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Q2016. Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?
a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory
Ans. Runtime Polymorphism
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Ans. RI or Reference Implementation is a sample implementation provided for the API's / Specs, usually by their developers. This is usually a part of API documentation.
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Q2025. Develop a simple paint like program using applets ?
Ans. Follow the below steps:
1- import the required class and packages.
2- create a class Drawtest for creating an applet.
3- initialize panles and controls int the init() method.
4- Define the destroy() method to destroy the same.
5- create an instance for draw test class and call the init(0 and start() methods in the main method)).
6- Add a new frame to the applet window and resize it to 300x300.
7- Declare a method get applet infor to display the applet information.
8- Declare two constants LINES , POINTS which are going to be the modes.
9- Define the paint method and perfoem the required operations.
10- Display the result according to the mode selected.
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Q2026. Explain Application / Server architecture being used in your project ?
or
Explain your project architecture ?
Ans. We are using cluster of Web servers and Application servers. Load Balancer is used to manage the load between them. Down the layer we have middleware server and then DB server to access database.
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Q2027. How do you monitor the server resources if inadvertently high traffic is reported ?
Ans. We use SAR command for that purpose. We also have GUI system monitoring tool to keep real time check of requests, load and memory usage.
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LikeDiscussCorrect / Improve server monitoring production support servers website traffic system monitoring sar application support
Q2028. Have you ever faced any problem due to caching?
Ans. Yes , sometime we receive issues related to outdated pages being rendered to the user. In those cases we clear the cache and then try to investigate the reason for that. Sometime the issue is due to comparatively high refresh interval. In those cases we reduce the cache refresh interval.
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Ans. It is a Design Pattern that facilitates loose coupling by sending the dependency information ( object references of dependent object ) while building the state of the object. Objects are designed in a manner where they receive instances of the objects from other pieces of code, instead of constructing them internally and hence provide better flexibility.
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Ans. TDD is a development process that involves short iterations: first an automated test case is written. Then, the code is written to pass that test, and finally one refactors the new code to acceptable standards.
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java final java keyword
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Rarely asked as it was introduced with Java 8.
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