Boeing Associate Software Engineer Interview Questions and Answers

Q1. What is the internal implementation of Hashing and what is collision?
Ans. 
Hashing is a technique used to map data to a fixed-size array, collision occurs when two different inputs produce the same hash value.
• Hashing involves using a hash function to map data to a fixed-size array.

• Collision happens when two different inputs produce the same hash value.

• Common techniques to handle collisions include chaining and open addressing.
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Q2. Is time complexity of HashMap always O(1) ?
Ans. 
No, time complexity of HashMap is not always O(1).
• Time complexity of HashMap is O(1) on average, but can degrade to O(n) in worst case scenarios.

• Worst case scenarios include hash collisions, which can lead to linear probing and degrade performance.

• Load factor and capacity of the HashMap can also affect time complexity.

• In scenarios where many keys hash to the same index, the time complexity can degrade.
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Q1. Yet to have the interview. Ambition box is forcefully making me enter these details
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Q1. AWS system design question
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Q1. How js async working
Ans. 
JavaScript async allows non-blocking code execution by using Promises or async/await syntax.
• Async functions return a Promise object.

• Promises represent a value that may be available now, in the future, or never.

• Async/await syntax simplifies asynchronous code by using keywords async and await.

• Callbacks can also be used for handling asynchronous operations.
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Tree algorithm about some riddels

Q1. What is gcd? And explain it
Ans. 
gcd stands for greatest common divisor, the largest positive integer that divides two or more numbers without leaving a remainder.
• gcd is used to find the largest integer that can evenly divide two or more numbers.

• It is commonly used in mathematics and computer science algorithms.

• For example, the gcd of 12 and 18 is 6, as 6 is the largest number that can divide both 12 and 18 without leaving a remainder.
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Q2. What is arc and explain it
Ans. 
ARC stands for Automatic Reference Counting, a memory management technique used in programming languages like Objective-C and Swift.
• ARC automatically tracks and manages the memory used by objects in a program

• It increases the retain count of an object when it is referenced and decreases it when it is no longer needed

• ARC helps prevent memory leaks and retain cycles in iOS and macOS development
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Q1. There were questions of DSA, DBMS, OS etc
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Q2. There were questions around project that were mentioned in resume.
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Q1. Difference between Virtual DOM and DOM
Ans. 
Virtual DOM is a lightweight copy of the actual DOM, used for efficient updates in web applications.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• Changes are first made to the Virtual DOM, then compared with the actual DOM to determine the minimal updates needed.

• This process reduces the number of expensive DOM operations, resulting in faster renderi
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Q2. Difference between Angular and React
Ans. 
Angular is a full-fledged framework for building web applications, while React is a JavaScript library for building user interfaces.
• Angular is a complete framework with built-in features like routing, forms, and HTTP client.

• React is a library focused on building UI components and managing state.

• Angular uses two-way data binding, while React uses one-way data flow.

• Angular uses TypeScript by default, while React uses Jav...read more
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