TypeScript

Q1.Typescript supports enum.

FALSE

TRUE

Q2.How to compile a module?

none of the above

tsc-m amd mymodule.ts

both A & B

tsc--module amd mymodule.ts

Q3.Which of these statements is true about JSX modes?

these modes only affect the emit stage

The preserve option keeps the JSX as part of the output so that it can be absorbed by another transform phase.

react mode output have .jsx as their file extension

react mode emits React.AddElement

Q4.____ is required to install typescript.

npm

nnm

npp

mpn

Q5.Which keyword declares a module?

type

declare

namespace

export

Q6.What is needed to debug a TypeScript file?

.js source map file

.tt source map file

.tsx source map file

.jsx source map file

Q7.Which of these are supported in TypeScript?

number

all of the above

string

boolean

Q8.JavaScript supports functional overloading.

TRUE

FALSE

Q9.Which of these is a tuple?

var employee:[number,string]=[1,"Steve"]

none of the above

var employee:(number|string)=123;

var employee=[1,'Bill'];

Q10.TypeScript supports all OOP principles.

FALSE

TRUE

Q11.TypeScript supports Modulus.

TRUE

FALSE

Q12.Which of these statements is true?

an interface cannot give out any JavaScript code

All of the above

an interface extends another interface in TypeScript

an interface extends a class in TypeScript

Q13.Server side and client side applications can be written using TypeScript.

TRUE

FALSE

Q14.TypeScript files cannot be debugged.

FALSE

TRUE

Q15.What is the output of the code: let arr=[10,20,30,40]; for (var val of arr) { console.log(val); }

compiler error

prints undefined

prints 1,2,3,4

prints 10,20,30,40

Q16.Which of these statements is true?

all of the above

TypeScript supports readonly and static members

TypeScript supports generics

TypeScript supports abstact class

Q17.Using what can we modify the behaviour of a class?

property decorators

class decorators

party decorators

class modifyer

Q18.Which of these is FALSE about internal modules?

it logically groups classes

it can be exported in another module

functions into one unit

makes coding complicated

Q19.When is rest parameter used in a function?

the function is called recursively

the type of parameter is not known

the number of parameters is not known

the function needs to be executed asynchronously

Q20.How to implement class constants?

const

con

readonly

readandwrite

Q21.Which of these is a backported feature of TypeScript?

arrow

modules

classes

methods

Q22.TypeScript is the typed superset of

JavaScript

ReactJS

C#

JAVA

Q23.When was typeScript made public?

41183

41609

41548

41244

Q24.Which of these is NOT an OOP principle?

subtraction

inheritence

encapsulation

polymorphism

Q25.Whcih keyword implements inheritence in TypeScript?

intends

extends

none of the above

inher

Your Score

- of - questions are answered correctly

Basics of TypeScript

For Support

Office Hours

We are on

Company

Customer Service

Help

Your Score

- of - questions are answered correctly

Login to view answer sheet

FORGOT PASSWORD

SIGN UP

Email Verification

Basics of TypeScript

For Support

Office Hours

We are on

Company

Customer Service

Help