Informatica Senior QA Engineer Interview Questions and Answers

Q1. Given a String contains only 0s, 1s and 2s, count the number of sub strings that have equal number of 0s, 1s, and 2s. Input : str = "0102010" output : 2. Very Hard question is being asked in interview for...read more
Ans. 
Count the number of substrings with equal number of 0s, 1s, and 2s in a given string.
• Iterate through the string and maintain counts of 0s, 1s, and 2s encountered so far.

• Keep track of the counts in a hashmap and increment the count of substrings whenever counts of 0s, 1s, and 2s are equal.

• Return the total count of substrings at the end.
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Q2. Group of anagrams together. input : ["eat", "tea", "tan", "ate", "nat", "bat"] output : [["eat" ,"tea", "ate"],["tan", "nat"],["bat"]] This is another hard level question is asked in interview for the QA p...read more
Ans. 
Group anagrams together in an array of strings.
• Create a hashmap to store sorted strings as keys and corresponding anagrams as values.

• Iterate through the input array, sort each string, and add it to the hashmap.

• Return the values of the hashmap as the grouped anagrams.
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Q1. About Project , daily routines , SQL, unix
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Q2. On core java programs on arrays, strings etc
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Q1. Java related qs
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Q1. If 2 threads are given and one burns in 30 minutes, how you can count 45 minutes
Ans. Burn 1 thread at one end another at both ends
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Q2. OOPS concepts explain in practical manner
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OOPS concepts are fundamental to software engineering. They help in creating modular, reusable, and maintainable code.
• Encapsulation: Hiding implementation details and exposing only necessary information.

• Inheritance: Reusing code and creating a hierarchy of classes.

• Polymorphism: Ability of objects to take on multiple forms.

• Abstraction: Focusing on essential features and ignoring implementation details.

• Example: A car is ...read more
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Q3. Selenium practical based questions
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Q1. Reason behind leaving current company
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Q2. Financial growth, technical growth
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Simple Java questions on string and arrays

Framework level knowledge is checked

Q1. Salary negotiation
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Q1. Handle objects in webtable
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To handle objects in a webtable, you can use methods like findElement, getText, getAttribute, etc.
• Use findElement method to locate the object in the webtable

• Use getText method to retrieve the text of the object

• Use getAttribute method to get specific attribute value of the object

• Iterate through rows and columns to handle multiple objects in the webtable
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Q2. Multiple window handles
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Multiple window handles allow a QA engineer to interact with multiple browser windows during testing.
• Window handles are unique identifiers assigned to each browser window opened by the application.

• QA engineers can switch between window handles to perform actions on different windows.

• Example: driver.getWindowHandles() in Selenium returns a set of window handles.

• Example: driver.switchTo().window(handle) is used to switch
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