QBurst Technologies Interview Questions, Process, and Tips

configure method is used to set up an object while configure service method is used to set up a service.

• configure method is used to set up an object before it is used

• configure service method is used to set up a service before it is used

• configure method is used in objects like HTTP request pipeline, while configure service method is used in services like authentication

• configure method is called once during application s...read more

Count the occurrence of each word in a given string and store it in a map.

• Split the string into words using whitespace as delimiter

• Create a map to store the word count

• Iterate through the words and update the count in the map

• Return the map

Class not found and no class definition found exception occurs when a required class is not found during runtime.

• This exception occurs when the JVM tries to load a class but cannot find it in the classpath.

• It can happen if the class is missing from the project dependencies or if the classpath is not properly configured.

• Check if the class is present in the correct package and if it is included in the project dependencie...read more

Annotations are used in Spring Boot for various purposes such as mapping requests, defining beans, and handling exceptions.

• Annotations are used to provide metadata to the Spring framework.

• They are used to map requests to controller methods using @RequestMapping.

• Annotations like @Component, @Service, and @Repository are used to define beans.

• Annotations like @ExceptionHandler and @ControllerAdvice are used for handling e...read more

Singleton class is a class that allows only one instance of itself to be created and provides a global point of access to it.

• Singleton class restricts the instantiation of a class to a single object.

• It is used when only one instance of a class is required to control actions throughout the system.

• The Singleton pattern is implemented by creating a class with a method that creates a new instance of the class if one doesn'...read more

Java 8 introduced several new features including lambda expressions, streams, and default methods.

• Lambda expressions for functional programming

• Streams for efficient processing of large data sets

• Default methods to add new functionality to interfaces

• Date and Time API for improved handling of date and time

• Nashorn JavaScript engine for improved performance

• Parallel array sorting for faster sorting of large arrays

Functional interface is an interface with only one abstract method.

• Functional interface can have any number of default or static methods

• It is used for lambda expressions and method references

• Examples include Runnable, Comparator, and Function interfaces

JVM is an environment to run Java programs, JRE is a runtime environment, and JDK is a development kit.

• JVM stands for Java Virtual Machine and is responsible for executing Java bytecode.

• JRE stands for Java Runtime Environment and provides a runtime environment for Java programs.

• JDK stands for Java Development Kit and includes tools for developing Java applications.

• JDK includes JRE and additional development tools such ...read more

Design patterns are reusable solutions to common software development problems.

• Design patterns provide a common language for developers to communicate about solutions to common problems.

• They can improve the quality, maintainability, and scalability of software.

• Examples include the Singleton pattern, Factory pattern, and Observer pattern.

• Design patterns can be categorized into three groups: creational, structural, and b

List is an ordered collection of elements while Set is an unordered collection of unique elements.

• List allows duplicate elements while Set does not.

• List maintains the order of elements while Set does not.

• List is implemented using an array while Set is implemented using a hash table.

• Example: List - [1, 2, 3, 3, 4], Set - {1, 2, 3, 4}

To get data from a file in Selenium, we can use Java IO classes and read the file content.

• Create a File object with the file path

• Create a FileReader object with the File object

• Create a BufferedReader object with the FileReader object

• Use the BufferedReader object to read the file content line by line

• Close the BufferedReader object

Alpha testing and beta testing are two types of software testing performed before releasing the software to the public.

• Alpha testing is performed by the developers in-house, before releasing the software to external testers.

• Beta testing is performed by external testers, after the software has been released to a limited audience.

• Alpha testing is focused on identifying bugs and issues in the software, while beta testing ...read more

A test case can be excluded from execution by using tags or annotations.

• Add a tag or annotation to the test case with a specific value

• Configure the test runner to exclude test cases with that tag or annotation

• Use conditional statements in the test code to skip the test case based on certain conditions

Test case can be executed multiple times using automation tools or by manually running the test case.

• Use automation tools like Selenium or Appium to execute test cases multiple times.

• Create a loop in the automation script to execute the test case multiple times.

• Manually execute the test case multiple times by following the steps in the test case document.

• Use data-driven testing to execute the same test case with differ...read more

Diagonal elements of a 3*3 matrix

• A diagonal element is the element that lies on the diagonal of a square matrix

• In a 3*3 matrix, the diagonal elements are the elements at (1,1), (2,2), and (3,3)

• The diagonal elements can be found by indexing the matrix using the same row and column number

Beans in Spring Boot are Java objects that are managed by the Spring IoC container.

• Beans are defined in the Spring configuration file or using annotations like @Component, @Service, @Repository, etc.

• Beans are singleton by default, but can be configured as prototype scope.

• Beans are instantiated, assembled, and managed by the Spring IoC container.

• Beans can have dependencies injected using @Autowired annotation.

• Example: @

Java OOPs concepts include inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation involves bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism allows objects to be treated as instances of thei...read more