TypeScript Basics

1/25 Which of the following filenames is the extension for typescript?
- .tt
- .nod
- .ts
- .txt
2/25 Which of the computer programming languages below has influenced the creation of typescript?
- JavaScript
- Java
- C#
- All of the above
3/25 All are backported features of TypeScript, except….
- Arrows
- Classes
- Modules
- Methods
4/25 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
5/25 A typescript may be installed or managed through…
- Tag
- Nmp
- Space
- Void
6/25 What object oriented terms does Typescript support?
- Interfaces
- Classes
- Modules
- All of the above
7/25 ..... are the way of organizing a code in TypeScript.
- Methods
- Modules
- Arrows
- Classes
8/25 What does Typescript use for anonymous functions?
- "dot" syntax
- "arrow" syntax
- none of the above
9/25 By which type below are integers represented?
- Int32
- Int
- Int64
- Number
10/25 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
11/25 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
12/25 What TypeScript feature enables conditional type checks?
- Generics
- Type inference
- Conditional types
- Enumerated types
13/25 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
14/25 What TypeScript feature is used for defining a variable that can have one of a set of named constants?
- Enum
- Union type
- Interface
- Tuple
15/25 Which TypeScript feature is primarily used for extending classes and interfaces?
- Generics
- Inheritance
- Modules
- Namespaces
16/25 How does TypeScript enhance debugging in comparison to plain JavaScript?
- By providing more detailed error messages during compile time
- By eliminating the need for debugging
- By automatically correcting syntax errors
- By increasing runtime performance
17/25 In TypeScript, which keyword is used to declare a constant variable?
- let
- var
- const
- static
18/25 TypeScript is a superset of which language?
- JavaScript
- Java
- Python
- C++
19/25 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
20/25 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
21/25 Which is not a valid TypeScript data type?
- undefined
- number
- bigint
- byte
22/25 In TypeScript, which access modifier makes a member visible only within its containing class?
- Public
- Private
- Protected
- Static
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 How do you declare a readonly array in TypeScript?
- const[]
- readonly[]
- immutable[]
- fixed[]
25/25 In TypeScript, what is the purpose of the 'keyof' keyword?
- To create an enum
- To specify a generic constraint
- To define a method
- To declare a variable
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TypeScript Basics

1/25 Which of the following filenames is the extension for typescript?

2/25 Which of the computer programming languages below has influenced the creation of typescript?

3/25 All are backported features of TypeScript, except….

4/25 Which of the options below power the interactive TypeScript experience in Visual Studio, Vs Code, Sublime, the TypeScript playground and other editor.

5/25 A typescript may be installed or managed through…

6/25 What object oriented terms does Typescript support?

7/25 ..... are the way of organizing a code in TypeScript.

8/25 What does Typescript use for anonymous functions?

9/25 By which type below are integers represented?

10/25 What will be output of the following expression?

11/25 How can you declare a read-only property in a TypeScript class?

12/25 What TypeScript feature enables conditional type checks?

13/25 How can TypeScript enhance code maintainability compared to JavaScript?

14/25 What TypeScript feature is used for defining a variable that can have one of a set of named constants?

15/25 Which TypeScript feature is primarily used for extending classes and interfaces?

16/25 How does TypeScript enhance debugging in comparison to plain JavaScript?

17/25 In TypeScript, which keyword is used to declare a constant variable?

18/25 TypeScript is a superset of which language?

19/25 In TypeScript, what is a Tuple?

20/25 Which of the following is true about TypeScript's compatibility with JavaScript?

21/25 Which is not a valid TypeScript data type?

22/25 In TypeScript, which access modifier makes a member visible only within its containing class?

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

24/25 How do you declare a readonly array in TypeScript?

25/25 In TypeScript, what is the purpose of the 'keyof' keyword?