
OOPs and Database using Apex
Authored by mahsooq k
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Professional Development
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6 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the primary purpose of encapsulation in Apex?
To define a blueprint for creating objects.
To allow a class to inherit properties from multiple classes.
To hide the internal state of an object and restrict direct access to it, exposing only necessary functionality.
To provide different implementations for a method in different classes.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which DML operation is used to update existing records in Salesforce?
update
upsert
delete
insert
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In Apex, if Animal is an abstract class and Dog extends Animal, which statement accurately describes polymorphism when working with these classes?
Polymorphism is primarily achieved through static methods in both Animal and Dog.
A Dog object can be assigned to an Animal variable, allowing calls to common methods defined in Animal.
The Dog class must override all non-abstract methods from the Animal class.
An Animal object can be directly instantiated and used without defining specific animal types.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which Apex collection type guarantees unique elements and does not maintain insertion order?
Array
List
Map
Set
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In Apex, what will be the output of the following code snippet?
Second
Third
Error
First
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What's the output of this code snippet?
From A From B
From B From A
From A From A
From B From B
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