Logical Qn : Assume that you have 25 horses, and you want to pick the fastest 3 horses out of those 25. In each race, only 5 horses can run at the same time because there are only 5 tracks. What is the minimum number of races required to find the 3 fastest horses without using a stopwatch?

After analyzing a bit, Here are the pointers.
- We need to put all the horses into a race ( 5 at a time ) to find out the best 3 performers.
- Maximum 5 Horses in a race, so 5 times we need to conduct.
- After 5 Races, below is the table we can draw "ORDER by best performer"

Race1H1  -  Race2H6 -  Race3H11 -  Race4H16 -  Race5H21
Race1H2  -  Race2H7 -  Race3H12 -  Race4H17 -  Race5H22
Race1H3  -  Race2H8 -  Race3H13 -  Race4H18 -  Race5H23
Race1H4  -  Race2H9 -  Race3H14 -  Race4H19 -  Race5H24
Race1H5  -  Race2H10 -Race3H15 -  Race4H20 -  Race5H25

Our Aim is to find the best three performers. so, we can eliminate last two rows.
Reason: We are least bothered about 4th and 5th best in each race.
They can not be one among top three performers.

Our Target table is

Race1H1  -  Race2H6 -  Race3H11 -  Race4H16 -  Race5H21
Race1H2  -  Race2H7 -  Race3H12 -  Race4H17 -  Race5H22
Race1H3  -  Race2H8 -  Race3H13 -  Race4H18 -  Race5H23

Now Race # 6: all top players in each race:
i.e
Race1H1  -  Race2H6 -  Race3H11 -  Race4H16 -  Race5H21

Assume results are, 1st place Race1H1  ; 2nd place Race2H6 ; 3rd place Race3H11


Now Race # 7: will gives the 2nd and 3rd place horse.
i.e we need to conduct a race with below set.
                 -  Race2H6 -  Race3H11
Race1H2  -  Race2H7
Race1H3

why we eliminated other horses?

Elimination Set # 1
Race4H16 -  Race5H21
Race4H17 -  Race5H22
Race4H18 -  Race5H23

Reason: As 3rd best horse is Race3H11. so, above set is definitely is not in 1,2,3 positions.

Elimination Set # 2
Race3H12
Race3H13

Reason: same as above.

Elimination Set # 3
Race2H8

Reason: as Race1H1 is 1st , there may be chance for 2nd is Race1H2 or Race2H6
chance for 3rd is Race1H3, Race2H6, Race2H7, Race3H11
but not Race2H8

so, Answer is 7



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Integrating AutoIt with Selenium

What is AutoIt:

       AutoIt is freeware scripting language for automating the windows GUI.

      

Why is AutoIt:

       When you start working with web-application so many time you will get window based pop-up like- file upload, download pop up, window authentication etc. In this case Selenium fails and will not be able to handle desktop elements to avoid this we will use AutiIt script that will handle desktop or windows elements and will combine AutoIt script with our Selenium code.

Setup / Configuration:

Download and Install AutoIt software and Editor here

https://www.autoitscript.com/site/autoit/downloads/

Install the software.

IMAGE 2:

Search for “sciTE Script Editor” or “SciTE.exe” in RUN dialog.

Problem statement:

Automate file upload feature in http://www.dropzonejs.com/

We know how to write selenium code until we click upload button and here is the code.

public static void main(String[] args) throws InterruptedException, IOException {

             

              String baseUrl = "http://www.dropzonejs.com/";

              driver = new FirefoxDriver();

              driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS);

              driver.get(baseUrl);

              driver.manage().window().maximize();

              Thread.sleep(6000);             

              driver.findElement(By.id("demo-upload")).click();

              Thread.sleep(3000);

       }

Now, we need to select a file from windows explorer and Selenium cannot do it for obvious reasons.

But, we can achieve this using AutoIt.

Here is the AutoIt script:

; Wait 10 seconds for the Upload window to appear

  WinWait("[CLASS:#32770]","",10)

; Set input focus to the edit control of Upload window using the handle returned by WinWait

  ControlFocus("File Upload","","Edit1")

  Sleep(2000)

; Set the File name text on the Edit field

  ControlSetText("File Upload","","Edit1","C:\Users\testUser\Downloads\A.jpg")

  Sleep(2000)

; Click on the Open button

  ControlClick("File Upload", "","Button1");

Explanation:

WinWait pauses execution of the script until the requested window existed

Now, we need to understand how to locate the file upload windows explorer.

Open      Au3Info.exe (Window Info tool), select Finder tool and point to file upload windows explorer to locate it.

We have two parts in ‘Window Info tool’, one is ‘Basic window Info’ and other is ‘Basic Control Info’.

As we are dealing with windows explorer wait, lets concentrate on ‘Basic window info’, notice about CLASS id to locate the window as ([CLASS:#32770])

Similarly we can locate each and every windows explorer element.

Few Methods to remember:

ControlFocus Sets input focus to a given control on a window.

ControlSetText Sets text of a control.

ControlClick  Sends mouse click command to a given control.

SAVE the file:

Save AutoIt script file as with ‘.au3’ extension.  Ex: one.au3

Compiling au3 script file:

Right click on one.au3 file and select compile script option.

A new file named one.exe will be generated.

Integrating AutoIt

with Selenium:

public static void main(String[] args) throws InterruptedException, IOException {

             

              String baseUrl = "http://www.dropzonejs.com/";

              driver = new FirefoxDriver();

              driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS);

              driver.get(baseUrl);

              driver.manage().window().maximize();

              Thread.sleep(6000);

             

              driver.findElement(By.id("demo-upload")).click();

              Thread.sleep(3000);

             

              Runtime.getRuntime().exec("E:/one.exe");       

       }     

Just run the script, that’s all.

NOTE: We do not need to add any jars to the project for this to run.

What is abstract ? in OOP Language

You declare a class to be abstract by saying something like:

abstract class Base
{
}

Why would you do this?

To stop it being instantiated.

You cannot then say
Base b = new Base();

But, you can instantiate concrete sub-classes of Base.

Why would you want to stop it being instantiated?

Usually because it is too general.

For example, you might define a class Animal and concrete subclasses of Bird, Cat and Dog.

In the real world you can have Cats and Dogs but not Animals which are not some type of Animal.

Using abstract lets you model this situation.

My First Blog!

My First Blog!