IK Interview Knowledge Book

Topics Practice Examples Playground

RU

Computer Science and Algorithms 4
JavaScript Core 8
TypeScript 4
HTML, CSS, and Browser Platform 3
Frontend Frameworks 4
Node.js, APIs, and Security 6
Testing, Design, and Architecture 9
System Design and Data 2
- Databases and Storage 9
- ORM and Data Access 6
Tooling, Platform, and Process 10

JavaScript Core Types and values

foundation

Types and values

Primitive values, objects, nullish values, coercion, and equality semantics.

Practice for this topic

Which defaulting expression preserves 0, false, and an empty string as real values?Which statements about prototype lookup are correct?Why are two object literals with the same shape not equal with ===?What does this program print?

Runnable examples

Coercion and equality table