Coforge Senior QA Engineer Interview Questions and Answers

This program identifies and prints duplicate characters from a given string input.

• Use a hash map or dictionary to count occurrences of each character.

• Iterate through the string and update the count for each character.

• After counting, filter characters that have a count greater than 1.

• Example: For input 'programming', output should be 'g', 'r'.

• Consider case sensitivity: 'A' and 'a' should be treated as different cha...read more

You can obtain the page source of a website using Selenium by calling the getPageSource() method.

• Instantiate a WebDriver object for the desired browser

• Navigate to the website using get() method

• Use getPageSource() method to retrieve the page source

XPaths are used in testing to locate elements on a web page for automation testing purposes.

• XPaths are used to locate elements based on their attributes, such as ID, class, name, etc.

• Absolute XPaths start with the root node and specify the complete path to the element.

• Relative XPaths start from the current node and specify the path to the element relative to the current node.

• XPaths can also be used to locate eleme...read more

This task involves reversing the characters of a string after sorting them in alphabetical order.

• Convert the string to a character array.

• Sort the character array alphabetically.

• Reverse the sorted character array.

• Convert the reversed array back to a string.

• Example: 'banana' -> ['a', 'a', 'b', 'n', 'n'] -> ['n', 'n', 'b', 'a', 'a'] -> 'nnbaa'

Java method to remove duplicate values from an array of strings efficiently.

• Use a HashSet to store unique values: HashSet<String> uniqueStrings = new HashSet<>(Arrays.asList(array));

• Convert back to array: String[] result = uniqueStrings.toArray(new String[0]);

• Example: Input: {'apple', 'banana', 'apple'}, Output: {'apple', 'banana'}

• Stream API can also be used: Arrays.stream(array).distinct().toArray(Str...read more

Use a program to handle JavaScript callback functions.

• Create a function that takes a callback function as a parameter

• Invoke the callback function within the main function

• Pass arguments to the callback function if needed

Create a counter using JavaScript

• Declare a variable to store the count

• Create a function to increment the count

• Display the count on the webpage

Correlation in performance testing, AWS knowledge, parametrization vs correlation, challenges in correlation, motivating new customers for performance testing, using perfmon, rampup/rampdown/steady state, concurrent vs simultaneous users, matrices in HTML report

• Correlation in performance testing ensures that the response time of different components in a system are correlated to each other

• AWS knowledge is importan...read more