10+ Interview Questions and Answers

The output of the code will be 'animal is created' followed by 'Dog is created'.

• The code defines a class Animal with a constructor that prints 'animal is created'.

• It also defines a class Dog that extends Animal, with a constructor that prints 'Dog is created'.

• In the main method, an instance of Dog is created, which will trigger the constructors of both Animal and Dog classes.

Option a is valid, option b is valid, option c is invalid.

• Option a is valid because ChromeDriver is a subclass of WebDriver, so it can be assigned to a WebDriver reference.

• Option b is valid because ChromeDriver is a subclass of WebDriver, so it can be instantiated using a WebDriver reference.

• Option c is invalid because WebDriver is an interface and cannot be instantiated directly. It can only be used as a reference type.

getwindowhandle returns the handle of the current window, getwindowhandles() returns handles of all open windows

• getwindowhandle returns a single window handle, while getwindowhandles() returns a set of window handles

• getwindowhandle is used to switch between windows in Selenium WebDriver

• Output type of getwindowhandle is String, while output type of getwindowhandles() is Set

The combined characters in the given testing example 'Testing Testing Testing' is 'te'.

• Iterate through the text and check for consecutive characters 'te'.

• Combine the characters 'te' whenever they are found together.

• Return the combined text 'te' as the result.

Sort input array of strings in descending order without using inbuilt functions

• Iterate through the array and compare each element with the rest to find the largest element

• Swap the largest element with the first element, then repeat the process for the remaining elements

• Continue this process until the array is sorted in descending order

The output will be 'HelloThere'

• Concatenation of 'Hello' and 'There' results in 'HelloThere'

• The final string is printed using System.out.println()

The code creates a StringBuffer object with 'Hello' and appends 'There' to it before printing the final string.

• StringBuffer is mutable, so the original 'Hello' string can be modified

• The append() method adds the specified string to the end of the buffer

• The final output will be 'HelloThere'

String is immutable, while StringBuilder is mutable and more efficient for concatenating strings.

• String is immutable, meaning its value cannot be changed once it is created.

• StringBuilder is mutable, allowing for modifications to the string without creating a new object.

• StringBuilder is more efficient for concatenating multiple strings as it does not create new objects each time.

• Example: String str = "Hello"; StringBuilder sb = new StringBuilder("Hello");

findElement returns the first matching element on the page, while findElements returns a list of all matching elements.

• findElement returns a single WebElement matching the locator provided

• findElements returns a list of WebElements matching the locator provided

• findElement will throw NoSuchElementException if no element is found, while findElements will return an empty list