- (Exam Topic 3)
As part of a new integration, a developer is asked to implement a new custom search functionality that is capable of performing unrestricted queries and can account for all values within a custom picklist field, type z, on the Opportunity object. The search feature must also account for NULL values.
The organization-wide default for the Opportunity object is set to Public Read-Only, and a new custom index has.
been created for the Type__c field. There are more than 5 million Opportunity records within the environment. and a considerable amount of the existing records have NULL values for the picklist
Which technique should the developer implement to maximize performance when querying NULL values?

1. A. Create a formula field that substitutes NULL values for a string of text, create an index for the formula field, then use the formula within the WHERE clause.
2. B. Perform two SOQL queries; one to query Opportunities where Type__c - NULL, and another to query where Type_: - HBLL, then join the result set using Apex.
3. C. Use a SOSL query to return ALL opportunities that have a value of NULL in any field.
4. D. Use the OS operator to combine WHERE clauses to strictly search for each value within the picklist, including Type__c ‘ NULL.

Correct Answer: B

- (Exam Topic 1)
Line 1 public class AttributeTypes Line 2 { Line 3 private final String[] arrayItems; Line 4 Line 5
@AuraEnabled Line 6 public List getStringArray() { Line 7 Strings+ arrayItems = new String*+, 'red', 'green', 'blue' -; Line 8 return arrayItems; Line 9 } Line 10 } Consider the Apex controller above that is called from a Lightning Aura Component. What is wrong with it?

1. A. Line 1: class must be global
2. B. Lines 1 and 6: class and method must be global
3. C. Line 6: method must be static
4. D. Line 8: method must first serialize the list to JSON before returning

Correct Answer: C

- (Exam Topic 1)
A developer encounters an error that states that the Apex heap size is exceeded. Which technique may reduce heap size?

1. A. Add the transient keyword to the variable definition
2. B. Move the variable definition inside the scope of the function
3. C. Use static variables instead of instance variables
4. D. Use SOQL for loops instead of standard SOQL queries

Correct Answer: D

- (Exam Topic 3)
A developer is developing a reusable Aura component that will reside on an sObject Lightning page with the following HTML snippet:
Caura: component implements-“forcethaaRecordid, flexipage:availableForAllPageTypes”>

1. A. Use the getSObjectType () method in an Apex class
2. B. Create a design attribute and configure via App Builder
3. C. Set the object type as a component attribute.
4. D. Add force:hasSobjectName to the implements attribute

Correct Answer: D

- (Exam Topic 1)
What is the transaction limit on the number of callouts?

1. A. 100
2. B. 150
3. C. 50
4. D. 200
5. E. There is no limit

Correct Answer: C