Ericsson Senior QA Engineer Interview Questions and Answers

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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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. Java code to find a substring
Ans. 
Java code to find a substring in an array of strings
• Use the contains() method to check if a string contains the substring

• Iterate through the array of strings and check each string for the substring

• Use the indexOf() method to find the index of the substring within the string
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Q2. Write getter setter for the given scenario
Ans. 
Write getter setter for a scenario in a Senior QA Engineer interview
• Create private variables for the data you want to get and set

• Create public getter methods to access the private variables

• Create public setter methods to modify the private variables
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Q1. Introduce yourself and give some brief about work experience
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Q1. What will you do to reduce the log size stored in AWS
Ans. 
Implement log rotation, set up log expiration policies, compress logs, use log aggregation services.
• Implement log rotation to limit the size of individual log files.

• Set up log expiration policies to automatically delete old logs.

• Compress logs before storing them in AWS to reduce storage space.

• Use log aggregation services like AWS CloudWatch Logs to centralize and manage logs efficiently.
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Time frame one hour, 60 questions

Q1. QA life cycle, Selenium basics
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