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a. try block followed by catch b. try block followed by finally c. try block followed by catch block and then finally d. try block without catch or finally block
Ans. try block without catch or finally block
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try block followed by catch block and then finally
try block without catch or finally block
Q752. Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ?
a. Only one object can be created for Singleton class whereas No objects are created for static class. b. Singleton class instance is initiated using new keyword whereas static class instance is created using static method. c. Singleton class can be serialized whereas Static class cannot be. d. Singleton Class can participate in runtime Polymorphism whereas Static class cannot.
Ans. Singleton class instance is initiated using new keyword whereas static class instance is created using static method.
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Q755. Which of the following is not true for final variables ?
a. They cannot be changed after initialization b. They can be initialized within static method c. They can be declared and initialized together at the same place d. They can be initialized within constructor
Ans. They can be initialized within static method
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Q758. Which of the following is false about var args ?
a. Var Args argument should have data type followed by three dots b. Three dots should be consecutive and not separated by even space c. We cannot have space before and after the dots d. If there is a var args in the method, it should be only one and the last one.
Ans. We cannot have space before and after the dots
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Q761. 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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Q766. 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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Q767. 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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Q768. 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. Fail-fast iterators detect illegal concurrent modification during iteration and fail quickly and cleanly rather than risking arbitrary, non deterministic behavior at an undetermined time in future. Example could be of an Iterator failing if it smells ConcurrentModificationException.
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Ans. The goal of a synchronised block is to achieve mutual exclusion i.e at one time, the segment of the code should be executed by single thread only and hence the lock needs to be retrieved before executing the segment and then released.
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Which of the following is not possible ?
