Spring boot packaging jar vs war

Spring Boot can package applications as either JAR or WAR files. Here is a comparison of the two:

JAR files are executable Java files that can be run on any machine with a Java Virtual Machine (JVM). They are typically used for standalone applications, such as command-line tools or desktop applications.

WAR files are web archive files that are used to deploy web applications to a web server. They contain all of the resources that the web application needs, such as HTML, CSS, JavaScript, and Java classes.

Here is a table that summarizes the key differences between JAR and WAR files:

Characteristic	JAR file	WAR file
Type	Executable Java file	Web archive file
Usage	Standalone applications	Web applications
Deployment	Can be run on any machine with a JVM	Must be deployed to a web server
Contents	Java classes, resources, and a manifest file	Java classes, resources, a manifest file, and web.xml file

Which one should you choose?

If you are developing a standalone application, then you should use a JAR file. If you are developing a web application, then you should use a WAR file.

However, there are some cases where you might want to use a JAR file for a web application. For example, you might want to use a JAR file if you are developing a REST API that does not need to be deployed to a web server.

How to package your Spring Boot application as a JAR or WAR file

To package your Spring Boot application as a JAR file, you can use the following command:

mvn clean package

This will create a JAR file in the target directory.

To package your Spring Boot application as a WAR file, you can use the following command:

mvn war:war

This will create a WAR file in the target directory.

Once you have packaged your application as a JAR or WAR file, you can deploy it to your target environment.

What is the best book for C language for bank PO exams?

When preparing for bank PO exams, there are several good books available for learning the C programming language. Here are a few popular choices that can help you understand and practice C programming:

1. "Let Us C" by Yashavant Kanetkar: This book is widely recommended for beginners and provides a comprehensive introduction to the C programming language. It covers topics from basic concepts to advanced programming techniques and includes numerous examples and exercises to reinforce learning.

2. "C Programming Language" by Brian W. Kernighan and Dennis M. Ritchie: Commonly referred to as the "K&R C," this book is considered a classic and is highly regarded in the programming community. It offers a concise and detailed explanation of the C language, focusing on its core features and principles.

3. "Programming in ANSI C" by E. Balagurusamy: This book provides a structured approach to learning C programming, starting from the basics and progressing to more advanced topics. It includes numerous examples, exercises, and programming problems to enhance your understanding.

4. "C in Depth" by Deepali Srivastava and S.K. Srivastava: This book offers a comprehensive coverage of C programming concepts, along with a practical approach to programming. It explains complex topics with clarity and includes numerous examples and exercises for practice.

5. "Understanding and Using C Pointers" by Richard Reese: This book focuses specifically on pointers in the C language, which is an important and often challenging concept. It provides a thorough understanding of pointers and their applications through examples and exercises.

While selecting a book, consider your current programming knowledge and the level of detail you require. It's also beneficial to supplement your study with practical coding exercises, online tutorials, and practice tests to reinforce your understanding of C programming concepts.

Additionally, make sure to review the specific syllabus and exam pattern for the bank PO exams you are preparing for, as the C language may be only a part of the overall syllabus.

How do you learn Python from basic until you become a programmer?

Here are some tips on how to learn Python from basic until you become a programmer:

1. Set realistic goals. Don't expect to become a master programmer overnight. It takes time and effort to learn a new programming language. Start by setting small, achievable goals for yourself. For example, you could start by learning the basics of Python, such as variables, data types, and operators. Once you have mastered the basics, you can move on to more advanced topics, such as functions, classes, and modules.
2. Find a good learning resource. There are many great resources available to help you learn Python. Books, online tutorials, and coding bootcamps can all be helpful. It's important to find a resource that fits your learning style and budget.
3. Practice regularly. The best way to learn Python is to practice regularly. Try to set aside some time each day to work on your Python skills. You can practice by writing your own code, working on coding challenges, or contributing to open source projects.
4. Don't be afraid to ask for help. If you get stuck, don't be afraid to ask for help. There are many online forums and communities where you can get help from other Python developers. You can also hire a Python tutor or take a coding bootcamp.
5. Be patient and persistent. Learning Python takes time and effort. Don't get discouraged if you don't understand something right away. Keep practicing and you will eventually get the hang of it.

Here are some additional tips for becoming a programmer:

• Build projects. One of the best ways to learn Python is to build projects. This will help you to apply what you have learned and to develop your problem-solving skills.
• Contribute to open source projects. This is a great way to get involved in the Python community and to learn from other developers.
• Attend meetups and conferences. This is a great way to meet other Python developers and to learn about new trends in Python programming.
• Read books and articles about Python. This is a great way to stay up-to-date on the latest Python news and developments.
• Get involved in the Python community. There are many ways to get involved in the Python community, such as attending meetups, participating in online forums, and contributing to open source projects. Getting involved in the community is a great way to learn from other developers and to get help when you need it.

Learning Python can be a challenging but rewarding experience. By following these tips, you can increase your chances of success.