duration - 40 minutes
Round difficulty - Medium

Asked about time complexity of algorithm, puzzles, DBMS, cutting edge technologies etc. What are indexes?

Q1. 
Flip Bits Problem Explanation
Given an array of integers ARR of size N, consisting of 0s and 1s, you need to select a sub-array and flip its bits. Your task is to return the maximum count of 1s that can b...read more
Ans. 
Given an array of 0s and 1s, find the maximum count of 1s by flipping a sub-array at most once.
• Iterate through the array and keep track of the maximum count of 1s obtained by flipping a sub-array.

• Consider flipping a sub-array from index i to j and calculate the count of 1s in the resulting array.

• Return the maximum count of 1s obtained by flipping a sub-array at most once.
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Round duration - 20 minutes
Round difficulty - Medium

Asked 1 standard algorithm

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Iterate through the matrix and perform depth-first search (DFS) to find connected 1s.

• Mark visited cells to avoid redundant traversal.

• Increment island count whenever a new island is encountered.
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Some basic questions of logical reasoning.

Questions related to OOPS and DSA up to Linked list and stack queues.

Q1. Some oops questions and questions related to projects.
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Q2. Some basic questions about SAAS and cloud.
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Q1. Previous project discussion Javascript fundamentals. basic SQL queries
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Q1. Asked to write Triggers
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Q2. Data security and batch class
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Graphs,array and link list question

Q1. Focus on core CS subject with basic dsa
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Q1. Medium DSA round with project
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Q1. Salary negotiations and basic behavioral topics
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Q1. Diff between fastapi and flask
Ans. 
FastAPI is a modern, fast web framework for building APIs with Python, while Flask is a lightweight web framework.
• FastAPI is faster than Flask due to its use of Pydantic for data validation and serialization.

• FastAPI has automatic interactive API documentation with Swagger UI and ReDoc, while Flask requires additional setup for documentation.

• FastAPI supports type hints and async/await syntax out of the box, making it ea...read more
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