Boeing Programmer Analyst 3 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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Round duration - 90 minutes
Round difficulty - Medium

It was in the afternoon. I have to switch on my webcam during test. 1 person taking the test and 3 people were monitoring me. they ask many questions apart from the test as well. He give me some situations and ask me to give solution for the problem by writing algorithm and code.

Q1. 
Anagrams Problem Statement
You are given an array/list of strings called inputStr. Your task is to return the strings as groups of anagrams such that strings belonging to the same group are anagrams of ea...read more
Ans. 
Given an array of strings, group the strings that are anagrams of each other.
• Iterate through the array of strings and sort each string alphabetically to create a key for grouping.

• Use a hashmap to store the sorted string as key and the list of anagrams as value.

• Return the values of the hashmap as the grouped anagrams.
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Round duration - 90 minutes
Round difficulty - Medium

It was in the evening. I have to switch on my webcam during test. 1 person taking the test and 3 people were monitoring me. They asked many questions apart from the test as well.

Round duration - 30 minutes
Round difficulty - Medium

It was in the evening. There was total 3 persons in the meeting. They asked me many questions regarding my projects and my previous experience too. The interviewer were very friendly.

Round duration - 90 minutes
Round difficulty - Medium

It was in the morning. It was a one to one conversation. He asked me questions regarding my lifestyle, interests and work experience too. He asked me to tell me about myself for about 5 minutes. Then we talk a lot about current affairs too. Then we talked about package too. The interviewer was very nice and friendly in nature.

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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