Salesforce-lightning Questions

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Salesforce image resize in LWC

I am new to salesforce development. i want to display an image in lwc in salesforce. i added the image in static resource and add the line in

Salesforce Tests for Org

Should every apex class have its own test class? currently dealing with tests in an org where 80% of apex tests are under
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Refresh table LWC

I've been trying to rerender a table when i update an account record with a lightning-record-form. i tried looking up a solution to this with

Apex Specialist Challenge 1

I cannot resolve this error. closing a maintenance request of type 'routine maintenance' or 'repair' did not create of a new
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Salesforce- JS path shows null

I copied the js patch and pasted it to the console which shows that the item is null. it is the same with the other fields.
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Display attachment in LWC

I'm trying to display a image stored in an attachment. i have tried the following combinations and nothing seem to work: <img
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