TOP
Selinium Online Training Interview Questions:
1) What is Selenium and what is composed of?
Selenium is a suite of tools for
automated web testing. It is composed of
·
Selenium
IDE (Integrated Development Environment) : It is a tool for recording and playing back. It is a
firefox plugin
·
WebDriver
and RC: It provide the APIs for a
variety of languages like Java, .NET, PHP, etc. With most of the browsers
Webdriver and RC works.
·
Grid: With the help of Grid you can distribute tests on multiple
machines so that test can be run parallel which helps in cutting down the time
required for running in browser test suites
2) What is Selenium 2.0 ?
Web testing tools Selenium RC and
WebDriver are consolidated in single tool in Selenium 2.0
3) How will you find an element using Selenium?
In Selenium every object or control
in a web page is referred as an elements, there are different ways to find an element
in a web page they are
·
ID
·
Name
·
Tag
·
Attribute
·
CSS
·
Linktext
·
PartialLink Text
·
Xpath etc
4) List out the test types that are supported
by Selenium?
For web based application testing
selenium can be used
The test types can be supported are
a)
Functional
b)
Regression
For post release validation with
continuous integration automation tool could be used
a)
Jenkins
b)
Hudson
c)
Quick Build
d)
CruiseCont
5) Explain what is assertion in Selenium and
what are the types of assertion?
Assertion is used as a
verification point. It verifies that the state of the application
conforms to what is expected. The types of assertion are “assert” ,
“verify” and “waifFor”.
6) Mention what is the use of X-path?
X-Path is used to find the
WebElement in web pages. It is also useful in identifying the dynamic elements.
7) Explain the difference between single and
double slash in X-path?
Single slash ‘/ ’
·
Single slash ( / ) start selection
from the document node
·
It allows you to create ‘absolute’
path expressions
Double Slash ‘// ’
·
Double slash ( // ) start selection
matching anywhere in the document
·
It enables to create ‘relative’ path
expressions
8) List out the technical challenges with
Selenium?
Technical challenges with Selenium
are
·
Selenium supports only web based
applications
·
It does not support the Bitmap
comparison
·
For any reporting related capabilities
have to depend on third party tools
·
No vendor support for tool compared
to commercial tools like HP UFT
·
As there is no object repository
concept in Selenium, maintainability of objects becomes difficult
9) What is the difference between type keys and
type commands ?
TypeKeys() will trigger JavaScript
event in most of the cases whereas .type() won’t. Type key populates the value
attribute using JavaScript whereas .typekeys() emulates like actual user typing
10) What is the difference between verify and
assert commands?
Assert: Assert
allows to check whether an element is on the page or not. The test will stop on
the step failed, if the asserted element is not available. In other words, the
test will terminated at the point where check fails.
Verify: Verify
command will check whether the element is on the page, if it is not then the
test will carry on executing. In verification, all the commands are going
to run guaranteed even if any of test fails.
11) What is JUnit Annotations and what are
different types of annotations which are useful ?
In JAVA a special form of syntactic
meta-data can be added to Java source code, this is know as Annotations.
Variables, parameters, packages, methods and classes are annotated some of the
JUnit annotations which can be useful are
·
Test
·
Before
·
After
·
Ignore
·
BeforeClass
·
AfterClass
·
RunWith
12) While using click command can you use
screen coordinate?
To click on specific part of
element, you would need to use clickAT command. ClickAt command accepts
element locator and x, y co-ordinates as arguments-
clickAt (locator, cordString)
13) What are the advantages of Selenium?
·
It supports C#, PHP, Java, Perl,
Phython
·
It supports different OS like
Windows, Linux and Mac OS
·
It has got powerful methods to
locate elements (Xpath, DOM , CSS)
·
It has highly developer community
supported by Google
14) Why testers should opt for Selenium and not
QTP?
Selenium is more popular than QTP as
·
Selenium is an open source whereas
QTP is a commercial tool
·
Selenium is used specially for
testing web based applications while QTP can be used for testing client server
application also
·
Selenium supports Firefox, IE,
Opera, Safari on operating systems like Windows, Mac, linux etc. however
QTP is limited to Internet Explorer on Windows.
·
Selenium supports many programming
languages like Ruby, Perl, Python whereas QTP supports only VB script
15) What are the four parameter you have to
pass in Selenium?
Four parameters that you have to
pass in Selenium are
·
Host
·
Port Number
·
Browser
·
URL
16) What is the difference between setSpeed()
and sleep() methods?
Both will delay the speed of
execution.
Thread.sleep () : It will stop
the current (java) thread for the specified period of time. Its done only
once
·
It takes a single argument in
integer format
Ex: thread.sleep(2000)- It will wait
for 2 seconds
·
It waits only once at the command
given at sleep
SetSpeed () : For specific
amount of time it will stop the execution for every selenium command.
·
It takes a single argument in
integer format
Ex: selenium.setSpeed(“2000”)- It
will wait for 2 seconds
·
Runs each command after
setSpeed delay by the number of milliseconds mentioned in set Speed
This command is useful for
demonstration purpose or if you are using a slow web application
17) What is same origin policy? How you can
avoid same origin policy?
The “Same Origin Policy” is
introduced for security reason, and it ensures that content of your site will
never be accessible by a script from another site. As per the policy, any
code loaded within the browser can only operate within that website’s domain.
To
avoid “Same Origin Policy” proxy injection method is used, in proxy injection
mode the Selenium Server acts as a client configured HTTP proxy , which sits between
the browser and application under test and then masks the AUT under a fictional
URL
18) What is heightened privileges browsers?
The purpose of heightened privileges
is similar to Proxy Injection, allows websites to do something that are not
commonly permitted. The key difference is that the browsers are launced
in a special mode called heightened privileges. By using these browser
mode, Selenium core can open the AUT directly and also read/write its content
without passing the whole AUT through the Selenium RC server.
19) How you can use “submit” a form using
Selenium ?
You can use “submit” method on
element to submit form-
element.submit () ;
Alternatively you can use click
method on the element which does form submission
20) What are the features of TestNG and list
some of the functionality in TestNG which makes it more effective?
TestNG is a testing framework based
on JUnit and NUnit to simplify a broad range of testing needs, from unit
testing to integration testing. And the functionality which makes it efficient
testing framework are
·
Support for annotations
·
Support for data-driven testing
·
Flexible test configuration
·
Ability to re-execute failed test
cases
21) Mention what is the difference between
Implicit wait and Explicit wait?
Implicit Wait: Sets a timeout for
all successive Web Element searches. For the specified amount of time it will
try looking for element again and again before throwing a
NoSuchElementException. It waits for elements to show up.
Explicit Wait : It is a
one-timer, used for a particular search.
22) 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.findElements(By.xpath(“//iframe”))….
This will return list of frames.
You will ned to switch to each
and every frame and search for locator which we want.
Then break the loop
23) Explain what is the difference between find
elements () and find element () ?
find element ():
It finds the first element within
the current page using the given “locating mechanism”. It returns a
single WebElement
findElements () : Using the given
“locating mechanism” find all the elements within the current page. It
returns a list of web elements.
24) Explain what are the JUnits annotation
linked with Selenium?
The JUnits annotation linked with
Selenium are
·
@Before public void method() – It
will perform the method () before each test, this method can prepare the test
·
@Test public void method() –
Annotations @Test identifies that this method is a test method environment
·
@After public void method()- To
execute a method before this annotation is used, test method must start with
test@Before
25) Explain what is Datadriven framework and
Keyword driven?
Datadriven framework:
In this framework, the test data is separated and kept outside the Test
Scripts, while test case logic resides in Test Scripts. Test data is read
from the external files ( Excel Files) and are loaded into the variables inside
the Test Script. Variables are used for both for input values and for
verification values.
Keyworddriven framework: The keyword driven frameworks requires the development
of data tables and keywords, independent of the test automation. In a
keyword driven test, the functionality of the application under test is
documented in a table as well as step by step instructions for each test.
26) Explain how you can login into any site if
it’s showing any authentication popup for password and username?
Pass the username and password with
url
·
Syntax-http://username:password@url
·
ex- http://creyate:tom@www.gmail.com
27) Explain how to assert text of webpage using
selenium 2.0 ?
WebElement el =
driver.findElement(By.id(“ElementID”))
//get test from element and stored
in text variable
String text = el.getText();
//assert text from expected
Assert.assertEquals(“Element Text”,
text);
28) Explain what is the difference between
Borland Silk and Selenium?
|
Silk Test Tool
|
Selenium Test Tool
|
|
·
Borland Silk test is not a
free testing tool
|
·
Selenium is completely free
test automation tool
|
|
·
Silk test supports only
Internet Explorer and Firefox
|
·
Selenium supports many
browsers like Internet Explorer, Firefox, Safari, Opera and so on
|
|
·
Silk test uses test scripting
language
|
·
Selenium suite has the
flexibility to use many languages like Java, Ruby,Perl and so on
|
|
·
Silk test can be used for
client server applications
|
·
Selenium can be used for only
web application
|
29) What is Object Repository ?
An object repository is an essential
entity in any UI automations which allows a tester to store all object that
will be used in the scripts in one or more centralized locations rather than
scattered all over the test scripts.
30) Explain how Selenium Grid works?
Selenium Grid sent the tests to the
hub. These tests are redirected to Selenium Webdriver, which launch the browser
and run the test. With entire test suite, it allows for running tests in
parallel.
31) Can we use Selenium grid for performance
testing?
Yes. But not as effectively as a
dedicated performance testing tool like Loadrunner.
