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 computer programming languages below has influenced the creation of typescript?
- JavaScript
- Java
- C#
- All of the above
4/25 What object oriented terms does Typescript support?
- Interfaces
- Classes
- Modules
- All of the above
5/25 What are considered the types of access modifiers supported by TypeScript?
- Public
- Private
- Protected
- All of the above
6/25 What does Typescript use for anonymous functions?
- "dot" syntax
- "arrow" syntax
- none of the above
7/25 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
8/25 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
9/25 What TypeScript feature is used to add static type checking to JavaScript arrays?
- Generic Types
- Union Types
- Tuple Types
- Any Type
10/25 How does TypeScript support asynchronous programming?
- Using `async` and `await` keywords
- Callback functions
- Synchronous functions
- TypeScript does not support asynchronous programming
11/25 In TypeScript, what does the 'never' type represent?
- A type that never returns a value
- An unknown type
- A type that always returns a value
- A void type
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 TypeScript feature is used for defining a variable that can have one of a set of named constants?
- Enum
- Union type
- Interface
- Tuple
14/25 Which TypeScript feature is primarily used for extending classes and interfaces?
- Generics
- Inheritance
- Modules
- Namespaces
15/25 In TypeScript, which operator is used for type assertion?
- :
- as
- =
- ->
16/25 Which command is used to compile a TypeScript file?
- ts-compile
- typescript
- tsc
- ts-run
17/25 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
18/25 What is the key advantage of using TypeScript over JavaScript?
- Faster runtime execution
- Type safety and easier debugging
- Support for older browsers
- Smaller file size
19/25 In TypeScript, which is used to define a variable that can hold any type but only one type once set?
- any
- var
- let
- generic
20/25 What TypeScript feature allows for specifying an array of multiple data types?
- Union Types
- Generics
- Enum
- Any
- Tuple
21/25 Which operator is used for type assertions in TypeScript?
- as
- is
- typeof
- instanceof
22/25 What is the purpose of the 'never' type in TypeScript?
- To represent any type of value
- To represent values that never occur
- To declare a variable without a type
- To define optional parameters
23/25 Which is not a valid TypeScript data type?
- undefined
- number
- bigint
- byte
24/25 What TypeScript feature allows for specifying an array where order and type of elements are fixed?
- Enums
- Tuples
- Generics
- Interfaces
25/25 In TypeScript, which access modifier makes a member visible only within its containing class?
- Public
- Private
- Protected
- Static
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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 computer programming languages below has influenced the creation of typescript?

4/25 What object oriented terms does Typescript support?

5/25 What are considered the types of access modifiers supported by TypeScript?

6/25 What does Typescript use for anonymous functions?

7/25 What will be output of the following expression?

8/25 How can you declare a read-only property in a TypeScript class?

9/25 What TypeScript feature is used to add static type checking to JavaScript arrays?

10/25 How does TypeScript support asynchronous programming?

11/25 In TypeScript, what does the 'never' type represent?

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

13/25 What TypeScript feature is used for defining a variable that can have one of a set of named constants?

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

15/25 In TypeScript, which operator is used for type assertion?

16/25 Which command is used to compile a TypeScript file?

17/25 Which of the following is true about TypeScript's compatibility with JavaScript?

18/25 What is the key advantage of using TypeScript over JavaScript?

19/25 In TypeScript, which is used to define a variable that can hold any type but only one type once set?

20/25 What TypeScript feature allows for specifying an array of multiple data types?

21/25 Which operator is used for type assertions in TypeScript?

22/25 What is the purpose of the 'never' type in TypeScript?

23/25 Which is not a valid TypeScript data type?

24/25 What TypeScript feature allows for specifying an array where order and type of elements are fixed?

25/25 In TypeScript, which access modifier makes a member visible only within its containing class?