Kotlin Basics

Kotlin Basics - Important Points

1.		What is Kotlin?

A. A programming language

B. A database management system

C. A web framework

D. A markup language

View Answer Discuss Work Space

Answer: option a

Explanation:

Kotlin is a programming language designed to be concise, expressive, and safe.

2.		What is the primary use case of Kotlin?

A. Mobile app development

B. Web development

C. Database management

D. Machine learning

View Answer Discuss Work Space

Answer: option a

Explanation:

Kotlin is the official language for Android development and is commonly used for building mobile apps.

3.		Which of the following is true about variables in Kotlin?

A. They must be explicitly declared with a type.

B. They can be implicitly declared without a type.

C. They cannot be reassigned once initialized.

D. They are always mutable.

View Answer Discuss Work Space

Answer: option b

Explanation:

In Kotlin, you can use type inference to declare variables without specifying the type explicitly.

4.		Which of the following is a valid identifier in Kotlin?

A. var

B. my-variable

C. 123foo

D. MyClass

View Answer Discuss Work Space

Answer: option d

Explanation:

In Kotlin, identifiers can consist of letters, digits, underscores, and dollar signs, but cannot start with a digit.

5.		What is the difference between val and var in Kotlin?

A. val is immutable while var is mutable.

B. var is immutable while val is mutable.

C. Both val and var are immutable.

D. Both val and var are mutable.

View Answer Discuss Work Space

Answer: option a

Explanation:

val is used to declare immutable variables, while var is used to declare mutable variables.

Worried about Placements?

Get on FAST TRACK COURSE

Kotlin Basics

Subscribe for Latest Career Trends

Use AI and ChatGPT for Career Guidance

Unlock Your Future

Worried for Placements in 2024?

Join FAST TRACK Course

Supercharge Your SUCCESS

Join All in One Placement Mock Tests-2024