Tech Mahindra Calling Agent Interview Questions and Answers

A Java program to count the occurrences of the letter 'l' in the string 'Hello world'.

• Create a Java program with a main method.

• Initialize a String variable with the value 'Hello world'.

• Use a loop to iterate through each character in the string and count the occurrences of the letter 'l'.

• Print the count of 'l' at the end.

Reverse the characters of each word in a given string

• Split the input string into an array of words

• Reverse each word in the array

• Join the reversed words back into a single string

Comparator is an interface used to sort objects, while Comparable is an interface used to compare objects for natural ordering.

• Comparator is used to define custom sorting logic for objects, while Comparable is used for natural ordering based on the class's implementation of compareTo() method.

• Comparator can be used to sort objects of different classes, while Comparable is implemented within the class itself.

• Example: So...read more

Lambda expression is a concise way to represent an anonymous function in programming languages.

• Lambda expressions are used to create small, inline functions without a formal definition.

• They are commonly used in functional programming languages like Python, Java, and C#.

• Lambda expressions can be used to simplify code and make it more readable.

• Example: (x, y) -> x + y is a lambda expression that takes two parameters a

Constructor chaining is the process of calling one constructor from another constructor in a class.

• Allows reusing code and avoiding duplication

• Can be achieved using 'this' keyword in the constructor

• Helps in initializing objects with different parameters

Handle notifications in mobile automation by using automation tools to interact with notifications, verify content, dismiss or respond to them.

• Use automation tools like Appium or Espresso to interact with notifications

• Verify the content of notifications by extracting text or images

• Dismiss notifications to continue with test execution

• Respond to notifications if required for test scenarios

• Handle different types of notifi...read more

Use platform-specific locators or conditional statements to handle different element xpaths in iOS and Android apps.

• Use platform-specific locators like accessibility id for iOS and resource id for Android

• Implement conditional statements to switch between different xpaths based on the platform

• Utilize Appium's platformName capability to identify the platform and adjust the element xpath accordingly

TestNG annotations include @Test, @BeforeMethod, @AfterMethod, @BeforeClass, @AfterClass, @BeforeSuite, @AfterSuite

• @Test - denotes a test method

• @BeforeMethod - runs before each test method

• @AfterMethod - runs after each test method

• @BeforeClass - runs before the first test method in the current class

• @AfterClass - runs after the last test method in the current class

• @BeforeSuite - runs before all tests in the suite

• @AfterSu

pom.xml is a configuration file used in Maven projects to define project settings and dependencies.

• pom.xml stands for Project Object Model XML

• It is used in Maven projects to manage project configuration, build settings, and dependencies

• Dependencies are mentioned inside the <dependencies> tag in pom.xml

• Each dependency is specified with <groupId>, <artifactId>, and <version>

Test case for login page using Selenium

• Verify that the login page loads successfully

• Enter valid credentials and verify successful login

• Enter invalid credentials and verify appropriate error message

• Check for password encryption

• Verify the 'Forgot Password' functionality

Java program to find max in array

• Iterate through the array and compare each element to find the maximum value

• Initialize a variable to store the maximum value and update it as needed

• Handle edge cases like empty array or null input