TypeScript Basics

1/25 What is the typing principle of typescript?
- Gradual
- Duck
- Dynamic
- All of the above
2/25 Which of the following filenames is the extension for typescript?
- .tt
- .nod
- .ts
- .txt
3/25 Which of the computer programming languages below has influenced the creation of typescript?
- JavaScript
- Java
- C#
- All of the above
4/25 A typescript may be installed or managed through…
- Tag
- Nmp
- Space
- Void
5/25 Which of the following is a Typescript feature?
- Typescript can be compiled to all major versions of Javascript(ES3,ES5,ES6,ES7).
- Once can use Typescript for cross -browser development. It is an open source project.
- Typescript is considered a superset of JavaScript, providing typed nature to the code.
- All of the above.
6/25 What are considered the types of access modifiers supported by TypeScript?
- Public
- Private
- Protected
- All of the above
7/25 What does Typescript use for anonymous functions?
- "dot" syntax
- "arrow" syntax
- none of the above
8/25 What will be output of the following expression?
```
let a:string=47; 
     console.log( " Value of a= " +a);
```
- Value of a=47
- Value of a=0
- Value of a=
- None of the above
9/25 In TypeScript, which access modifier makes members accessible only within their declaring class?
- Private
- Public
- Protected
- Internal
10/25 What TypeScript feature is used to add static type checking to JavaScript arrays?
- Generic Types
- Union Types
- Tuple Types
- Any Type
11/25 How does TypeScript handle null and undefined by default in strict mode?
- They are considered the same as empty string
- They are ignored
- They are treated as separate types
- They cause a compilation error
12/25 How can TypeScript enhance code maintainability compared to JavaScript?
- By enabling stronger typing
- By executing faster
- By reducing the number of lines of code
- By incorporating more libraries
13/25 What is the primary use case for TypeScript decorators?
- To add new syntax to the language
- To provide metadata programming
- For optimizing memory usage
- To enable asynchronous programming
14/25 What TypeScript utility type makes all properties of an object optional?
- Partial
- Readonly
- Record
- Required
15/25 Which TypeScript feature is used to ensure function parameters match the expected type?
- Type assertions
- Type inference
- Type annotations
- Type guards
16/25 What does the 'any' type in TypeScript represent?
- A type that can only hold null values
- A type-safe way of declaring variables
- A type that can hold any kind of value
- A restricted type for function parameters
17/25 In TypeScript, which operator is used for type assertion?
- :
- as
- =
- ->
18/25 Which command is used to compile a TypeScript file?
- ts-compile
- typescript
- tsc
- ts-run
19/25 Which method is used to convert a TypeScript file to JavaScript?
- ts-compile
- tsc
- ts-convert
- typescript-compile
20/25 What TypeScript feature allows for custom type checks at compile time?
- Type Guards
- Interfaces
- Decorators
- Mixins
21/25 What TypeScript feature allows for specifying an array where order and type of elements are fixed?
- Enums
- Tuples
- Generics
- Interfaces
22/25 In TypeScript, which operator is used for type assertions?
- as
- typeof
- instanceof
- <>
23/25 Which TypeScript feature allows you to work with variables of unknown types in a safe way?
- Any type
- Unknown type
- Void type
- Never type
24/25 What TypeScript feature allows you to conditionally select a type?
- Union types
- Conditional types
- Intersection types
- Mapped types
25/25 In TypeScript, which type is used when a function never returns a value?
- Void
- Undefined
- Null
- Never
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TypeScript Basics

1/25 What is the typing principle of typescript?

2/25 Which of the following filenames is the extension for typescript?

3/25 Which of the computer programming languages below has influenced the creation of typescript?

4/25 A typescript may be installed or managed through…

5/25 Which of the following is a Typescript feature?

6/25 What are considered the types of access modifiers supported by TypeScript?

7/25 What does Typescript use for anonymous functions?

8/25 What will be output of the following expression?

9/25 In TypeScript, which access modifier makes members accessible only within their declaring class?

10/25 What TypeScript feature is used to add static type checking to JavaScript arrays?

11/25 How does TypeScript handle null and undefined by default in strict mode?

12/25 How can TypeScript enhance code maintainability compared to JavaScript?

13/25 What is the primary use case for TypeScript decorators?

14/25 What TypeScript utility type makes all properties of an object optional?

15/25 Which TypeScript feature is used to ensure function parameters match the expected type?

16/25 What does the 'any' type in TypeScript represent?

17/25 In TypeScript, which operator is used for type assertion?

18/25 Which command is used to compile a TypeScript file?

19/25 Which method is used to convert a TypeScript file to JavaScript?

20/25 What TypeScript feature allows for custom type checks at compile time?

21/25 What TypeScript feature allows for specifying an array where order and type of elements are fixed?

22/25 In TypeScript, which operator is used for type assertions?

23/25 Which TypeScript feature allows you to work with variables of unknown types in a safe way?

24/25 What TypeScript feature allows you to conditionally select a type?

25/25 In TypeScript, which type is used when a function never returns a value?