Infosys Senior QA Engineer Interview Questions and Answers for Experienced

Basic Aptitude questions. Candidate with average knowledge can crack it.

Two programming questions were asked. Difficulty level was medium.

Q1. Technical questions related to programming.
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Q1. HR type questions
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Q1. Hashmap implementation
Ans. 
Hashmap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• Hashmap is implemented using an array of linked lists or buckets to handle collisions.

• Each key is hashed to determine its index in the array.

• Common operations include put(key, value), get(key), and remove(key).

• Example: HashMap map = new HashMap<>(); map.put("apple", 5); int value = map.get("app
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Q2. Difference between getWindowHandles and getWindowHandle
Ans. 
getWindowHandles returns all open window handles, getWindowHandle returns handle of current window
• getWindowHandles returns a set of all window handles currently open in the browser

• getWindowHandle returns the handle of the current window being focused on

• Example: driver.getWindowHandles() vs driver.getWindowHandle()
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Q1. Match 14 characters before @ , given an url
Ans. 
Extract the 14 characters before @ in a given URL
• Use string manipulation to extract characters before @ symbol

• Consider edge cases like no @ symbol or less than 14 characters before @

• Handle special characters like %20 or %40
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Q2. Match Atleast one capital, once small case, 1 digit and 1 special character using regex?
Ans. 
Regex pattern to match at least one capital letter, one small case letter, one digit, and one special character.
• Use the regex pattern: (?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[^A-Za-z0-9])

• Example: Password@123
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Q3. Given a string ="This is my interview for QA engineer"; write code to give an output of each word with vowel count?
Ans. 
Code to output each word with vowel count in a given string.
• Split the string into words using space as delimiter

• Iterate through each word and count the number of vowels

• Store the word and its vowel count in an array of strings
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Q4. Given a 2X2 Matrix, find the maximum diagonal sum?
Ans. 
To find the maximum diagonal sum in a 2X2 Matrix, sum the elements of the main diagonal and the opposite diagonal.
• Sum the elements of the main diagonal (top left to bottom right) and the opposite diagonal (top right to bottom left).

• Compare the sums of both diagonals and return the maximum sum.

• Example: For a 2X2 Matrix [[1, 2], [3, 4]], the main diagonal sum is 1+4=5 and the opposite diagonal sum is 2+3=5. The maximum d
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Q5. How do you find the selected option text from dropdown in selenium?
Ans. 
To find the selected option text from a dropdown in Selenium, you can use the getFirstSelectedOption() method.
• Use the Select class to work with dropdown elements in Selenium

• Use the getFirstSelectedOption() method to get the selected option

• Retrieve the text of the selected option using getText() method
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Q6. Given a dropdown contains options with duplicates. Find those duplicates along with its occurrence/frequency?
Ans. 
Find duplicates in a dropdown along with their occurrence/frequency.
• Iterate through the dropdown options and store each option in a hashmap with its frequency.

• Identify options with frequency greater than 1 as duplicates.

• Return the duplicates along with their occurrence/frequency.
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Q7. How do you resolve merge conflicts in git?
Ans. 
Resolve merge conflicts in git by using git commands and tools.
• Pull the latest changes from the remote repository

• Use 'git status' to identify conflicting files

• Open the conflicting files and manually resolve the conflicts

• Add the resolved files to the staging area using 'git add'

• Commit the changes with a merge message using 'git commit'
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Q8. How to bring specific commit changes to your branch?
Ans. 
Use git cherry-pick command to bring specific commit changes to your branch.
• Identify the commit hash of the specific changes you want to bring to your branch.

• Checkout to the branch where you want to apply the changes.

• Use 'git cherry-pick <commit-hash>' command to apply the specific commit changes to your branch.
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Q9. How to switch to frame and come out of it in selenium?
Ans. 
To switch to a frame in Selenium, use driver.switchTo().frame() method. To come out of a frame, use driver.switchTo().defaultContent() method.
• Use driver.switchTo().frame() method to switch to a frame

• Use driver.switchTo().defaultContent() method to come out of a frame

• Example: driver.switchTo().frame("frameName");

• Example: driver.switchTo().defaultContent();
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Q1. Difference between type and typeAndWait
Ans. 
typeAndWait is used to wait for a specific element to appear before proceeding, while type does not wait.
• typeAndWait is used in Selenium WebDriver to wait for a specific element to appear before typing into it

• type does not wait for the element to appear and may cause errors if the element is not present

• typeAndWait is useful for dynamic web pages where elements may take time to load
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Q2. How to change window size in selenium
Ans. 
To change window size in Selenium, you can use the set_window_size() method of the WebDriver class.
• Use driver.set_window_size(width, height) to change the window size

• Specify the width and height in pixels as parameters

• Example: driver.set_window_size(800, 600) will set the window size to 800x600 pixels
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Q1. Different listeners in TestNG
Ans. 
TestNG provides different listeners to customize test execution and reporting.
• TestNG provides several built-in listeners such as IInvokedMethodListener, ITestListener, ISuiteListener, etc.

• Listeners can be used to perform actions before or after test methods, suites, or entire test runs.

• Listeners can be implemented by creating classes that extend the corresponding listener interfaces.

• Listeners can be configured in the t...read more
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Interviewer gave a java program and asked output.

Basic selenium automation coding question and QA related MCQs

Q1. Core java and selenium and Qs related to Leading the QA team
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Q2. Count duplicates in a string
Ans. 
Count duplicates in a string
• Iterate through the string and store each character in a hashmap with its count

• Return the count of characters with count greater than 1
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Q3. Write a Program to Sort Array
Ans. 
Program to sort array of strings
• Use a sorting algorithm like bubble sort, selection sort, or merge sort

• Compare strings using strcmp() function in C or compareTo() method in Java

• Handle edge cases like empty array or array with only one element
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Q4. Selenium Commands
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Q1. Salary Negotiation
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Q1. Selenium framework level questions
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Q2. ETL questions & Data warehouse concepts
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Q3. Functional/ manual testing related questions
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Q1. Few technical questions & generic questions
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Q2. CTC & Experience & expected CTC & Notice period, etc
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Q1. 1.Actions 2.Alerts 3.diff between string buffer and string builder 4. diff between hash map and hash table 5.program to find index of character in string 6.program to find character occurrences in a string...read more
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