Apex callout example:

Http http = new Http(); HttpRequest request = new HttpRequest(); request.setEndpoint('https://example.com'); request.setMethod('GET'); HttpResponse response = http.send(request); // If the request is successful, parse the JSON response. if (response.getStatusCode() == 200) { // Deserialize the JSON string into collections of primitive data types. Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody()); // Cast the values in the 'animals' key as a list List<Object> animals = (List<Object>) results.get('animals'); System.debug('Received the following animals:'); for (Object animal: animals) { System.debug(animal); } }

Passing Parameters to REST callout:

Http http = new Http(); HttpRequest request = new HttpRequest(); request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals'); request.setMethod('POST'); request.setHeader('Content-Type', 'application/json;charset=UTF-8'); // Set the body as a JSON object request.setBody('{"name":"mighty moose"}'); HttpResponse response = http.send(request); // Parse the JSON response if (response.getStatusCode() != 201) { System.debug('The status code returned was not expected: ' + response.getStatusCode() + ' ' + response.getStatus()); } else { System.debug(response.getBody()); }

For Test class:

// Create the mock response based on a static resource StaticResourceCalloutMock mock = new StaticResourceCalloutMock();

// Associate the callout with a mock response Test.setMock(HttpCalloutMock.class, mock);

A callout example from trailhead:

@isTest global class AnimalsHttpCalloutMock implements HttpCalloutMock { // Implement this interface method global HTTPResponse respond(HTTPRequest request) { // Create a fake response HttpResponse response = new HttpResponse(); response.setHeader('Content-Type', 'application/json'); response.setBody('{"animals": ["majestic badger", "fluffy bunny", "scary bear", "chicken", "mighty moose"]}'); response.setStatusCode(200); return response; } }

Basic Authentication code:

String username = 'myname';

String password = 'mypwd';  

Blob headerValue = Blob.valueOf(username + ':' + password);

String authorizationHeader = 'BASIC ' +

EncodingUtil.base64Encode(headerValue);

request.setHeader('Authorization', authorizationHeader);

Authentication using Named credentials:

request.setEndpoint('callout:<Nameed credential>/services/data/v32.0');

ref:

https://trailhead.salesforce.com/en/content/learn/modules/apex_integration_services/apex_integration_rest_callouts

 Disable Lightning Locker for an Aura component by setting the Salesforce API version to 39.0 or lower for the component. If a component is set to at least API version 40.0, Lightning Locker is enabled.

The Proxy object ensures that a component only sees DOM elements created by a component in the same namespace.

For security, Lightning Locker restricts the use of global objects by hiding an object or by wrapping it in a secure version of the object. For example, the secure version of window is SecureWindow. Locker intercepts calls to window and uses SecureWindow instead. Some methods and properties have different behavior or aren’t available on the secure objects.

A component can only traverse the DOM and access elements created by a component in the same namespace. This behavior prevents the anti-pattern of reaching into DOM elements owned by components in another namespace.

ref: https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/security_dom.htm#:~:text=A%20component%20can%20only%20traverse,by%20components%20in%20another%20namespace.

1.  we need to contact names on accont text area custom field.
2. apex design patters?
3. are you involved in code reviews?

1.  do kbnow about change data capture?
2. order of event propagation in component event?
3. which interface you use to access the rcord id in lightning component?
4. can we restrict the visibility of a component to only few lighting record pages?
5. can you explain me default phase in application event?
6. by default apex class used in lightning component is with sharing or without sharing?
7. what is record lock error?
8. how do you prevent this?
9. how many callouts you can do in batch apex?
10. what is mixed dml error?
11. how do you prevent this error?
12. best practices when you write the triggers?
13. did you work on flows?
14. to deploy flows do we need test coverage?
15. what is the use of named credentials?
16. does salesforce allow basic authentication?
17. what are custom permissions?
18. does process builder/flows runs in system more or user mode?
19. what are macros and why they are exactly used?
20. do you know about entitlement process?
21. what is view state error? what is the limit?
22. what is the difference between javascript remoting and action function?
23. we have 3 objects a,b,c. b and c are child for a. we have check boxes on a,b and c. when checkboxex updated as true on b and c then only it should update on a.