Top-notch Scala Test - 62+ MCQs: Scala test: Evaluate Your Expertise with Challenging Scala Questions and Answers

1. What is a higher-order function in Scala?

A function that takes another function as a parameter or returns a function

A function with a higher execution priority

A function that performs arithmetic operations on higher-order data types

A function with an increased level of abstraction

2. What is the difference between 'var' and 'val' in terms of mutability?

Both are Immutable

Both are Mutable

Var is Immutable, Val is Mutable

Var is Mutable, Val is Immutable

3. Which type of exception handling is used in Scala?

try-catch-finally

if-else

switch-case

goto

4. Which collection type in Scala is suitable for key-value pairs?

List

Array

Map

Set

5. What does 'var' keyword represent in Scala?

Constant

Mutable Variable

Immutable Variable

Function

6. How does Scala handle exceptions, and what is the primary construct for exception handling?

try-catch-finally

if-else

switch-case

goto

7. What is the purpose of the 'implicit' keyword in Scala?

Declare Variables

Define Functions

Enable Implicit Conversions

Override Methods

8. What is the significance of 'match' keyword in Scala?

Pattern Matching

Conditional Statements

Function Declaration

Error Handling

9. In Scala, what does 'sealed' trait or class mean?

No Inheritance Allowed

Open for Extension

Final and Closed

Immutable

10. In Scala, what is the 'apply' method commonly used for in companion objects?

Create Instances

Define Constants

Override Methods

Handle Exceptions

Scala MCQ Test 5