Logic and Process Automation: 33%

Question 1

What are the 7 trigger events?

Answer 1

before insert
before update
before delete
after insert
after update
after delete
after undelete

Question 2

Why would you Bulkifying DML Calls?

Answer 2

Making DML calls on lists of sObjects instead of each individual sObject makes it less likely to reach the DML statements limit (150 DML statements per transaction)

Question 3

Give an example on how to bulkify a for loop

Answer 3

Instead of:
for(Line_Item\_\_c li : liList) {
    if (li.Units_Sold\_\_c > 10) {
        li.Description\_\_c = 'New description';
    }
    // Not a good practice since governor limits might be hit.
    update li;
}

Write it as : 
List updatedList = new List();
for(Line_Item\_\_c li : liList) {
    if (li.Units_Sold\_\_c > 10) {
        li.Description\_\_c = 'New description';
        updatedList.add(li);
    }
}

// Once DML call for the entire list of line items
update updatedList;

Question 4

What is the only method of the Schedulable interface?

Answer 4

The only method that the Schedulable interface contains is the execute method
global void executable(SchedulableContext sc) {}

Question 5

What are the arguments of the System.schedule method?

Answer 5

The System.Schedule method takes 3 arguments: a name for the job, an expression used to represent the time and date the job is scheduled to run, and the name of the class.

Question 6

How many classes can you schedule at one time (through System.Schedule)

Answer 6

You can only have 100 classes scheduled at one time.

Question 7

What interface do you need to implement when writing a batch Apex class?

Answer 7

Your class must implement the Database.Batchable interface. Your class declaration must include the implements keyword followed by Database.Batchable

For example:
global class CleanUpRecords implements Database.Batchable { ...

Question 8

What are the three methods you need to implement when writing a batch Apex class?

Answer 8

1. start
2. execute
3. finish

start method:
global (Database.QueryLocator | Iterable) start(Database.BatchableContext bc) {}

execute method:
global void execute(Database.BatchableContext BC, list<p>){}

finish method:
global void finish(Database.BatchableContext BC){}</p>

Question 9

How do you invoke a Batch Class?

Answer 9

Instantiate it first and then call Database.executeBatch with the instance of your batch lass

For example:
BatchClass myBatchObject = new BatchClass();
Database.executeBatch(myBatchObject);

Question 10

What are 3 use cases on when to use Apex Triggers

Answer 10

1- Data-Driven Sharing (Apex triggers automate record sharing based on dynamic data-driven record criteria

2- Complex Validation Rule (ex: execute validation logic upon record deletion, or utilize complex database queries to verify data quality)

3- Callout to an External Web Service (Reuse existing interfaces in an enterprise)

Question 11

If the parent object is called Position__c and the child object is called Interviewer__c, please provide the syntax for the parent-to-child relationship

Answer 11

Interviewers__r

Question 12

If the parent object is called Position__c and the child object is called Interviewer__c, please provide the syntax for the child-to-parent relationship

Answer 12

Postion__r

Question 13

What are the two member variables on the child object to refer to the parent. For example, if the Parent Object called Position and the child object is called Job Application

Answer 13

1 - Using the foreign key
ex:
Job_Application__c ja1 = new Job_Application__c();
ja1.position__c = ‘a05S0000000WZeYIAW’

2 - Using the object reference
ex:
Job_Application__c ja1 = new Job_Application__c();
ja1.position__r = new Position__c();

Question 14

What are the two ways to insert SOQL statements into Apex

Answer 14

1- Square-bracketed expressions
ex: [ SELECT Name from Position__c]

2- Database.query method:
ex Database.query(‘SELECT ‘ + MyFieldsString + ‘ FROM ACCOUNT’)

Question 15

What are the three data types that a SOQL statement can return

Answer 15

1. List of sObjects
2. Single sObject
3. Integer

Question 16

Which SOQL Function will you use to return the average value of a numeric field.

Answer 16

AVG()

Question 17

Which SOQL Function will you use to return the number of rows matching the query criteria.

Answer 17

COUNT()

Question 18

Which SOQL Function will you use to return the number of distinct non-null field values?

Answer 18

COUNT_DISTINCT()

Question 19

Which SOQL Function will you use to return the minimum value of a field

Answer 19

MIN()

Question 20

Which SOQL Function will you use to return the maximum value of a field

Answer 20

MAX()

Question 21

Which SOQL Function will you use to return the total sum of a numeric field

Answer 21

SUM()

Question 22

Which SOQL Function will you use to return a number representing the calendar month of a date field

Answer 22

CALENDAR_MONTH()

Question 23

Which SOQL Function will you use to return a number representing the day in the month of a date field

Answer 23

DAY_IN_MONTH()

Question 24

Which SOQL Function will you use to return a number representing the fiscal year of a date field

Answer 24

FISCAL_YEAR()

Question 25

Which SOQL Function will you use to return a number representing the week in the year for a date field

Answer 25

WEEK_IN_YEAR()

Question 26

Which exception would be generated if you try an access a field that was not included in the select clause of a SOQL?

Answer 26

System.SObjectException

Question 27

What keyword should you add to the SOQL query to return both active and deleted records

Answer 27

ALL ROWS

Question 28

What is the maximum of child-to-parent relationships you can have within a SOQL query

Answer 28

Maximum of 5

Question 29

What is the maximum of parent-to-child relatioships you can have within a SOQL query

Answer 29

Only one parent-to-child relationship

Question 30

What is the main difference between SOQL and SOSL?

Answer 30

SOQL is used to construct simple but powerful query strings in APex. SOSL is used to search for specific data in your org. Unlike SOQL, SOSL can query multiple objects at once and is used to perform text searches.

Question 31

What is the result of a SOSL query?

Answer 31

Return a list of lists of sObjects

Question 32

Which fields are excluded when a SOSL query is run?

Answer 32

Dates, IDs and Numbers

Question 33

Which clause is used in a SOSL query to specify the search string

Answer 33

The FIND clause | ex: List> results = [FIND 'Acme*' ...];

Question 34

Which clause is used to limit the type of fields to search in a SOSL query

Answer 34

The IN Clause specifies the following search scope: - ALL FIELDS - EMAIL FIELDS - NAME FIELDS - PHONE FIELDS - SIDEBAR FIELDS ex: List> results = [FIND 'Acme*' IN NAME FIELDS ...];

Question 35

Which clause is used to limit the results to a specified object type in a SOSL query

Answer 35

The RETURNING Clause limits results per sObject type | ex: List> results = [FIND 'Acme*' IN NAME FIELDS RETURNING Account, Contact];

Question 36

Which clause in a SOSL query is used to filter search results on specific field values

Answer 36

the WHERE clause ex: List> results = [FIND 'Acme*' IN NAME FIELDS RETURNING Account(Name, BillingCountry WHERE CreatedDate= THIS_FISCAL_QUARTER)];

Question 37

What is wrong with the following piece of code: FOR (Position__c p : [SELECT id FROM Position__c]) { //code block Database.update(p); }

Answer 37

In this example, the DML statement is executed inside the loop, which results in one DML call for each sObject record. This pattern will break if the number of DML statements exceed the limit of 150.

Question 38

Which of the following statements are true about a SOQL SELECT statement? (Choose all that apply) A) It is similiar to the SELECT statement in SQL B) It is used to perform searches across multiple sObjects C) It helps retrieve records from an object in the Force.com database D) It returns a list of lists of sObjects

Answer 38

A) and C). The SOQL SELECT statement is similar to the SELECT statement in SQL and includes a list of fields to retrieve records from an object in the Force.com database

Question 39

``` What are the two ways to insert SOQL into Apex? A) Database.search() method B) Square-bracketed expressions C) search() method D) Database.query() method ```

Answer 39

B) and D). You can insert SOQL into Apex either by enclosing them in square-bracketed expressions or by using the Database.query method

Question 40

``` Identify the clause that is used in a SOSL statement to limit results to specified object types: A) IN B) RETURNING C) WHERE D) ORDER BY ```

Answer 40

B) RETURNING clause is used to limit results to specified object types

Question 41

In the execution order of triggers, what are the 3 steps that happen before the "before" triggers are executed

Answer 41

1 - The original record is loaded from the database or initialized for insert 2 - The new record field values are loaded and old values are overwritten 3 - System validation rules are executed and required fields are verified Before triggers are executed

Question 42

In the execution order of triggers, what are the 3 steps after the "before" triggers were executed, and before the "after" triggers are executed?

Answer 42

Before triggers were executed 1 - Most system validation steps are run again and validation rules are checked 2 - Executes duplicate rules 3 - The record is saved to the database but not committed After triggers are executed

Question 43

What are the two steps after the "after" triggers are executed for the first time?

Answer 43

After triggers were executed 1 - Assignment rules, auto-response rules, and workflow rules are executed 2 - Records are updated again if workflow fields are updated Before and After triggers are executed again if fields are updated based on workflow rules Standard validations are checked. BUT Custom validation rules, duplicate rules and escalation rules are NOT run again

Question 44

What are the 8 final steps after the "before" and "after" triggers were executed?

Answer 44

1 - Executes processes (if there are worfklow flow triggers the flows are executed) 2 - Escalation rules are executed 3 - Executes entitlement rules 4 - Rollup summary formula or cross-object formula fields are updated in the parent records and affected records are saved 5 - Repeat the same process for affected grand parent records 6 - Criteria Based Sharing evaluation is executed 7 - All DML operations are committed to the database 8 - Post-commit logic is executed

Question 45

Which trigger context variable returns the total number of new and old sObjects?

Answer 45

Trigger.size

Question 46

What does Trigger.new mean?

Answer 46

Trigger context variable that returns a list of new versions of the sObjects. Can be used in insert and update triggers. Contains references to sObjects

Question 47

When can Trigger.new values be modified?

Answer 47

Only when used with before triggers

Question 48

What does Trigger.newMap mean

Answer 48

Trigger context variable that returns a map of IDs for the new versions of the sObjects.

Question 49

What does Trigger.old mean?

Answer 49

Contains the references to the current version of sObjects. It is used only in update and delete triggers And it is READ ONLY In the context of an insert operation it is NULL

Question 50

What does Trigger.oldMap mean?

Answer 50

Trigger.oldMap is similar to Trigger.old, but returns a map relating the record IDs to sOjbects

Question 51

How/Why is the addError() method used?

Answer 51

The addError() method : - helps prevent the completion of DML operations for the marked records - Can be applied to the sObject or to a specific field - Can cause error messages to appear in the Salesforce UI For instance, if a record save is issued and the record contains bad data, the addError method can prevent the record from being saved and then issue a warning about the bad data to the user.

Question 52

In which context does the triggers run by default?

Answer 52

Run as system by default

Question 53

Which bulk operations do not execute triggers?

Answer 53

``` 1 - Cascade deletion 2 - Mass campaign 3 - Status updates 4 - Renaming Picklists 5 - Managing price books ```

Question 54

Can a trigger contain the static keyword?

Answer 54

No, Trigger code cannot contain the static keyword, and can contain keywords applicable to an inner class.

Question 55

What is a possible impact of a cascading trigger (trigger that causes other triggers to fire off)

Answer 55

Cascading triggers are considered to be part of the same execution context for governor limits

Question 56

What triggers will an upsert event cause?

Answer 56

Both insert and update triggers

Question 57

What triggers will a merge event cause?

Answer 57

- Delete triggers for the unsuccessful records | - Update triggers for the successful records

Question 58

What are the only records that an after undelete trigger will work on?

Answer 58

The after undelete trigger works only with recovered records. In addition, undelete events run only on top -level objects.

Question 59

What is Apex Sharing?

Answer 59

- Apex sharing is a way to create custom sharing reasons and control access levels for those reasons using custom Apex Scripts - Custom Apex sharing reasons can be created only on custom objects from a custom object configuration menu

Question 60

What is the maximum number of records that a trigger can execute at a time

Answer 60

Triggers can execute a maximum of 200 records at a time. If the number of records exceeds 200, triggers are executed in chunks of 200

Question 61

Identify the best solution (Declarative or Programmatic) to accomplish the following task: Prevent Duplicate candidate records from being captured in the database. The combination of a candidate's last name and email address is enough to ensure uniqueness within the system.

Answer 61

Answer: Declarative! Declarative solution: - Create a unique field on the candidate object - Create a workflow rule on the Candidate object - Add a workflow action to update the new field - Activate the workflow rule Programmatic Method - Create insert or update trigger on Candidate - Trigger receives new candidate batch and passes it to the class - Class checks the Candidate object for uniqueness

Question 62

Identify the best solution (Declarative or Programmatic) to accomplish the following task: Ensure that each position object has, at most, one related salary record and that records that violate this rule are prevented from being saved

Answer 62

Answer: Declarative! Declarative solution: - Create a unique text field on the Salary object - Create a workflow rule on Salary - Add a workflow action - Activate the workflow rule Programmatic Method: - Create an insert, update or undelete trigger on Salary - Trigger receives new salary batch to check for duplicate records

Question 63

Identify the best solution (Declarative or Programmatic) to accomplish the following task: When a job has been offered to a candidate, the Job application record should be updated accordingly. SO, when a new offer record is created, the Job application should be set with Stage=Offer Extended and Status= Hold.

Answer 63

Answer: Programmatic! Declarative solution: - Change the fundamental relationship between Job Application and Offer - Add a roll-up summary field - Create a workflow rule on Job Application - Add two field update actions Programmatic Method: - Create a trigger on Offer - Trigger update the value of Stage and Status field to Offer Extended and Hold respectively

Question 64

True or False: The before trigger can be used to access system-updated field values and affect changes in other records

Answer 64

False: The after trigger is used to access system-updated field values and affect changes in other records.

Question 65

``` How many times will a trigger execute for 1,001 records A) 5 B) 6 C) 10 D) 11 ```

Answer 65

B) - 6 times for 1001 records

Question 66

What is the limit of messages that all email services combined can be processed daily?

Answer 66

Total number of messages that all email service put together can process in a day is calculated by multiplying the number of user licenses by 1000. Messages that exceed this limit are bounced, discarded, or queued, based on how the failure response settings for each email service are configured

Question 67

What are the steps to setup an Inbound Email Service

Answer 67

``` 1- Create the email handler class shell 2- Configure an email service 3- Complete the email handler class 4- Configure failure response settings 5- Generate service email addresses 6- Activate service email addresses 7- Test inbound email ```

Question 68

Which Interface should be implemented when creating the Apex email handler class?

Answer 68

Messaging.InboundEmailHandler

Question 69

What information do Email Logs contain and how long is it stored?

Answer 69

This information is archived for a period for 30 days. Email logs contain: - the email addresses of senders and recipients - the date and time an email is sent, the delivery status of each email - any error code associated with each email

Question 70

Which method is used to send emails via Apex

Answer 70

The Messaging.sendEmail method is used to send emails

Question 71

How many sendEmail methods are allowed in each context?

Answer 71

No more than 10 sendEmail methods are allowed in each context.

Question 72

What error is received when the daily mass mail limit has been reached?

Answer 72

MASS_MAIL_LIMIT_EXCEEDED

Question 73

What is the daily email limit for overall organization workflow?

Answer 73

2 million

Question 74

How many emails can be sent to external email addresses per day?

Answer 74

No more than 1000 emails can be sent to external email addresses per day

Question 75

What is the limit to the number of internal emails received?

Answer 75

There is no limit to the number of internal emails received in a day.

Question 76

Emails from Salesforce can be configured to automatically comply with which 2 email security frameworks

Answer 76

SPF | SenderID

Question 77

What is the SPF security framework?

Answer 77

SPF modifies the From address of an inbound email to a salesforce.com email address to verify the legitimacy of an email

Question 78

What is SenderID compliance?

Answer 78

SenderID compliance is to automatically populate the Sender field of every email sent from Salesforce with no-reply@salesforce.com The SenderID compliance enables the receiving mail servers to verify the sender of an email

Question 79

Identify the true statements about email messages A) You can restrict the domains from which an email service can receive emails B) Inbound email service allows binary attachments only C) Emails sent using Apex to internal Salesforce users count against the org email limits for the day D) You can use email templates to send mass emails to users E) Multiple email addresses can be generated per service

Answer 79

A and E You can restrict the domains from which an email service can receive emails Multiple email addresses can be generated per service.

Question 80

What does the Schema Describe component do?

Answer 80

- A way to programatically learn about the metadata of the data model with Apex - Calls provide the ability to programatically discover information about the current org schema

Question 81

What is Dynamic SOQL?

Answer 81

- Refers to creation of a SOQL string at runtime within Apex - Allows you to query data without hardcoding names of fields and objects in the SOQL statement - Makes an application more flexible by allowing SOQL creation at runtime

Question 82

What is Dynamic SOSL

Answer 82

- Refers to creation of a SOSL string at runtime - Allows you to search for data without hardcoding names of fields and objects in the SOSL statement - Makes an application more flexible by allowing SOSL creation at runtime

Question 83

What is Dynamic DML

Answer 83

Provides the ability to perform DML operations on sObjects dynamically

Question 84

What is a token?

Answer 84

A token is a type of data structure used for SObject and field describe information. Specifically it is a lightweight reference to an sObject or a field. It can be compared using the equality operation (==)

Question 85

What describe result object is returned when calling the getDescribe() call from an sObject token?

Answer 85

Schema.DescribeSObjectResult

Question 86

What describe result object is returned when calling the getDescribe() call from a field token?

Answer 86

Schema.DescribeFieldResult

Question 87

What describe result object is returned when calling the getDescribe() call from an instance of Schema.DescribeSOjbectResult object

Answer 87

Schema.ChildRelationship | Schema.RecordTypeInfo

Question 88

What describe result object is returned when calling the getDescribe() call from an instance of a Schema.DescribeFieldResult object

Answer 88

Schema.PickListEntry

Question 89

Set the following schemaMap property equal to the Map of SObjectTypes in the current org private Map schemaMap(); schemaMap = _______________;

Answer 89

schemaMap=Schema.getGlobalDescribe();

Question 90

Which of the following statements are true about components of dynamic Apex? A) Schema describe is a way to programmatically learn about the metadata of your data model within Apex B) Dynamic SOQL refers to the creation of a SOQL string before runtime within an Apex script C) In dynamic SOQL, you can use the escapeSingleQuotes method to prevent the SOQL injection D) You can use dynamic SOSL to create a tree structure of all the objects and fields in your schema browser

Answer 90

A) and C)

Question 91

Sequence the steps to execute a code that generates schema describe: A) Generate a list or map of tokens for the sObjects in your organization B) Generate a map of field tokens for the sObject C) Generate the describe result for the sObject D) Determine the sObject you need to access E) Generate the describe result for the field the script needs to access

Answer 91

1. Generate a list or map of tokesn for the sObjects in your organization (A) 2. Determine the sObject you need to access (D) 3. Generate the describe result for the sObject (C) 4. Generate a map of field tokens for the sObject (B) 5. Generate the describe result for the field the script needs to access (E)

Question 92

What is a key benefit of asynchronous processing? A) Higher governor and execution limits B) Unlimited number of external callouts C) Override organization-wide sharing defaults D) Enabling turbo mode for transactional processing

Answer 92

A) Higher governor and execution limits

Question 93

Batch Apex is typically the best type of asynchronous processing when you want to: A) Make a callout to a web service when a user updates a record B) Schedule a task to run on a weekly basis C) Update all records in your org D) Send a rickroll email to a contact?

Answer 93

C) Update all records in your org

Question 94

``` What type of jobs do not show up in the Apex Flex Queue? A) Future Method Jobs B) Batch Apex Jobs C) Queueable Apex Jobs D) Scheduled Apex Jobs ```

Answer 94

A) Future Method Jobs are not showing up currently in the Flex Queue

Question 95

Which statement is true regarding the Flex Queue? A) You can submit up to 200 batch jobs for execution B) Jobs are processed first-in first-out C) Jobs can only be scheduled during Taco Tuesdays D) Jobs are executed depending upon user license

Answer 95

B) Jobs are processed first-in first-out Please note that Flex enables you to submit up to 100 batch jobs for execution

Question 96

Which tool would you use for the following use case? Launch a troubleshooting wizard from a button, at the end of which a knowledge article is created if it’d be helpful to other users. A) Process Builder B) Visual Workflow C) Workflow D) Approvals

Answer 96

B) Visual Workflow

Question 97

Which tool would you use for the following use case? When an opportunity has a discount of more than 40%, notify the CEO via email and request sign-off. Provide a way for the CEO to leave comments. A) Process Builder B) Visual Workflow C) Workflow D) Approvals

Answer 97

D) Approvals

Question 98

Which tool would you use for the following use case? When an opportunity closes, automatically close all activities related to that opportunity and create a renewal opportunity. A) Process Builder B) Visual Workflow C) Workflow D) Approvals

Answer 98

A) Process Builder

Question 99

Which tool would you use for the following use case? As an account’s expiration approaches, send recurring email notifications to the owner (2 weeks before, 1 week before, 3 days before, and 1 day before). A) Process Builder B) Visual Workflow C) Workflow D) Approvals

Answer 99

C) Workflow

Question 100

For Asynchronous Apex, give a high overview of Future Methods (and a common scenario)

Answer 100

Overview: Run in their own thread, and do not start until resources are available. Common Scenario: Web service callout.

Question 101

For Asynchronous Apex, give a high overview of Batch Apex (and a common scenario)

Answer 101

Overview: Run large jobs that would exceed normal processing limits. Common Scenario:Data cleansing or archiving of records.

Question 102

For Asynchronous Apex, give a high overview of Queueable Apex (and a common scenario)

Answer 102

Overview: Similar to future methods, but provide additional job chaining and allow more complex data types to be used. Common Scenario: Performing sequential processing operations with external Web services.

Question 103

For Asynchronous Apex, give a high overview of Scheduled Apex (and a common scenario)

Answer 103

Overview: Schedule Apex to run at a specified time. Common Scenario: Daily or weekly tasks

Question 104

When can a DmlException occur?

Answer 104

When there is any problem with a DML statement, such as an insert statement missing a required field on a record

Question 105

What is a ListException?

Answer 105

Any problem with a list, such as attempting to access an index that is out of bounds

Question 106

What is a NullPointerException?

Answer 106

Any problem with dereferencing a null variable. For example, if you create a string variable named s but don't initialize it to a value (so it is null), calling the contains method on the null variable causes a NullPointerException

Question 107

What is a QueryException?

Answer 107

Any problem with SOQL queries such as assigning a query that returns no records or more than one recordto a singleton sObject variable

Question 108

What error will be thrown by the following piece of code? String s; Boolean b = s.contains('abc');

Answer 108

NullPointerException

Question 109

What error will be thrown by the following piece of code: List li = new List (); Integer i1= li[0] Integer i2=li[1];

Answer 109

ListException

Question 110

What error will be thrown by the following piece of code? List lm= [SELECT Name FROM Merchandise__c WHERE Name='XYZ'];

Answer 110

QueryException

Question 111

What is an SObjectException

Answer 111

Any problem with sObject records, such as attempting to change a field in an update statement that can only be changed during insert

Question 112

What error will be thrown by the following piece of code? ``` Invoice_Statement__c inv = new Invoice_Statement__c( Description__c='New Invoice'); insert inv; ``` Invoice_Statement__c v = [SELECT Name FROM Merchandise__c WHERE Id=:inv:Id]; String s = v.Description__c;

Answer 112

SOjbectException (because the description field was not retrieved)

Question 113

What is the Synchronous and Asynchronous limit for the total number of SOQL queries issued in a single apex transaction?

Answer 113

Synchronous: 100 Asynchronous: 200

Question 114

What is the limit of the total number of records retrieved by SOQL queries?

Answer 114

50,000

Question 115

What is the limit of the total number of records retrieved by Database.getQueryLocator?

Answer 115

10,000

Question 116

What is the total number of SOSL queries issued limit?

Answer 116

20

Question 117

What is the total number of records retrieved by a single SOSL query?

Answer 117

2000

Question 118

What is the total number of DML statements issued per apex transaction?

Answer 118

150

Question 119

What is the total stack depth for any Apex invocation that recursively fires triggers due to insert, update or delete statements

Answer 119

16

Question 120

What is the Total number of callouts (HTTP requests or Web service calls) in a transaction?

Answer 120

100

Question 121

What is the Maximum timeout for all callouts (HTTP requests or Web services calls) in a transaction?

Answer 121

120 seconds

Question 122

What is the maximum number of methods with the future annotation allowed per Apex invocation?

Answer 122

50

Question 123

What is the Total number of sendEmail methods allowed?

Answer 123

10

Question 124

What is the Synchronous and Asynchronous limits for the total Heap size?

Answer 124

Synchronous: 6MB Asynchronous: 12MB

Question 125

How can you rewrite the following piece of code to make it more efficient if it is to be called multiple times: Account refAcct = [SELECT Id FROM Account WHERE externalId__c='12345']; Contact c = new Contact(Account = refAcct.Id); insert c;

Answer 125

Remove the SOQL query and replace it as follows: Account refAcct = new Account(externalId__c = '12345'); Contact c = new Contact(Account = refAcct, LastName = 'Kay'); insert c;

Question 126

Which Asynchronous Apex Feature should you use for the following? - When you have a long-running method and need to prevent delaying an Apex transaction - When you make callouts to external Web services - To segregate DML operations and bypass the mixed save DML error

Answer 126

Future Mehtods

Question 127

Which Asynchronous Apex Feature should you use for the following? - To start a long-running operation and get an ID for it - To pass complex types to a job - To chain jobs

Answer 127

Queueable Apex

Question 128

Which Asynchronous Apex Feature should you use for the following? - For long-running jobs with large data volumes that need to be performed in batches, such as database maintenance jobs - For jobs that need larger query results than regular transactions allow

Answer 128

Batch Apex

Question 129

Which Asynchronous Apex Feature should you use for the following? To schedule an Apex class to run on a specific schedule

Answer 129

Scheduled Apex

Question 130

Name 2-4 Future Method Performance Best Practices

Answer 130

- Avoid adding large numbers of future methods to the asynchronous queue - Ensure that future methods execute as fast as possible - Test your future methods at scale - Consider using batch Apex instead of future methods to process large numbers of records

Question 131

Name 2-3 Apex Scheduler Best Practises

Answer 131

- Use extreme care if you're planning to schedule a class from a trigger. - Though it's possible to do additional processing in the execute method, we recommend that all processing take place in a separate class. - Synchronous Web service callouts are not supported from scheduled Apex.

Question 132

Name 4-6 Batch Apex best practices

Answer 132

- Use extreme care if you're planning to schedule a class from a trigger. - Use Database.Stateful with the class definition if you want to share instance member variables or data across job transactions. - Methods declared as future aren’t allowed in classes that implement the Database.Batchable interface. - Methods declared as future can't be called from a batch Apex class - All methods in the class must be defined as global or public.

Question 133

What happens if you set more than one savepoint and roll back to the first savepoint and then try and roll back to the second savepoint that was set?

Answer 133

The later savepoint variables become invalid. For example, if you generated savepoint SP1 first, savepoint SP2 after that, and then you rolled back to SP1, the variable SP2 would no longer be valid. You will receive a runtime error if you try to use it.

Question 134

Can you declare a savepoint as a static variable and use it across trigger contexts?

Answer 134

No, you will receive a run-time error

Question 135

What happens to static variables during a rollback?

Answer 135

Static variables are not reverted during a rollback. If you try to run the trigger again, the static variables retain the values from the first run.

Question 136

Which governor limit does the rollback count against?

Answer 136

Each rollback counts against the governor limit for DML statements. You will receive a runtime error if you try to rollback the database additional times.

Question 137

When using rollbacks, what is the impact of inserting an object before the rollback?

Answer 137

The ID on an sObject inserted after setting a savepoint is not cleared after a rollback. Create an sObject to insert after a rollback. Attempting to insert the sObject using the variable created before the rollback fails because the sObject variable has an ID. Updating or upserting the sObject using the same variable also fails because the sObject is not in the database and, thus, cannot be updated.

Question 138

How can you perform DML operations on more than one type of sObject in a single class?

Answer 138

1. Create a method that performs a DML operation on one type of sObject. 2. Create a second method that uses the future annotation to manipulate a second sObject type.

Question 139

If updating a user in a transaction with other sObjects in Apex Code .. which fields should you NOT also update to avoid getting a MIXED DML error message?

Answer 139

You can update a user in a transaction with other sObjects in Apex code saved using Salesforce API version 15.0 and later if the following fields are not also updated: - UserRoleId - IsActive - ForecastEnabled - IsPortalEnabled - Username - ProfileId

Question 140

What syntax do you use in Apex to reference a custom label?

Answer 140

System.Label.Label_name

Question 141

What syntax do you use in Visualforce and Lightning components to reference a custom label?

Answer 141

$Label.Label_name

Question 142

What is the Namespace for Chatter in Apex?

Answer 142

The ConnectApi namespace (also called Chatter in Apex) provides classes for accessing the same data available in Chatter REST API. Use Chatter in Apex to create custom Chatter experiences in Salesforce.