Amazon Sdet Lead Interview Questions, Process, and Tips

Mostly DSA and coding round and SQL

Q1. What is btee and it traverse
Ans. 
BTEE stands for Breadth-First Tree Enumeration and it is a method used to traverse a tree data structure.
• BTEE is a technique used to visit all the nodes of a tree level by level, starting from the root node.

• It uses a queue data structure to keep track of the nodes to be visited next.

• BTEE ensures that all nodes at the same level are visited before moving on to the next level.
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Q2. What is react and how’s is different from vue js
Ans. 
React is a JavaScript library for building user interfaces, while Vue.js is a progressive JavaScript framework for building web interfaces.
• React is a library, while Vue.js is a framework

• React uses a virtual DOM for better performance, while Vue.js uses a virtual DOM as well but with a different approach

• React has a larger community and ecosystem compared to Vue.js

• React is more flexible and allows for more customization,...read more
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Basic Data Structures

Buisness related questions

Medium leetcode DSA questions were there it was easy ...15 apti ques as well

Q1. What is event loop and how it is implemented
Ans. 
Event loop is a mechanism that allows for asynchronous programming by handling and executing events in a loop.
• Event loop is a part of the runtime environment that continuously checks the event queue and executes the callback functions associated with the events.

• It helps in managing non-blocking I/O operations efficiently by allowing the program to continue running while waiting for I/O operations to complete.

• Event loop...read more
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Q2. What is database warehousing and implementation
Ans. 
Database warehousing is the process of collecting, storing, and managing data from various sources for analysis and reporting.
• Database warehousing involves extracting data from different sources

• Data is transformed and loaded into a central repository for analysis

• It allows for complex queries and reporting on large datasets

• Examples include data warehouses like Amazon Redshift, Google BigQuery
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Q3. What are trees and balanced trees
Ans. 
Trees are data structures that consist of nodes connected by edges, with a root node at the top. Balanced trees are trees where the heights of subtrees differ by at most one.
• Trees are hierarchical data structures with a root node and child nodes.

• Balanced trees are trees where the heights of subtrees differ by at most one, ensuring efficient search and insertion operations.

• Examples of balanced trees include AVL trees, r
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Nothing much 2 leetcode hard level questions was given

Q1. Find the last number in the array
Ans. 
Iterate through the array and return the last element
• Iterate through the array using a loop

• Keep track of the last element as you iterate

• Return the last element once the loop is finished
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Q2. Reverse the linkedlist
Ans. 
Reverse a linked list
• Iterate through the linked list and reverse the pointers

• Use three pointers to keep track of current, previous, and next nodes

• Update the head of the linked list to point to the last node as the new head
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20 questions or more

3 questions programming