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♥ Top 11 slacknesses or mistakes that can come back and bite you as an experienced Java developer

Production issues seek the attention of middle and top level management. Here are a few things that you must pay attention as a software developer or architect to prevent any future embarrassments. You can use this as a check list. #1:  Not externalizing configuration values in .properties or XML files.

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Posted in Java Architect Q&As, QoS
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♦ Monitoring/Profiling Java applications interview Q&A

Q1 How will you go about monitoring your Java application for potential performance or memory issues? A1 1. Visual VM for monitoring Java memory, CPU, threads, etc VisualVM is a visual tool integrating several command-line JDK tools and lightweight profiling capabilities. Designed for both production and development time use, it…...

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Posted in FAQs Java Key Areas, member-paid, Memory Management, Performance, QoS

Auditing database record changes in Oracle

Q. What are some of the considerations in auditing database table data? A. Creating audit tables without any constraints to store record changes.  Audit tables are heavily hit with inserts, hence needs to have fewer indices if at all required. Decide on what combination of triggers are required like  Create,

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Posted in QoS, SQL
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Auditing, data retention and archiving interview Q&A

Q1 What are some of the considerations in auditing database table data? A1 1) Tables are created with auditable columns like created_by, created_date, updated_by, and updated_date, and synch_date or timestamp. You can also have a version column. Thes fields are handy to track changes. The version and timestamp columns are…...

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Posted in member-paid, QoS

How do you monitor the JVM?

Since Java SE 5.0, the JRE provides a mean to manage and monitor the Java Virtual Machine. It comes in two flavors: The JVM has built-in instrumentation that enables you to monitor and manage it using Java Management eXtension (JMX). You can also monitor instrumented applications with JMX. To start…...

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QoS interview Q&A

Q1. What are the system qualities that typically form a basis for QoS requirements? A1. Quality of service (QoS) requirements are technical specifications that specify the system quality of features such as 1) Performance: Response times and throughput with respect to concurrent user load conditions. Conduct performance testing, and monitor…...

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Splunk to analyse Java logs and other machine data

Q1. What is Splunk and where will you use it? A1. Splunk is an enterprise-grade software tool for collecting and analyzing “machine data” like log files, feed files, and other big data in terra bytes. You can upload logs from your websites and let Splunk index them, and produce reports

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Posted in Logging and auditing Tutorial, QoS, Tools

Understanding service and socket timeouts in Java enterprise applications

Q. Why is it important to set proper timeout values in your applications? A. Security and performance. Security reason: it is often necessary to control how long a Web Service client or other valuable clients invoking valuable resources like database connections, transaction management, etc waits for a response after sending a

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Posted in Performance, QoS, Security

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