TypeScript Basics

1/25 Which of the following companies has developed and designed TypeScript?
- Amazon
- TypeScript
- Microsoft
- Oracle
2/25 What is the typing principle of typescript?
- Gradual
- Duck
- Dynamic
- All of the above
3/25 Which of the following filenames is the extension for typescript?
- .tt
- .nod
- .ts
- .txt
4/25 All are backported features of TypeScript, except….
- Arrows
- Classes
- Modules
- Methods
5/25 Which of the options below power the interactive TypeScript experience in Visual Studio, Vs Code, Sublime, the TypeScript playground and other editor.
- TypeScript main
- TypeScript language
- TypeScript compiler
- TypeScript method
6/25 ..... are the way of organizing a code in TypeScript.
- Methods
- Modules
- Arrows
- Classes
7/25 The TypeScript components are....
- TypeScript Compiler
- TypeScript Language Service
- TypeScript Language
- All of the above
8/25 What are considered the types of access modifiers supported by TypeScript?
- Public
- Private
- Protected
- All of the above
9/25 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
10/25 How can you declare a read-only property in a TypeScript class?
- Using the 'readonly' keyword
- Using the 'const' keyword
- Using the 'static' keyword
- Using the 'final' keyword
11/25 What is the TypeScript syntax for defining an enumeration?
```
enum Direction { Up, Down, Left, Right }
```
- Correct as is
- enum Direction = { Up, Down, Left, Right }
- enum Direction [ Up, Down, Left, Right ]
- enum { Up, Down, Left, Right } as Direction
12/25 In TypeScript, which method decorator can be used to bind 'this' to the class instance?
- .bind()
- .apply()
- .call()
- .link()
13/25 What is the TypeScript utility type used for creating a type with all properties of an existing type set to optional?
- Partial<T>
- Required<T>
- Readonly<T>
- Pick<T>
14/25 Which TypeScript feature is primarily used for extending classes and interfaces?
- Generics
- Inheritance
- Modules
- Namespaces
15/25 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
16/25 What TypeScript utility type makes all properties of an object optional?
- Partial
- Readonly
- Record
- Required
17/25 In TypeScript, which operator is used for type assertion?
- :
- as
- =
- ->
18/25 In TypeScript, what is a Tuple?
- A type of function
- An array with fixed number of elements
- A JSON object
- A method for type casting
19/25 Which command is used to compile a TypeScript file?
- ts-compile
- typescript
- tsc
- ts-run
20/25 In TypeScript, how do you annotate a variable of a custom type?
- Using the 'type' keyword
- By specifying the type after the variable name
- Using the 'var' keyword
- Type annotation is not supported
21/25 Which of the following is true about TypeScript's compatibility with JavaScript?
- TypeScript is incompatible with JavaScript
- TypeScript can use JavaScript libraries
- JavaScript code must be rewritten to use in TypeScript
- TypeScript does not support JavaScript syntax
22/25 In TypeScript, which of the following is a correct way to define an enum?
- enum Direction { Up, Down, Left, Right }
- enum Direction = { Up, Down, Left, Right }
- Direction = ['Up', 'Down', 'Left', 'Right']
- enum Direction ( Up, Down, Left, Right )
23/25 What TypeScript feature allows for custom type checks at compile time?
- Type Guards
- Interfaces
- Decorators
- Mixins
24/25 In TypeScript, which operator is used for type assertions?
- as
- typeof
- instanceof
- <>
25/25 Which TypeScript feature allows you to work with variables of unknown types in a safe way?
- Any type
- Unknown type
- Void type
- Never type
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TypeScript Basics

1/25 Which of the following companies has developed and designed TypeScript?

2/25 What is the typing principle of typescript?

3/25 Which of the following filenames is the extension for typescript?

4/25 All are backported features of TypeScript, except….

5/25 Which of the options below power the interactive TypeScript experience in Visual Studio, Vs Code, Sublime, the TypeScript playground and other editor.

6/25 ..... are the way of organizing a code in TypeScript.

7/25 The TypeScript components are....

8/25 What are considered the types of access modifiers supported by TypeScript?

9/25 What will be output of the following expression?

10/25 How can you declare a read-only property in a TypeScript class?

11/25 What is the TypeScript syntax for defining an enumeration?

12/25 In TypeScript, which method decorator can be used to bind 'this' to the class instance?

13/25 What is the TypeScript utility type used for creating a type with all properties of an existing type set to optional?

14/25 Which TypeScript feature is primarily used for extending classes and interfaces?

15/25 What is the primary use case for TypeScript decorators?

16/25 What TypeScript utility type makes all properties of an object optional?

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

18/25 In TypeScript, what is a Tuple?

19/25 Which command is used to compile a TypeScript file?

20/25 In TypeScript, how do you annotate a variable of a custom type?

21/25 Which of the following is true about TypeScript's compatibility with JavaScript?

22/25 In TypeScript, which of the following is a correct way to define an enum?

23/25 What TypeScript feature allows for custom type checks at compile time?

24/25 In TypeScript, which operator is used for type assertions?

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