Interview Questions.

Question 1. How Is The Application Jvm Configured?

Answer :

The software JVM is configured with the subsequent alternatives:

com.Solar.Management.Jmxremote
com.Sun.Management.Jmxremote.Port=1088
com.Solar.Control.Jmxremote.Authenticate=false
com.Sun.Control.Jmxremote.Ssl=fake
Question 2. What Are The Advantages Of Setter Dependency Injection?

Answer :

Here are a few blessings of Setter:

Natural for Java Beans
Avoids overly lengthy constructors
Can be inherited
Easier to understand in that houses have names
Constructor args don't have names
Adv Java Interview Questions
Question 3. How To Access Jmx (java Beans) From A Process Running In Docker Container?

Answer :

You have to expose the JMX port to the host or even used Sun unique options even as strolling the Java method.

You are able to telnet to the host ip and the exposed JMX port, which tells that it is available. But I can not discern out a way to use JConsole and connect with the JMX service jogging within the box.

Djava.Rmi.Server.Hostname=$JMX_HOSTNAME
Dcom.Sun.Control.Jmxremote.Port=$JMX_PORT
Dcom.Solar.Management.Jmxremote.Rmi.Port=$JMX_PORT
Question four. What Are The Various Actions Performed When An Application Context Is Created?

Answer :

Here are 5 steps:

Read bean document XML (or technique annotations). Build internal "map" of beans and decide dependency tree.
Post system the definitions - e.G. Resolve $variables
Allocate items - dependency inject constructor args and invoke setter.
Perform any initialisation - three approachs: @PostConstruct, init-approach, InitializingBean
Bean put up-processors - e.G. Wrap with proxy, @Required
Adv Java Tutorial
Question 5. What Is A Named Pointcut And Why To Use One?

Answer :

A point cut expression that has a name so it may be reused.

Resons To use:

Annotation: @Pointcut carried out to a dummy technique - name of the dummy method is the name of the pointcut expression.
XML aop:pointcut identification=".." expression=".."
J2EE Interview Questions
Question 6. List Some Types Of Advice?

Answer :

Types of advice:

Before
AfterReturning
AfterThrowing
After
Around
Question 7. What Is An Advice In Jmx?

Answer :

The code that implements the cross reducing-issue so that it will be inserted at every be part of-point.

J2EE Tutorial Core Java Interview Questions
Question eight. What Is A Join-point?

Answer :

Joint-factor is an expression that defines 0 or greater be a part of-factors.

Question nine. What Is A Cross-reducing Concern?

Answer :

A requirement that cuts across all of the herbal modules of your application.

Examples:

Tracing, security, transactions, business regulations.
Two issues with cross-reducing worries.
Code tangling - technique doing too many unrelated obligations
Code scattering - code duplication leading to preservation headache
JSP Interview Questions
Question 10. What Is Lazy Initialization?

Answer :

Bean isn't allotted till it's far really wanted - dependency injected - or requested thru getBean(). Specify lazy="authentic" (false by means of default). Only useful if bean virtually may in no way be used in maximum runs of the utility.

Core Java Tutorial
Question eleven. What Is A Nested Bean?

Answer :

Scopes the bean in the bean that makes use of it. One much less bean identity inside the set of bean names.

Java-Springs Interview Questions
Question 12. List 2 Examples Of Anonymous Bean?

Answer :

Two examples:

Nested or internal beans
Configuration beans
Adv Java Interview Questions
Question 13. What Are The five Scopes Defined In Spring?

Answer :

5 scopes defined in Spring:

Singleton
Prototype
Session - handiest legitimate in a Web utility context
Request - ditto
Custom
JSP Tutorial
Question 14. How Does A Spring Factory Bean Work?

Answer :

It is created by means of Spring robotically, any setters are referred to as at the factory then its getObject() method is known as to allocate the real bean.

Question 15. What Is The Advantage Of Constructor Dependency Injection?

Answer :

Here are a few advantages:

Constructor
Mandatory
Mutable
Natural Java method.
JMS(Java Message Service) Interview Questions
Question sixteen. How Is Setter Dependency Injection Specified A Configuration File?

Answer :

<constructor-arg… and <belongings…

Java-Springs Tutorial
Question 17. How Is Dependency Injection Performed In The Bean-report Xml?

Answer :

There are nested factors within each bean definition.

Java applet Interview Questions
Question 18. Why Is Dependency Injection Useful?

Answer :

Different collaborators for specific environments may be injected - check, production, take a look at-database, actual database. This allows training to be tested independent of its collaborators (makes it clean to pass in stub or mock items).

J2EE Interview Questions
Question 19. What Is Dependency Injection?

Answer :

A pattern (design) whereby collaborators are passed into an item from the outdoor - the item does now not allocate them for itself.

Java Tutorial
Question 20. How To Run Jmx Java Application In Udeploy Process?

Answer :

Copy WLHOME/wlserver_**/server/lib/wlfullclient.Jar report into agent home/choose/groovy-1.8.8/lib Then the Groovy script (that migrated from my JMX Java software) works.

Java Interview Questions
Question 21. How Will You Check If Jmx Agent Is Working In Tomcat?

Answer :

When Tomcat is walking as a service on Windows, you do now not need setenv.Bat, you want to use tomcat8w.Exe and GUI toll for including options.

Question 22. What If There Is No Jmx Data?

Answer :

No JMX-related output inside the logs. I can connect to the JVM with jconsole the usage of the furnished credentials, browse to the configured mbean, jackhammer the Refresh button and get new values. Splunk, but, receives nothing, and leaves no indication as to why. Searching for "host=redacted" or "supply='jmx://redacted'" yields not anything.

This isn't a complex setup, neither is it a complicated app. Single server test environment, just looking to get JMX information into Splunk immediately as a substitute of having to perform a little nasty seek-time area extraction after indexing facts output from JMXTrans textual content files. It's presently running on JDK 1.7, I tried 1.6 for technological know-how to no avail.

Java eight Tutorial
Question 23. How To Connect To Multiple Jmx Instances Using Splunk For Jmx?

Answer :

Install Splunk 6 in your server which contains about 6 extraordinary JMX times. You want to hook they all up into our Splunk JMX plugin.

It is as smooth as editing the config.Xml report and adding a new jmx server host? Currently this is:

<jmxserver host="[[system name]]" jvmDescription="common_raw" jmxport="53632">

Java 8 Interview Questions
Question 24. What Is Managed Bean Or Mbean?

Answer :

A managed bean - sometimes surely called an MBean - is a type of JavaBean, created with dependency injection. Managed Beans are mainly used within the Java Management Extensions generation. But, with the Java EE 6 specification offers for a greater unique which means of a managed bean.

Core Java Interview Questions
Question 25. What Is Jmx Architecture?

Answer :

JMX is primarily based on a three-level architecture:

The Probe level contains the probes (called MBeans) instrumenting the resources. Also referred to as the Instrumentation stage.
The Agent degree, or MBeanServer, is the center of JMX. It is an middleman between the MBean and the applications.
The Remote Management stage permits far flung programs to get admission to the MBeanServer through Connectors and Adaptors. A connector provides full far flung get right of entry to to the MBeanServer API the usage of diverse conversation frameworks (RMI, IIOP, JMS, WS), at the same time as an adaptor adapts the API to another protocol (SNMP) or to Web-based GUI (HTML/HTTP, WML/HTTP).
Question 26. What Is Jmx?

Answer :

JMX is local to the Java programming language. As a result, it gives herbal, efficient, and lightweight management extensions to Java-based functions. It includes a fixed of specs and development gear for dealing with Java environments and developing modern management answers for applications and offerings.

Java Programmer Interview Questions
Question 27. Explain Jmx Concepts And Architecture?

Answer :

JMX is conceptually easy, yet bears the fruit of years of area experience and studies. In a nutshell, JMX defines a preferred method for programs to expose management functionality 

Instrumentation level 
Agent level 
Management degree
JSP Interview Questions
Question 28. What Is The Use Of Object Factories?

Answer :

Factory methods so as to be used to create gadgets similar to in a static way.

Question 29. Which Is The Best Tool For Monitoring Weblogic Server(wls8)?

Answer :

WLS8 helps JMX but it makes use of weblogic implementation of JMX server. It does no longer supports generalise sun javax API which can be used with any JVM. There are some patches available which can be used with WLS8 in order to enabled JMX based monitoring. Once JMX is permit there are numerous tracking equipment available within the marketplace. One can even cross for custom JMX utilities which can be used for server tracking.