Tutorial #33 – Selenium Interview Questions and Answers

AlexQin

Q #40) What is TestNG and how is it better than Junit?

TestNG is an advance framework designed in a way to leverage the benefits by both the developers and testers. With the commencement of the frameworks, JUnit gained an enormous popularity across the Java applications, Java developers and Java testers with remarkably increasing the code quality. Despite being easy to use and straightforward, JUnit has its own limitations which give rise to the need of bringing TestNG into the picture. TestNG is an open source framework which is distributed under the Apache software License and is readily available for download.

TestNG with WebDriver provides an efficient and effective test result format that can in turn be shared with the stake holders to have a glimpse on the product’s/application’s health thereby eliminating the drawback of WebDriver’s incapability to generate test reports. TestNG has an inbuilt exception handling mechanism which lets the program to run without terminating unexpectedly.

There are various advantages that make TestNG superior to JUnit. Some of them are:

• Added advance and easy annotations
• Execution patterns can set
• Concurrent execution of test scripts
• Test case dependencies can be set
  

AlexQin

Q #41) How to set test case priority in TestNG?

Setting Priority in TestNG

Code Snippet

1. package TestNG;
   
2. import org.testng.annotations.*;
   
3. public class SettingPriority {
   
4.       @Test(priority=0)
   
5.       public void method1() {
   
6.       }
   
7.       @Test(priority=1)
   
8.       public void method2() {
   
9.       }
   
10.       @Test(priority=2)
    
11.       public void method3() {
    
12.       }
    
13. }

复制代码

Test Execution Sequence:

• Method1
• Method2
• Method3
  

AlexQin

Q #42) What is a framework?

Framework is a constructive blend of various guidelines, coding standards, concepts, processes, practices, project hierarchies, modularity, reporting mechanism, test data injections etc. to pillar automation testing.

AlexQin

Q #43) What are the advantages of Automation framework?

Advantage of Test Automation framework

• Reusability of code
• Maximum coverage
• Recovery scenario
• Low cost maintenance
• Minimal manual intervention
• Easy Reporting
  

AlexQin

Q #44) What are the different types of frameworks?

Below are the different types of frameworks:

• Module Based Testing Framework: The framework divides the entire “Application Under Test” into number of logical and isolated modules. For each module, we create a separate and independent test script. Thus, when these test scripts taken together builds a larger test script representing more than one module.
• Library Architecture Testing Framework: The basic fundamental behind the framework is to determine the common steps and group them into functions under a library and call those functions in the test scripts whenever required.
• Data Driven Testing Framework: Data Driven Testing Framework helps the user segregate the test script logic and the test data from each other. It lets the user store the test data into an external database. The data is conventionally stored in “Key-Value” pairs. Thus, the key can be used to access and populate the data within the test scripts.
• Keyword Driven Testing Framework: The Keyword driven testing framework is an extension to Data driven Testing Framework in a sense that it not only segregates the test data from the scripts, it also keeps the certain set of code belonging to the test script into an external data file.
• Hybrid Testing Framework: Hybrid Testing Framework is a combination of more than one above mentioned frameworks. The best thing about such a setup is that it leverages the benefits of all kinds of associated frameworks.
• Behavior Driven Development Framework: Behavior Driven Development framework allows automation of functional validations in easily readable and understandable format to Business Analysts, Developers, Testers, etc.
  

AlexQin

Q #45) How can I read test data from excels?

Test data can efficiently be read from excel using JXL or POI API. See detailed tutorial here.

AlexQin

Q #46) What is the difference between POI and jxl jar?

#	JXL jar	POI jar
1	JXL supports “.xls” format i.e. binary based format. JXL doesn’t support Excel 2007 and “.xlsx” format i.e. XML based format	POI jar supports all of these formats
2	JXL API was last updated in the year 2009	POI is regularly updated and released
3	The JXL documentation is not as comprehensive as that of POI	POI has a well prepared and highly comprehensive documentation
4	JXL API doesn’t support rich text formatting	POI API supports rich text formatting
5	JXL API is faster than POI API	POI API is slower than JXL API

AlexQin

Q #47) What is the difference between Selenium and QTP?

Feature	Selenium	Quick Test Professional (QTP)
Browser Compatibility	Selenium supports almost all the popular browsers like Firefox, Chrome, Safari, Internet Explorer, Opera etc	QTP supports Internet Explorer, Firefox and Chrome. QTP only supports Windows Operating System
Distribution	Selenium is distributed as an open source tool and is freely available	QTP is distributed as a licensed tool and is commercialized
Application under Test	Selenium supports testing of only web based applications	QTP supports testing of both the web based application and windows based application
Object Repository	Object Repository needs to be created as a separate entity	QTP automatically creates and maintains Object Repository
Language Support	Selenium supports multiple programming languages like Java, C#, Ruby, Python, Perl etc	QTP supports only VB Script
Vendor Support	As Selenium is a free tool, user would not get the vendor’s support in troubleshooting issues	Users can easily get the vendor’s support in case of any issue

AlexQin

Q #48) Can WebDriver test Mobile applications?

WebDriver cannot test Mobile applications. WebDriver is a web based testing tool, therefore applications on the mobile browsers can be tested.

AlexQin

Q #49) Can captcha be automated?

No, captcha and bar code reader cannot be automated.