selenium interview questions

 1. handle dynamic web elements in Selenium

• use relative xpath or css selector
• identify element based on surrounding elements
• dynamic locator, e.g. contains(), startwith(), regex

2. assert vs. verify

• verify does not stop the execution

3. handle popup, tab, window

• get the handle, then switch to

4. upload and download

• upload: sendkey() with filepath, or use AutoIT or Robot class
• download: set some preferences, click download link

5. cookies

• getCookies()
• addCookie()
• deleteCookie()

6. implicit wait, explicit wait, fluent wait

• use explicit wait instead of implicit wait, DO NOT mix them together at same time
• implicit wait poll the DOM for specified amount of time before trying to locate element
• implicit wait is disabled by default and need to be enabled
• explicit wait wait for certain condition to happen
• fluent wait is a customised explicit wait

7. action

• mouse and keyboard actions
• mouse: doubleClick(), clickAndHold(), dragAndDrop(), moveToElement(), contextClick()
• keyboard: sendKeys(), keyUp(), keyDown()

8. driver close vs quit

• close: close current window
• quit: quit session

9. alert and popup

• alert: switchTo().alert()..dismiss()/.accept()/.sendKeys()

10. account login

• navigate to login page
• use api call to get auth token, then set browser cookie
• refresh page, or navigate to the after-login page

11. selenium grid

• hub is an instance of selenium server with config to distribute test
• node is an instance of selenium server with browser capabilities that the node supports

12. handle iframe

reference

1. how to handle iFrame in selenium