Boeing Mechanical System Design and Analysis Engineer Interview Questions and Answers

Q1. A DSA question based on Linked List. Find the longest common suffix of 2 linked lists. for eg-> 1 ->8 -> 9 -> 7 -> 3 -> 2 -> 6 4 -> 8->5->7-> 3-> 2 -> 6, given the head of both linked lis...read more
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Q1. Implement LFU cache in Java. Questions on Java, Spring, microservices and my current project discussion.
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Q1. Managerial round
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Q1. Bits , bytes and xor.
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Q1. Threads, mutex and IPC
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Q1. Tell about company and yourself. More if behavioural round.
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Q1. String Manipulation program
Ans. 
Create a program for string manipulation using an array of strings.
• Use built-in string manipulation functions like substring, replace, and concat.

• Iterate through the array of strings to perform different manipulations.

• Consider edge cases like empty strings or null values.

• Example: Reverse each string in the array and concatenate them together.
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Q2. Internal Working of HashMap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed again to fi...read more
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Q3. Spring Annotations
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Q1. Coding question
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Q2. Maven working in Depth
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Q3. SQL, Oracle/MySql
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Q1. Linux , puzzle, simple programs l
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Q1. About me and about my previous work
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Round duration - 90 Minutes
Round difficulty - Medium

Mainly mcqs and some coding questions

Q1. 
Nth Fibonacci Number Problem Statement
Calculate the Nth term in the Fibonacci sequence, where the sequence is defined as follows: F(n) = F(n-1) + F(n-2), with initial conditions F(1) = F(2) = 1.
Input:
...read more
Ans. 
Calculate the Nth Fibonacci number efficiently using dynamic programming.
• Use dynamic programming to store previously calculated Fibonacci numbers to avoid redundant calculations.

• Start with base cases F(1) and F(2) as 1, then iterate to calculate subsequent Fibonacci numbers.

• Optimize the solution to have a time complexity of O(N) by storing and reusing calculated values.
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Round duration - 60 Minutes
Round difficulty - Easy

Introduction and some Python Questions

Q1. 
String Palindrome Verification
Given a string, your task is to determine if it is a palindrome considering only alphanumeric characters.
Input:
The input is a single string without any leading or trailing...read more
Ans. 
Check if a given string is a palindrome considering only alphanumeric characters.
• Remove non-alphanumeric characters from the input string before checking for palindrome.

• Use two pointers approach to compare characters from start and end of the string.

• Convert all characters to lowercase for case-insensitive comparison.

• Return true if the string is a palindrome, false otherwise.
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Round duration - 60 Minutes
Round difficulty - Easy

Questions related to cloud deployments and all

Q1. Can you explain your approach to project scaling in AWS?
Ans. 
My approach to project scaling in AWS involves utilizing auto-scaling groups, load balancers, and monitoring tools.
• Utilize auto-scaling groups to automatically adjust the number of EC2 instances based on traffic patterns

• Implement load balancers to distribute incoming traffic evenly across multiple instances

• Use monitoring tools like CloudWatch to track performance metrics and make informed scaling decisions
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Round duration - 45 Minutes
Round difficulty - Easy

Mainly discussed the future goals and expectations from the company

Q1. Can you discuss your work experience, the company culture you've encountered, and your future expectations regarding growth opportunities?
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Detailed understanding of Spring Framework and Java Concepts.
Questions on Stream API
Questions on Concurrency
2 Coding questions first on String manipulation and second based on Tree.
Overall prepare good for Java concepts.