Assistant Consultant and Developer Interview Questions and Answers

We used SonarQube and Checkstyle for static code analysis in the current project.

• SonarQube was used to analyze code quality and identify bugs, vulnerabilities, and code smells.

• Checkstyle was used to enforce coding standards and conventions.

• Both tools were integrated into our CI/CD pipeline for continuous analysis and improvement.

• We also used PMD for additional code analysis and to identify potential performance issues.

Docker provides advantages such as portability, scalability, and isolation.

• Docker allows for easy portability of applications across different environments.

• Docker enables efficient use of resources and scalability through containerization.

• Docker provides isolation between applications and their dependencies, reducing conflicts and improving security.

• Docker simplifies the deployment process and allows for faster iteration and updates.

• Docker can also improve collaboration betwe...read more

Active link triggers an action when a specified condition is met, while filter restricts data based on specified criteria.

• Active link is used to trigger actions like sending notifications or updating records based on certain conditions

• Filter is used to restrict data displayed or processed based on specified criteria

• Active link is proactive in nature, while filter is reactive

• Example: An active link can be set up to send an email notification when a new ticket is created, while...read more

Transactional is a way to ensure data consistency in a database. Required and Requires_New are two types of transactional propagation.

• Transactional ensures that a group of database operations are treated as a single unit of work.

• Required propagation means that the transaction will join an existing transaction if one exists, otherwise a new transaction will be created.

• Requires_New propagation means that a new transaction will always be created, even if an existing transaction ...read more

Singleton pattern is a design pattern that restricts the instantiation of a class to one object, while singleton scope is a scope in which only one instance of a bean is created.

• Singleton pattern is used to ensure that only one instance of a class is created and that it is globally accessible.

• Singleton scope is used in Spring framework to ensure that only one instance of a bean is created and that it is shared across the application.

• Singleton pattern can be implemented using ...read more

MVC life cycle is the sequence of events that occur during the processing of a web request in an MVC application.

• Request comes in through the browser

• Routing determines which controller and action to call

• Controller executes the action and returns a view

• View is rendered and sent back to the browser

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

• Lambda expressions allow for functional programming and simplify code.

• Streams provide a way to process collections of data in a functional way.

• Default methods allow for adding new methods to interfaces without breaking existing code.

• Other new features include the Optional class, Date and Time API, and Nashorn JavaScript engine.

COMP-3 fields are packed decimal fields used in COBOL programming to store numeric data efficiently.

• COMP-3 fields store numeric data in a packed format, using half the storage space of a regular decimal field.

• They are commonly used in COBOL programs for efficient storage and processing of numeric data.

• COMP-3 fields are encoded in a way that allows for easy arithmetic operations without the need for conversion.

• For example, a COMP-3 field with a value of 123 would be stored as ...read more