SP Programming Fundamentals 2

Question 1

Which Apex collection type enforces uniqueness of its elements?

Accepted Answer

Set

Answer

A Set in Apex automatically enforces uniqueness, preventing duplicate values.

Question 2

What is the result of executing `Integer x = 10 / 3;` in Apex?

Accepted Answer

3

Answer

Integer division in Apex truncates the decimal, so 10 / 3 equals 3.

Question 3

Which keyword makes an Apex class available for extension by other classes?

Accepted Answer

virtual

Answer

The `virtual` keyword allows other classes to extend and override the class's methods.

Question 4

A developer writes a SOQL query inside a `for` loop processing 300 records. What Salesforce limit does this risk violating?

Accepted Answer

SOQL queries per transaction limit

Answer

Running SOQL inside a loop can exceed the 100 SOQL queries per transaction governor limit.

Question 5

Which Apex access modifier restricts a method to be called only within the same class?

Accepted Answer

private

Answer

`private` limits access to only the defining class, the most restrictive modifier.

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