Quiz #3

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1. What is the best approach to create an autonumber field like "2018/12-1", "2018/12-2", where "2018" is a current year, and "12" is a current month.

  1. Create formula field
  2. Create a custom field and implement a process builder
  3. Create a custom field and implement an apex trigger
  4. Create an autonumber field with the display format "YYYY/MM-{0}"

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The Answer is D.

You can create an autonumber field with the specified display format. A Display Format allows you to control the appearance of the Auto Number field. A Display Format consists of the substitution variables described below, plus any other characters you wish to include as a prefix or suffix.


Substitution Variables in Display Format

{0} Required Sequence number. One or more zeros enclosed in curly braces represent the sequence number itself. The number of zeros in the curly braces dictates the minimum number of digits that will be displayed. If the actual number has fewer digits than this, it will be padded with leading zeros. Maximum is 10 digits.
{YY}
{YYYY}
Optional Year. 2 or 4 "Y" characters enclosed in curly braces represent the year of the record creation date. You can display 2 digits (for example, "04") or all 4 digits (for example, "2004") of the year.
{MM} Optional Month. 2 "M" characters enclosed in curly braces represent the numeric month (for example, "01" for January, "02" for February) of the record creation date.
{DD} Optional Day. 2 "D" characters enclosed in curly braces represent the numeric day of the month (for example, "01" to "31" are valid days in January) of the record creation date.

Examples

Display Format Sequence Number Formatted Number Comments
{0} 1
250
5000
1
250
5000
No formatting. No leading zeros.
{000} 1
250
5000
001
250
5000
With leading zeros padded to 3 digits.
{000000} 1
250
5000
000001
000250
005000
With leading zeros padded to 6 digits.
{YYYY}{MM}-{0} 1
250
5000
201807-1
201807-250
201807-5000
4-digit year and month used as prefix to number.
PO# {00000000} 1
250
5000
PO# 00000001
PO# 00000250
PO# 00005000
Prefix with "PO# " (including space.)


2. How many object types can be created in one DML call?

  1. 1
  2. 5
  3. 10
  4. 150
  5. Unlimited

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The Answer is C. 

You can create records of up to 10 object types in one call. If the sObject array contains more than 10 chunks, Salesforce will throw the exception: "Cannot have more than 10 chunks in a single operation. Please rearrange the data to reduce chunking."

Let's see how Salesforce determines the number of chunks. You have a list with 10 items: account1, account2, contact1, account3, contact2, lead1, lead2.

Salesforce splits the records into five chunks:
1. account1, account2
2. contact1
3. account3
4. contact2
5. lead1, lead2

As you can see, a chunk is a subset of the input array, where each chunk contains records of one object type. I recommend you to use a sort method, that will rearrange records by object types, for example above you will have only three chunks. If you need to process more than 10 chunks, you should use additional call/calls.


3. How many fields can be tracked in the Field History Tracking?

  1. 20
  2. 25
  3. 50
  4. 500
  5. Unlimited

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The Answer is A.

You can track up to 20 standard and custom fields per object. For additional information about Track Field History see Track Field History for Standard Objects, Track Field History for Custom Objects.

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