TypeScript Interview Questions Your Guide to Success
TypeScript, a strongly typed superset of JavaScript, is essential for building scalable applications, making it a crucial skill for frontend developers, full-stack engineers, and software architects. Jobpe offers a curated collection of TypeScript interview questions, real-world scenarios, and expert guidance to help you excel in your next technical interview.
typescript
- Programming
What is TypeScript and how does it differ from JavaScript?
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript, adding static typing and features.
Explain the concept of interfaces in TypeScript.
Interfaces define contracts for objects, specifying the shape and types of properties.
How do generics work in TypeScript?
Generics provide a way to create reusable components that work with multiple types.
What are enums in TypeScript?
Enums allow defining a set of named constants.
How does TypeScript handle modules?
Modules help organize code by encapsulating related components, interfaces, and functions.
What is type inference in TypeScript?
TypeScript automatically infers types when they are not explicitly declared.
Explain union and intersection types.
Union types allow variables to hold multiple types; intersection types combine multiple types into one.
How are decorators used in TypeScript?
Decorators provide a way to add annotations and meta-programming syntax for classes and members.
What is the difference between 'any' and 'unknown' types?
'any' disables type checking; 'unknown' is safer, requiring type checking before use.
How does TypeScript improve developer experience?
Through static typing, better tooling, error detection, and code completion.
Programming
What is TypeScript and how does it differ from JavaScript?
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript, adding static typing and features.
Explain the concept of interfaces in TypeScript.
Interfaces define contracts for objects, specifying the shape and types of properties.
How do generics work in TypeScript?
Generics provide a way to create reusable components that work with multiple types.
What are enums in TypeScript?
Enums allow defining a set of named constants.
How does TypeScript handle modules?
Modules help organize code by encapsulating related components, interfaces, and functions.
What is type inference in TypeScript?
TypeScript automatically infers types when they are not explicitly declared.
Explain union and intersection types.
Union types allow variables to hold multiple types; intersection types combine multiple types into one.
How are decorators used in TypeScript?
Decorators provide a way to add annotations and meta-programming syntax for classes and members.
What is the difference between 'any' and 'unknown' types?
'any' disables type checking; 'unknown' is safer, requiring type checking before use.
How does TypeScript improve developer experience?
Through static typing, better tooling, error detection, and code completion.
