Delta Air Lines Software Developer 1 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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1 dsa question 1 sql and 18 mcq questions

Q1. Lot of questions from resumes and projects
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Q2. Easy DSA questions and oops questions
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Q1. About sdlc stlc manual testing topics
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Q1. Coding, few automation topics
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Q1. General topics discussion
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Q1. Salary Discussion
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Write a simple algorithm for string manipulation

Q1. Explain how multithreading works?
Ans. 
Multithreading allows multiple threads to run concurrently within a single process, improving performance and responsiveness.
• Multithreading allows for parallel execution of tasks within a single process.

• Threads share the same memory space, allowing for efficient communication and data sharing.

• Thread management is handled by the operating system, which schedules threads for execution.

• Examples of multithreading include w...read more
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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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Q1. Common technical questions
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Q1. Advance Technical Questions based on your skill set taken by architect
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Common coding problems difficulty laver moderate

Q1. Common managerial question ,scenario base questions
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Simple string manipulation

Q1. Basic c# questions
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