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Q32. Explain Application / Server architecture being used in your project ?
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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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Ans. 1. Switching Overheads - Even though multi threading aims at improving performance by reducing the wait time and hence improving overall throughput, there is a cost of switching resources between threads and sometime this cost can surpass the benefits if there isnt much wait for IO or external communication.
2. Debugging is hard with multi threaded code.
3. Deadlock - Execution of multi threaded code many a times lead to deadlock due to shared resources.
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Ans. Controller Command is the command that gets called upon a request, just like We have actions in struts and controller in Spring. Task is a step in this bigger process. Task command are the commands that perform specific task for a controller command, like service classes in other frameworks. In order to complete the request, a controller command may invoke multiple task commands.
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Ans. The prototype pattern is a creational design pattern. It is used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects. Prototype is used when we need duplicate copies of objects.
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Ans. Item is a sale-able merchandise where as Product is a group of sale-able merchandise which share certain attributes. For example - Cell phone is a product whereas Samsung Galaxy S2 - White is an item.
Quantity is always attached to SKU ( Stock keeping unit ) or items. Product quantity has no relevance in terms of identify the current stock or reorder condition.
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Ans. Promotions are created either using Management Center or Accelerator. PX_PROMOTION table is used to store Promotions. Complete Promotion is stored as an XML string within XMLPARAM column. Other tables which are used to store promotion related information are -
CATENTCALCD
CALCODE
CLCDPROMO
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Ans. Purchase condition is the condition that must be fulfilled before a promotion is applied and Reward is the benefit that is passed to customer.
For Example - If promotion is "Buy 2 Quantity of X, Get Y Free" , Purchase condition is inclusion of 2 qty of X in Cart. Reward in this case would be 1 qty of Y.
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Ans. a. Create necessary lzx files( template , object definition and properties ), make config entries and then Build open Laszlo project ( for LOBTools ) so that new promotion type should be displayed in management center.
b. Create a new promotion type xsl ( promotion type template ) and then map it to the promotion type.
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Ans. Step 1 - Create a new policy definition by adding record in tables POLICY, POLICYDESC.
Step 3 - Associate commands to the new policy by adding records in POLICYCMD.
Step 2 - Associate the new policy with its terms and conditions by adding a record in relationship table POLICYTC.
Step 4 - Add reference to the policy in the repective contract xml file.
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Catalog business policies define the scope and characteristics of the catalog of products for sale in a store including prices and the categorization of products in a store's catalog.
Payment business policies
Invoicing, payment, and refund business policies define how a store accepts payments, pays refunds, and the format of a store's invoices.
Returns business policies
Returns business policies define if refunds are accepted, the time period they are accepted for, and any re-stocking fees applied to returns.
Shipping business policies
Shipping business policies define the shipping providers a store can use and the charges associated with each type.
Referral interface business policies
Referral interface business policies define the relationship between a proxy store and a remote store.
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Ans. There are three elements i.e Users ( Who want access ) , Actions ( What kind of Access ) and Resources ( Whose Access ). The relationship between resource and user is store in ACRELATION table and ACRESREL associate a resource and relationship.
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