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Observability Done Right: Best Practices and Anti-Patterns for Effective System Monitoring

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  WHAT Observability is a concept that refers to the ability to gain insights into the behavior and performance of complex systems. In the context of software engineering, observability involves the collection, analysis, and visualization of data from software applications, infrastructure, and other components of a system. In the animal kingdom, observability plays a critical role in survival, allowing animals to monitor their surroundings, detect threats, and find food. Dolphins use echolocation to observe their surroundings. They emit high-frequency sounds that bounce off objects, allowing them to create a 3D map of their environment. Thanks for reading Knowledge Cafe! Subscribe for free to receive new posts and support my work. Subscribed WHY In today's era, architectures are becoming increasingly large, complex, and fast-paced due to the faster development and deployment of software by distributed teams with the help of DevOps, continuous delivery, and agile development methodo...
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JDBC Interview Question

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Java Database Connectivity API contains commonly asked Java interview questions. A good understanding of JDBC API is required to understand and leverage many powerful features of Java technology. Here are few important practical questions and answers which can be asked in a Core Java JDBC interview. [expand title="What are available drivers in JDBC?"] JDBC technology drivers fit into one of four categories: A  JDBC-ODBC bridge  provides JDBC API access via one or more ODBC drivers. Note that some ODBC native code and in many cases native database client code must be loaded on each client machine that uses this type of driver. Hence, this kind of driver is generally most appropriate when automatic installation and downloading of a Java technology application is not important. For information on the JDBC-ODBC bridge driver provided by Sun, see  JDBC-ODBC Bridge Driver . A  native-API partly Java technology-enabled driver  converts JDBC calls into calls on the client API for...
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Java Collection Interview Questions-2

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Java Collections Framework are the fundamental aspect of java programming language. It’s one of the important topic for java interview questions. Here I am listing some important questions and answers for java collections framework. [expand title="What is an Iterator"] Some of the collection classes provide traversal of their contents via a java.util.Iterator interface. This interface allows you to walk through a collection of objects, operating on each object in turn. Remember when using Iterators that they contain a snapshot of the collection at the time the Iterator was obtained; generally it is not advisable to modify the collection itself while traversing an Iterator.[/expand]   [expand title="Difference between HashMap and HashTable? Compare Hashtable vs HashMap?"] Both Hashtable & HashMap provide key-value access to data. The Hashtable is one of the original collection classes in Java (also called as legacy classes). HashMap is part of the new Collectio...
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Java Collection Interview Questions-1

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Java Collections Framework are the fundamental aspect of java programming language. It’s one of the important topic for java interview questions. Here I am listing some important questions and answers for java collections framework. [expand title="What is Java Collections API?"] Java Collections framework API is a unified architecture for representing and manipulating collections. The API contains Interfaces, Implementations & Algorithm to help java programmer in everyday programming. In nutshell, this API does 6 things at high level Reduces programming efforts. - Increases program speed and quality. Allows interoperability among unrelated APIs. Reduces effort to learn and to use new APIs. Reduces effort to design new APIs. Encourages & Fosters software reuse. To be specific, There are six collection java interfaces. The most basic interface is Collection. Three interfaces extend Collection: Set, List, and SortedSet. The other two collection interfaces, Map and Sorted...
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Spring Interview Questions

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Spring interview questions  is in rise on J2EE and core Java interviews,  As Spring is the best framework available for Java application development and now  Spring IOC container  and Spring MVC framework are used as de-facto framework for all new Java development. We will be adding the more number of questions from readers request. If you are looking for any specific questions and doubts, please post your queries in the comments section of this article. We will update the questions and send you the remainder about the update.  Also don’t forget to leave the feedback about the questions in this article and provide suggestions. [expand title="(1)What is Spring Framework?"] Spring  is a lightweight inversion of control and aspect-oriented container framework. Spring Framework’s contribution towards java community is immense and spring community is the largest and most innovative community by size. They have numerous projects under their portfolio and have their own spring dmSer...
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