面试题_Selenium

1.What is selenium composed of?

• Selenium IDE: is a tool for recording and playing back
• WebDriver: It provide the APIs for variety of languages like java,.NET,php.
• Grid: With the help of Grid you can distribute test on multiple machines.

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2.How many ways does Selenium provide to find a element?

• ID
• Name
• Tag
• Xpath
• CSS
• Attribute
• Linktext
• PartialLinkText

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3.Explain the single and double slash in xpath.

• single slash enables to create absolute path expression which means need to start selection from the document node
• double slash enables to create relative path expression which means it can match elements anywhere from document

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4.Use xpath to identify the “input” Web element in bold in below html code

<div id="div1">    <input name="input1" class="div1"/>    <input name="input2" class="div1"/></div><div id="div2">    <input name="input1" class="div2"/>    <input name="input2" class="div2"/> <!--查找该元素--></div>

• //div[@id=’div2’]/input[@name=’input2’]
• //input[@id=’div2’ and class=’div2’]

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5.What is difference between verify and assert commands?

• Assert: Assert allows to check whether an element is on the page or not. The test will terminate at the point if the assert fails.
• Verify: Verify command will check whether an element is on a page too, but the test will continue even if it fails

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6.What si the difference between setSpeed() and sleep() method?

• Both will delay the speed of execution
• Thread.sleep(): It will stop the current java thread for the specified period of time
• setSpeed(): For specific amount of time it will stop the execution of every selenium command

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7.How you can use “submit” a form using Selenium?

• You can use submit() method for the element in form, like element.submit();
• Or you can just use click() method for the submit button, like Btn.click();
  

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8.What are the features of TestNG and list some of the functionalities.

TestNG is a testing framework for Unit test and Integration test
- Support for annotations
- Support for data driven testing
- Flexible test configurations

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9.Which attribute you should consider throughout the script in frame for ” if no frame id as well as no frame name”?

You can use driver.findEelements(By.xpath(“//iframe”)); or By.tag(“iframe”)
This will return a list of iframe elements.
Create a loop to find which one you need and break the loop

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10.How can you perform double click for an element?

Actions action = new Actions(driver);action.doubleClick(element).perform();

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11.How to choose a option in a selection?

Select select = new Select(driver);select.selectByIndex(index);select.selectByValue(value);select.selectByVisableText(text);

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12.Explain Page Object pattern in Selenium.

A page object pattern is object-orientation class that servers as an interface to a page.

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13.Can Selenium find element with (display=none)? If yes, please explain how to do it.

JavascriptExecutor js = (JavascriptExecutor) mDriver;js.executeScript("argument[0].style.display='block'");

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14.How many ways for Selenium to wait for element in page?

Implicit wait & explicit wait

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15.How to move between windows and frames?

driver.switchTo().window();drivr.switchTo().frame();

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16.Write a sql statement to draw second highest salary in Employee table.

Table structure is : Employee ID, Name, Salary

select max(salary)from Employeewhere salary NOT IN (                    select max(salary)                     from Employee                    )

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17.Given a table SALARIES such as the one below , that has m= male and f = female values. Swap all f and m values with a single update.

UPDATE SALARIES SET gender = (                        case gender when 'm' then 'f'                        else 'm'                        end                        )

UPDATE SALARIES SET gender = decode(gender                                    'm','f',                                    'm')

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