o9 Solutions QA Engineer Interview Questions and Answers

Q1. Oops concepts is mandatory
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Q2. Print only duplicate values from a String Without using for loop, use do-while
Ans. 
Print duplicate values from a String using do-while loop
• Create a HashSet to store unique values

• Use a do-while loop to iterate through the String

• Check if the HashSet already contains the current character, if yes, print it as a duplicate
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Q3. Core Java oops concepts
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Q1. Reverse a string= "Ecommerce"
Ans. 
To reverse a string 'Ecommerce', you can iterate through the characters in the string and build a new string in reverse order.
• Iterate through the characters of the string from end to start

• Append each character to a new string to build the reversed string

• Return the reversed string as the result
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Q2. Print only duplicate values from a string
Ans. 
Print duplicate values from a string as an array of strings
• Iterate through each character in the string

• Use a hashmap to store the frequency of each character

• Print characters with frequency greater than 1 as duplicates
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Q3. Selenium web driver related, Open amazon or Facebook website, u need to find the xpath for dates or dropdowns, and using contains
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Q1. Basic selenium, rest assured,java small programs.
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Q1. Java collections, different api methods and response code.selenium code to find broken links in a web page.
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Q1. They will ask other questions other than what you have mention in you CV
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Q2. They will ask other questions other that what you have mentioned in your CV
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Q3. None................
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Q4. None..................
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Q5. None...................
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Was easy, basic fundamentals

Q1. Asked questions on resume and DevOps and basic array questions
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Q1. Asked questions regarding projects and dsa
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Q1. Managerial round
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Quite tough and interesting and good questions

Quite tough and interesting and goodnpanel of members

Q1. Java program to split alpha-numeric values without using the split method
Ans. 
Split alpha-numeric values in Java without using split method
• Iterate through each character in the input string

• Check if the character is a digit or a letter using Character.isDigit() and Character.isLetter() methods

• Create separate strings for digits and letters and store them in an array
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Q2. SQL query to add a new column to a table and the column value should have a default value and never be null
Ans. 
Use ALTER TABLE statement to add a new column with a default value and set it to NOT NULL
• Use ALTER TABLE table_name ADD column_name data_type DEFAULT default_value NOT NULL;

• Example: ALTER TABLE employees ADD hire_date DATE DEFAULT '2022-01-01' NOT NULL;
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Q1. Questions asked related to SQL and manual testing
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Q1. Asked questions related to java selenium and manual testing
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Q1. Few technical and few behavioural questions were asked
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