Boeing Lead Engineer Interview Questions and Answers

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with basic DSA questions. Questions on Selenium and Linux commands were also asked.

Q1. 
Reverse a String Problem Statement
Given a string STR containing characters from [a-z], [A-Z], [0-9], and special characters, determine the reverse of the string.
Input:
The input starts with a single i...read more
Ans. 
Reverse a given string containing characters from [a-z], [A-Z], [0-9], and special characters.
• Iterate through the characters of the string from end to start and append them to a new string to get the reversed string.

• Use built-in functions like reverse() or StringBuilder in languages like Java for efficient reversal.

• Handle special characters and numbers along with alphabets while reversing the string.

• Ensure to print eac...read more
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Q2. 
Duplicate Characters in a String
Given a string 'S' of length 'N', identify and return all the characters in the string that appear more than once along with their frequency.
Example:
Input:
 N = 5
 S =...read more
Ans. 
Identify and return all characters in a string that appear more than once along with their frequency.
• Iterate through the string and count the frequency of each character using a hashmap.

• Return characters with frequency greater than 1 in an array of tuples.
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Q3. What is the cut command in Linux and how do you use it?
Ans. 
The cut command in Linux is used to extract sections from each line of input.
• Used to cut out specific sections of text from a file or input stream

• Can specify the delimiter used to separate fields

• Options include -c for characters, -f for fields, and -d to specify the delimiter

• Example: cut -d',' -f1,3 file.txt
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Q4. What is the Find command in Linux and how is it used?
Ans. 
The Find command in Linux is used to search for files and directories based on specified criteria.
• Used to search for files and directories in a specified directory

• Criteria can include file name, size, permissions, and more

• Can be combined with other commands like -exec to perform actions on found files
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Q1. Core Java Spring EJB Rest API
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Q1. Core Java Spring Design Pattern
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Q1. Basics of testing
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Q2. Sql basic, joins
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Q3. Unix and shell scripting
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Q1. Javascript basics, Easy to Medium coding problems
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Q1. React server side vs client side
Ans. 
React server side rendering generates HTML on the server while client side rendering generates HTML on the browser.
• Server side rendering is better for SEO and initial page load time

• Client side rendering is better for interactivity and dynamic content

• Server side rendering requires more initial setup and configuration

• Client side rendering can be easier to develop and maintain
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Q2. Convert class based component to functional component
Ans. 
To convert a class based component to functional component, we need to remove the class syntax and use hooks instead.
• Remove the class syntax and replace it with a function

• Remove the render method and return the JSX directly

• Replace this.props with props

• Use useState hook to manage state

• Use useEffect hook to manage lifecycle methods
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Q3. SQL easy to medium questions
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Q1. Manager round. Discussion about the current project that you are working, technical implementation using AWS
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Q2. Behavioural questions
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Q1. Behavioural questions
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Normal Aptitude test for 1 hour

Q1. How to reverse an array?
Ans. 
To reverse an array of strings, iterate through the array and swap elements from start to end.
• Iterate through the array using two pointers, one starting from the beginning and the other from the end.

• Swap elements at the two pointers until they meet in the middle.

• Repeat until all elements are swapped and the array is reversed.
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Q1. Tell me about your strengths and weakness
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Q1. Explain OOPS and functional programming
Ans. 
OOPS focuses on objects and classes, while functional programming focuses on functions as first-class citizens.
• OOPS involves concepts like inheritance, encapsulation, and polymorphism.

• Functional programming emphasizes immutability, pure functions, and higher-order functions.

• In OOPS, data is typically stored in objects with methods to manipulate the data.

• Functional programming avoids side effects and mutable state.

• Examp...read more
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