Expedia Group Sdet Automation Test Engineer Interview Questions and Answers

Q1. The hiring manager asked me to code the right view of the tree.
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It was very good 60 questions

3 coding question everhthing was hard

Q1. What is java and cpp and dbms sql etc
Ans. 
Java is a popular programming language, C++ is another programming language, and DBMS SQL is a language used for managing databases.
• Java is an object-oriented programming language commonly used for building web applications and software.

• C++ is a high-level programming language often used for system programming and game development.

• DBMS SQL is a language used to interact with relational databases, allowing users to retr...read more
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Q2. What is python, oops and inheritance
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Python is a high-level programming language known for its simplicity and readability. OOPs (Object-Oriented Programming) is a programming paradigm that uses objects and classes. Inheritance is a feature of OOPs that allows a class to inherit properties and behavior from another class.
• Python is a versatile, interpreted language used for web development, data analysis, artificial intelligence, and more.

• OOPs focuses on cr...read more
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Q1. Design URL shorterner
Ans. 
Design a URL shortener service to generate short URLs for long URLs.
• Use a hashing algorithm to generate unique short codes for long URLs.

• Store the mapping of short codes to long URLs in a database.

• Redirect users from short URLs to the corresponding long URLs.

• Implement analytics to track usage and performance of the service.
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First was round based on Quality engineering concepts and aptitude combob

Q1. Question on How proxy configured for device
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Q2. What is test scenario,test case.
Ans. 
Test scenario is a high-level description of the functionality to be tested, while test case is a detailed step-by-step procedure to validate the functionality.
• Test scenario is a broad description of what needs to be tested, while test case is a detailed set of steps to verify a specific aspect of the scenario.

• Test scenario is usually written in a more general and abstract way, while test case is more specific and conc...read more
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It consisted of 2 dsa questions

Q1. Tell me abiut yourself
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I am an experienced SDET Automation Test Engineer with a strong background in software testing and test automation.
• I have a Bachelor's degree in Computer Science and have been working in the field for over 5 years.

• I have expertise in designing and implementing test automation frameworks using tools like Selenium and Cucumber.

• I have experience in writing test scripts, executing test cases, and analyzing test results.

• I a...read more
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Q2. Your weaknesses
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Q1. Basic Java 2 coding questions
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Q2. Testing related scenario based questions
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Q1. 1 easy java question
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Q2. Work experience and project related questions.
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Q3. Frameworks related questions
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Q4. Scenario based Question
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Q1. Everything related to your resume
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Q2. Projects you've worked on in detail
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Q3. Behavioural Questions
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Arrays Strings Hashmaps were asked

Round duration - 120 minutes
Round difficulty - Medium

10 min for debugging
40 min for problems(coding)
40 min for pyschometric
30 min for aptitude

Q1. 
Total Unique Paths Problem Statement
You are located at point ‘A’, the top-left corner of an M x N matrix, and your target is point ‘B’, the bottom-right corner of the same matrix. Your task is to calcula...read more
Ans. 
The task is to calculate the total number of unique paths from the top-left to bottom-right corner of an M x N matrix by moving only right or down.
• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the number of unique paths for each cell in the matrix.

• Initialize the first row and first column with 1 as there is only one way to reach each cell in the first row and column.

• For each cell ...read more
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Q2. 
Most Frequent Word Problem Statement
You are given two strings 'A' and 'B' composed of words separated by spaces. Your task is to determine the most frequent and lexicographically smallest word in string ...read more
Ans. 
Find the most frequent and lexicographically smallest word in string 'A' that is not present in string 'B'.
• Split strings 'A' and 'B' into words

• Count frequency of each word in 'A'

• Check if word is not in 'B' and is the most frequent and lexicographically smallest

• Return the word or -1 if no such word exists
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Round duration - 90 Minutes
Round difficulty - Easy

timing was 4 pm . we connected on amazon chime. Initially he asked me a few things from resume then moved on to problem solving.

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Use Depth First Search (DFS) or Breadth First Search (BFS) to traverse the matrix and identify connected groups of 1s.

• Maintain a visited array to keep track of visited cells to avoid redundant traversal.

• Increment the island count each time a new island is encountered.

• Consider all eight possible directions for connectivity while traversing the matrix.

• Handle edge ca...read more
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Q2. 
Largest Rectangle in Histogram Problem Statement
You are given an array/list HEIGHTS of length N, where each element represents the height of a histogram bar. The width of each bar is considered to be 1.
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Ans. 
Find the area of the largest rectangle that can be formed within the bounds of a given histogram.
• Iterate through the histogram bars and maintain a stack to keep track of increasing heights.

• Calculate the area of the rectangle formed by each bar as the smallest height in the stack times the width.

• Update the maximum area found so far and return it as the result.
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