Boeing Data Engineer Interview Questions and Answers

Q1. What is the difference between a tuple and a list in Python
Ans. 
A tuple is immutable and uses parentheses, while a list is mutable and uses square brackets in Python.
• Tuples are immutable, meaning their elements cannot be changed after creation

• Lists are mutable, allowing for elements to be added, removed, or modified

• Tuples are created using parentheses, while lists use square brackets

• Example: tuple = (1, 2, 3) vs list = [1, 2, 3]
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Q2. How do you access elements in a python dictionary
Ans. 
Access elements in a Python dictionary using keys
• Use square brackets [] with the key to access the value in the dictionary

• Use the get() method to access a value with a default return if the key does not exist

• Use the keys() method to get a list of all keys in the dictionary
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Q1. Name a time you had to resolve conflict in a team setting?
Ans. 
Resolved conflict in team by facilitating open communication and finding common ground.
• Encouraged team members to share their perspectives and concerns

• Acted as a mediator to help parties understand each other's viewpoints

• Facilitated a compromise or solution that addressed everyone's needs
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Q2. What is one of your biggest weaknesses?
Ans. 
One of my biggest weaknesses is my tendency to overthink and second-guess myself.
• I often spend too much time analyzing a problem before taking action

• I sometimes struggle with making decisions quickly

• I am working on trusting my instincts more and being more decisive
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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. Explain RANKX function in power bi
Ans. 
RANKX function in Power BI is used to calculate the ranking of a value in a specified column.
• RANKX function assigns a rank to each row in a table based on a specified expression.

• It can be used to rank sales performance, customer satisfaction scores, etc.

• Syntax: RANKX(table, expression, [value], [order], [ties])

• Example: RANKX(Sales, Sales[Revenue], , DESC, Dense)
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Choose the best answer and question and answer

Tell the topic an send the assignment

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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Tell me your self and previous company work

Q1. Tell me your self
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Q2. What is the previous role in your previous company
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Q3. What is the your strenght
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