Veer & Co Sdet Automation Test Engineer Interview Questions and Answers

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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Q1. About xpaths and about webdriver io
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Q1. Salaey expectation and share your experience in technical
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Q1. Asked about jenkins
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First was round based on Quality engineering concepts and aptitude combob

Q1. Question on How proxy configured for device
Ans. 
Proxy configuration for devices involves setting up a server to route network requests, enhancing security and performance.
• Identify the proxy server address and port number (e.g., 192.168.1.1:8080).

• Configure the device's network settings to use the proxy (e.g., in Wi-Fi settings on mobile devices).

• Test the connection to ensure traffic is routed through the proxy (e.g., using a browser to check IP).

• Consider authenticati...read more
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Q2. What is test scenario,test case.
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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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Q1. Normal SDET questions regarding framework
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Q2. Normal SDET questions for collection framework
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SDET questions on the Collection Framework focus on data structures, performance, and usage in automation testing.
• What are the main interfaces in the Collection Framework? (e.g., List, Set, Map)

• Explain the differences between ArrayList and LinkedList.

• How does HashMap work internally? Discuss its performance characteristics.

• What is the difference between HashSet and TreeSet?

• How can you iterate over a Collection? Provide...read more
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3 hour test. 20 MCQs and 2 Coding problems

Q1. Prefix Sum and left sum of binary tree.
Ans. 
Prefix Sum and left sum of binary tree involves calculating the sum of all nodes in a binary tree and the sum of nodes on the left side of each node.
• Calculate prefix sum of binary tree by traversing in a pre-order manner and keeping track of the running sum.

• To calculate left sum of binary tree, traverse the tree in a pre-order manner and keep track of the sum of nodes on the left side of each node.

• Example: For a binary...read more
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Q1. Recursion to memoization DP problem and follow ups.
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Recursion to memoization DP problem involves optimizing recursive solutions by storing intermediate results.
• Recursion involves solving a problem by breaking it down into smaller subproblems and calling the function recursively.

• Memoization involves storing the results of expensive function calls and reusing them when the same inputs occur again.

• Dynamic Programming (DP) involves solving problems by breaking them down int...read more
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Q1. The hiring manager asked me to code the right view of the tree.
Ans. 
Implement a function to return the right view of a binary tree.
• Use a level order traversal (BFS) to explore the tree.

• Keep track of the last node at each level to form the right view.

• Utilize a queue to facilitate the traversal of nodes level by level.

• Example: For the tree [1, 2, 3, null, 5, null, 4], the right view is [1, 3, 4].
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Q1. What is the method to find duplicate characters in a string?
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To find duplicate characters in a string, we can use various methods like hashing or counting occurrences using data structures.
• Using a Hash Map: Iterate through the string, storing each character's count in a hash map. Example: 'hello' -> {'h': 1, 'e': 1, 'l': 2, 'o': 1}.

• Using a Set: Track seen characters in a set. If a character is already in the set, it's a duplicate. Example: 'banana' -> duplicates are 'a' an...read more
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Q2. Find the maximum value in an array.
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To find the maximum value in an array, iterate through the elements and keep track of the highest number encountered.
• Initialization: Start by assuming the first element is the maximum. Example: For [3, 1, 4], initialize max = 3.

• Iteration: Loop through the array, comparing each element to the current maximum. Example: Compare 1 and 4 to max.

• Update: If a larger number is found, update the maximum. Example: max becomes 4 ...read more
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Q3. Describe the different waits in selenium
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Selenium provides different wait strategies to handle dynamic web elements effectively during automation testing.
• Implicit Wait: Sets a default wait time for the entire session, allowing Selenium to poll the DOM for a specified duration before throwing an exception. Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

• Explicit Wait: Allows waiting for a specific condition to occur before proceeding f...read more
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