I want to know about the preparation and skills required to clear the platform developer 2 certification in salesforce. I'm 2 years experienced in salesforce.

Thanks and Regards,
Shiva RV

Hi,
Can you please help me out by answering these questions.
A company wants a recruiting app that models candidates and interviews; displays the total number of interviews on each candidate record; and defines security on interview records that is independent from the security on candidate records.What would a developer do to accomplish this task? 
Choose 2 answers.
A) Create a lookup relationship between the Candidate and Interview objects.
B) Create a trigger on the Interview object that updates a field on the Candidate object
C) Create a roll-up summary field on the Candidate object that counts Interview records.
D) Create a master-detail relationship between the Candidate and Interview objects.
 
Hoping the Ans as :A,B

2) In the Lightning Component framework, which resource can be used to fire events?ans: A,B
Choose 2 answers
Third-party Javascript code.
Javascript controller actions.
Visualforce controller actions.
Third-party web service code.

Hoping as Ans: A,B

3) What is a capability of formula fields? 
 
   Choose 3 answer 
 
A) Generate a link using the HIPERLINK function to a specific record in a legacy system
B) Determine if a datetime field has passed using the NOW function
C) Determine which of three different images to display using IF function
D) Return and display a field value from another object using the VLOOKUP function
E) Display the previous value for a field using the PRIORVALUE funtion

I think Ans: B,C,D

4)A developer wants to display all the available record types for a case Object. The developer also wants to display the picklist values for the Case.Status field. The Case Object and the Case.Status field are on a Custom Visualforce page.
Which action can the developer perform to get the record types and picklist values in the controller?
Choose 2 answers. 
Use Schema.PicklistEntry returned by Case.Status.getDescribe().getPicklistValues()
Use Schema.RecordTypeInfo returned by Case.sObjectType.getDescribe().getRecordTypeInfos()
Use SOQL to query Case records in the org to get all values for the Status picklist field
Use SOQL to query Case records in the org to get all the RecordType values available for Case 

I think Ans:A,B

5) A developer writes a SOQL query to find child records for a specific parent. Ans:5



 



How many levels can be returned in a single query?

A. 1
B. 7
C. 5
D. 3
 
Confused between option A and C.Please clarify these questions.

Thanks in advance for your help.