Paytm Insider Senior QA Engineer Interview Questions and Answers

Basic Java concepts, selenium cases

Q1. Java - Sorting, merging, arrays
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Q1. Compensation, Work experiance
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Q1. Hashmap implementation
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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<String, Integer> map = new HashMap<>(); map.put("apple", 5); int value = ...read more
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Q2. Difference between getWindowHandles and getWindowHandle
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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. Difference between type and typeAndWait
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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
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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
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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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Q1. Explain About your project
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Developed a web application for online shopping with focus on user experience and security.
• Used Selenium for automated testing of UI functionalities

• Implemented API testing using Postman

• Performed security testing to identify vulnerabilities

• Collaborated with developers to ensure quality code delivery
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Q2. What is the recent issues you faced and how you solved.
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Time frame one hour, 60 questions

Q1. QA life cycle, Selenium basics
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Q1. Basic Selenium Java questions and current roles and responsibilities.
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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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Q1. Java code to find a substring
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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
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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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