Exam AZ-203 topic 3 question 7 discussion

Based on options you have: SQLFilter, CorrelationFilrer or No Filter, the solution is: FutureOrders: SQLFilter -> You need to specify a condition for not retreiving results. You cannot achieve this with correlation filter or no filter. HighPriorityOrders -> Correlation filter as you can handle this with AND operations and the fields. InternationOrders -> SQL Filter because you cannot set a "NOT" instruction using correlation. HighQuantityOrders: As above, you need a SQL filter in order to include a sentece with "greater than". All orders: No filter, so you will retreive all the information.

Today I got 900, I had this question, my answer: FutureOrders: SQLFilter HighPriortyOrders: CorrelationFilter InternationalOrders: SQLFilter HighQuantityOrders: SQLFilter AllOrders: No Filter

This is what I think: (No Filter / SQL / SQL / SQL / SQL) --------------------- FutureOrders: [No Filter] (When there are no filters, no message will be delivered) High Priority Orders: [SQL] (High priority AND (Region <> US)) International Orders: [SQL] (Region <> US) High Quantity Orders: [SQL] (Quantity > 100) All Orders: [SQL] (We need to define an action and only SQL filters support that) --------------------- It is a bad practice to use correlation filters in unintended ways. I don't think this exam expects such answers, even though it is technically possible.

Boolean filter is derived from SQL filter, so since boolean filter is not an option, answer is SQL filter. True is 1=1 and false is 1=0. You technically can use correlation filter and set one of the properties to an impossible value but this is bad practice because it is confusing and what if the value became valid/possible

FutureOrders: Would use a Boolean filter as to me it sounds conditional, as BooleanFilter isn’t an option would choose SQLFilter. HighPriortyOrders: CorrelationFilter - since correlation id is used and you should choose correlation filters over SQL-like filters because they're much more efficient in processing and have less impact on throughput InternationalOrders: SQLFilter as its conditional. i.e. Country NOT USA. HighQuantityOrders: Could be SQLFilter or CorrelationFilter since its a user defined property and correlation filters are more efficient to use. Although, couldn’t see any logic on doing a greater than in a correlation filter so a SQL Filter is needed. AllOrders: No Filter - As it affects every single order, so no filters needed.

FutureOrders -> CorrelationFilter (We need to specify a property so it won't match) HighPriorityOrders -> CorrelationFilter(The CorrelationId is a measure of priority) InternationalOrders -> SQLFilter(Use the region) HighQuantityOrders -> CorrelationFilter(It's a user defined property) AllOrders -> No Filter ("If you don't explicitly specify a filter condition for the rule, the applied filter is the true filter that enables all messages to be selected into the subscription") All here: https://docs.microsoft.com/pt-pt/azure/service-bus-messaging/topic-filters

https://vceguide.com/which-filter-types-should-you-implement/

CorrelationFilter (more efficient) SQLFilter (Note high priority oders also contains international order) SQLFilter SQLFilter NoFilter (Default to TrueFilter)

FutureOrders: CorrelationFilter (FalseFilter is not an option here, so set equal to "xxx no match" to ensure won't match) HighPriortyOrders: SQLFilter (high is relative, also need logical AND ShipLocation NOT 'US') InternationalOrders: SQLFilter (ShipLocation NOT 'US') HighQuantityOrders: SQLFilter (numeric comparison to 100 units) AllOrders: No Filter (default to let all orders into subscription) https://docs.microsoft.com/en-us/azure/service-bus-messaging/topic-filters Correlation filters - needs exact equal match (string is case-sensitive), there's no NOT operator, only AND. SQL filters - to test against: exists, is null, NOT/AND/OR, relational, numeric arithmetic, text pattern LIKE). Boolean filters - true or false, defaults to true and don't filter messages

I cannot edit my earlyer answer, so here is This question talks about a queue with several subscriptions. Surely they mean a topic? (https://www.serverless360.com/blog/azure-service-bus-queues-vs-topics) Also, removing a default Rule/Filter would cause no message to be delivered to the subscriber. So in my view, the answers would be: FutureOrders: [No Filter] High Priority Orders: [CorrelationFilter] (Priority == true can be done using correlation) International Orders: [SQLFilter] (Correlation does not have a "does not equal" option) High Quantity Orders: [SQLFilter] (Greater Than can be done using SQL Filter All Orders [ ] (You get a true filter by default. A SQL Filter with 1==1 might also do the job. This one is amiguous) As mentioned before, catching all or nothing can be achieved more explicitly selecting a TrueFilter or FalseFilter.

high priority orders include international orders too. International orders are ones which are from other than US. So should it not be sql filters not correlation filter?

given answer is correct

Answer is NoFilter, CorrelationFilter, SQLFilter, SQLFilter, SQLFilter 1. Bydefault we have sqlfilter(whose condition is 1=1 mean true). if we delete default sqlfilter and add no other filter. it will not receive any messages so answer is NoFilter 2. if more than 1 conditions are there, correlationFilter should be preferred. 3. CorrelationFilter cannot check not match condition. SqlFilter can 4. sql expression so SQLFilter 5. default SQLFilter will work as its value is 1=1 and allows all messages to be recieved.

Given answer is Correct only..

I would say FutureOrders -> CorrelationFilter. You can specify values for Label or CorrelationId properties which do not exist in your messages CorrelationFilter Filter = new CorrelationFilter() { CorrelationId = "value_not_exist" }; https://github.com/Azure/azure-service-bus/tree/master/samples/DotNet/GettingStarted/Microsoft.Azure.ServiceBus/TopicSubscriptionWithRuleOperationsSample

guys this question actually came out on the actual test!

we don't have "true" and "false" filters as option available,why so? What are we supposed to Answer for future orders(false filter) and all order(true filter)