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First, you have to check the settings on your Visualforce Page by navigating to Setup -> Develop -> Pages. Once there, you need to make sure that the Available for Salesforce mobile apps setting is checked.

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Follow these steps to add lightning components to a Visualforce page:
1. Add the Lightning Components for Visualforce JavaScript library to your Visualforce page using the <apex:includeLightning/> component.
2. Create and reference a Lightning app that declares your component dependencies.
3. Write a JavaScript function that creates the component on the page using $Lightning.createComponent().

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Time fields use the TIMEVALUE() function similarly to DATEVALUE(). And to get the current time, use the TIMENOW() function.

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You will need to cast from a generic sobject to a concrete sobject like an opportunity or case or account then do the insert. I've not had to do this before but I have read that you can look at the first 3 letters of objects id or use describe the information to determine what concrete type is being held by the generic. the syntax would be just like you intuited (account)oType.newSobject()

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OpenID Connect is an interoperable authentication protocol based on the OAuth 2.0 family of specifications. It uses straightforward REST/JSON message flows with a design goal of “making simple things simple and complicated things possible”. It’s uniquely easy for developers to integrate, compared to any preceding Identity protocol. It uses any third-party web app that implements the server-side of the OpenID Connect protocol as an authentication provider, such as Amazon, Google, and PayPal.

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Connected app is a framework that enables an external application to integrate with Salesforce using APIs and standard protocols, such as SAML, OAuth, and OpenID Connect. Connected apps use these protocols to authenticate, authorize, and provide single sign-on (SSO) for external apps. The external apps that are integrated with Salesforce can run on the customer success platform, other platforms, devices, or SaaS subscriptions.

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Connected app developer: It is a Salesforce developer or ISV who builds API integrations or external apps that can access Salesforce data as a connected app. As a developer, you can build a connected app for your org, but other Salesforce orgs can install and use it too.
connected app admin: you install, uninstall, and when necessary block connected apps from the Salesforce org. You also configure permissions and policies for the apps, explicitly defining who can use the connected apps and where they can access the apps from. These permissions and policies, which include profiles, permission sets, IP range restrictions, and two-factor authentication, provide extra security for your org.

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We can use Async SOQL when You are querying against millions of records and you want to ensure that your query completes.

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Email alerts are emails generated by an automated process and sent to designated recipients. These actions consist of the standard text and list of recipients for an email. You can associate email alerts with processes, flows, workflow rules, approval processes, or entitlement processes.

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Big object: It stores and manages massive amounts of data on the Salesforce platform. You can archive data from other objects or bring massive datasets from outside systems into a big object to get a full view of your customers. Clients and external systems use a standard set of APIs to access big object data. It provides consistent performance, whether you have 1 million records, 100 million, or even 1 billion. This scale gives a big object its power and defines its features.

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To Create Inbound Email Service: go to Setup → Build → Develop → Email Services.
Before creating Email Services, Create Apex classes that implement the Messaging.InboundEmailhandler interface. Using the handleInboundEmail method in that class, you can access an InboundEmail object to retrieve the contents, headers, and attachments of inbound email messages, as well as perform many functions.
After Creating Apex Classes based on the requirement, Create an Email Service:
1. Click on New Email Service, Enter Email Service name
2. Choose the appropriate class which you created earlier. Choose the type of attachments you want to accept.
3. Click on the Advanced Email Security settings checkbox.
4. Choose whether to convert text attachments to binary attachments and active checkbox.
5. Configure Failure response settings and click on save.

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You need to create the formula as a field on the object then create a workflow rule (or process builder, both would work). Criteria would be: NOT(ISBLANK(start_date__c))
Then add a time trigger that would say "0 DAYS before Formula date". Now add an email alert (you'll need a template) and send it.

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Try this:
String type='Account';
Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();Schema.SObjectType leadSchema = schemaMap.get(type);Map<String, Schema.SObjectField> fieldMap = leadSchema.getDescribe().fields.getMap();for (String fieldName: fieldMap.keySet()) {
System.debug('##Field API Name='+fieldName);// list of all field API name
fieldMap.get(fieldName).getDescribe().getLabel();//It provides to get the object fields label.}

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Every ID in the App is either 15 characters or 18 characters (API). The first 3-digits of the ID are always the Entity ID which can be used to determine the type of the entity. Example: Contact ID (003D0000001aH2A) It have Object ID Prefix: 003

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DeserializeUntyped is used to deserializes the specified JSON string into collections of primitive data types.

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Apex provides classes that enable you to work with XML content using the DOM and DOM represents an XML document as a hierarchy of nodes. Some nodes may be branch nodes and have child nodes, while others are leaf nodes with no children. You can parse nested XML content that’s up to 50 nodes deep. DOM classes help you parse or generate XML content.

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SAML transactions use Extensible Markup Language (XML) for standardized communications between the identity provider and service providers. It is the link between the authentication of a user’s identity and the authorization to use a service.

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The Access token is to be passed in the header of all API requests for data. This token has an expiration date and will always expire. By default, the Connected Apps have an access token with an expiry of 15 minutes

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No, We cannot call future methods directly from batch apex but we can call a web service from batch class and that web service can call the @future method. Also, we can call the future method from finish method in the batch class.

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You're limited to 50 future calls per Apex invocation, and there's an additional limit on the number of calls in a 24-hour period.

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You cannot call another future method from a future method. As per Salesforce documentation, You cannot call a method annotated with future from a method that also has the future annotation. Nor can you call a trigger from an annotated method that calls another annotated method.

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<div>Follow these steps to create a big object:</div>1. Go to SetUp -> Enter Big Objects in the Quick Find Box -> Select Big Objects.
2. Click on New.
3. Add details about the big object.
4. Add or edit custom fields. Custom fields store the data for your big object records.
5. Add an index. The index defines the composite primary key for a big object and is used for querying and filtering the big object data.
6. Click on Save.

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The query on Standard and custom objects is different than the query on Big objects. When you are using SOQL queries you need to query in all fields starting from the first field and do not skip any field at the end in the query because if you will skip any field it will return wrong data.
For example: SELECT LastName__c, FirstName__c, Phone__c FROM Phone_book__b WHERE LastName__c=’001R01110302D3′ AND FirstName__c=’PC’ AND Phone__c =’243566′

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We can find a salesforce session-id by going to the contact page inside of Salesforce and looking at the URL at the top of the page. Everything to the right of “salesforce.com/” is your ID number. It will be 15 digits.
In Apex you can find session id by using this: String MySessionID = UserInfo.getSessionID();

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Batch apex is the option that will work. We can process up to 5 Million records in one batch.