Monocept Interview Questions and Answers

Use try-catch block to handle the exception and provide fallback mechanism

• Wrap the 3rd party operation in a try-catch block

• Catch the specific exception thrown by the operation

• Provide a fallback mechanism to handle the exception

• Log the exception for debugging purposes

Replace odd numbers with their square using stream on a given List of Integers.

• Use stream() method to convert the List of Integers into a stream.

• Use map() method to apply the square function to each odd number.

• Use filter() method to filter out even numbers.

• Use collect() method to convert the stream back to a List.

• Example: List numbers = Arrays.asList(1, 2, 3, 4, 5); numbers.stream().map(n -> n % 2 == 0 ? n : n * n).collect(Collectors.toList());

Choose based on requirements and configuration

• Identify the requirements for the bean

• Check the configuration of both beans

• Choose the bean that meets the requirements and has the appropriate configuration

To make a class Immutable, we need to ensure that its state cannot be modified after creation.

• Make all fields final and private

• Do not provide any setters

• Ensure that any mutable objects are not exposed through getters

• Make the class final or use private constructor to prevent subclassing

• Override equals() and hashCode() methods to ensure that objects can be compared based on their state

The @Qualifier annotation is used to differentiate between beans of the same type, while @Primary is used to give priority to a bean.

• Both annotations are used to resolve ambiguity when multiple beans of the same type are present.

• @Qualifier is used to specify a unique identifier for a bean, which can be used to inject that specific bean.

• @Primary is used to give priority to a bean when multiple beans of the same type are present. If no @Qualifier is specified, the @Primary bean...read more

Spring is a framework for building Java applications, while Spring Boot is a tool for simplifying and automating the configuration of Spring applications.

• Spring provides a comprehensive framework for building Java applications, including features such as dependency injection, AOP, and MVC.

• Spring Boot is built on top of Spring and provides a streamlined way to configure and run Spring applications, with features such as auto-configuration and embedded servers.

• Spring Boot reduc...read more

Singleton pattern restricts the instantiation of a class to one object.

• Used when only one instance of a class is required throughout the application

• Provides a global point of access to the instance

• Implemented by making the constructor private and providing a static method to access the instance

• Example: java.lang.Runtime#getRuntime()

• Example: Database connection pool

Annotations are a form of metadata that provide additional information about code.

• Annotations are denoted by the '@' symbol and can be applied to classes, methods, fields, and parameters.

• They can be used to provide information to the compiler, tools, and runtime environments.

• Examples of annotations include @Override, @Deprecated, and @SuppressWarnings.

• Annotations can also be used to create custom annotations for specific use cases.