Interview Questions and Answers for 'Script' | Search Interview Question

Interview Questions and Answers - Order By Rating

Q31. What is the difference between method and function in Typescript ?

TypeScript

Ans. Method belongs to a class whereas function isn't. So the only difference is the scope in which they are defined.

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Q32. Explain interfaces in Typescript. How is it different compared to other languages ?

TypeScript

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Q33. How Object-Oriented Programming is implemented in JavaScript? How they differ from other languages?

Javascript

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Q34. What is arrow function in Typescript ?

TypeScript

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Q35. Can we do type casting in Typescript ?

TypeScript

Ans. Yes

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Q36. What is the type of variable if we don't set any type ?

TypeScript

Ans. Any

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Q37. How is the declaration of enum in Typescript differ from Javascript ?

TypeScript

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Q38. What are benefits of strongly typing variables ?

JavaScript

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Q39. Difference between Let and Var in Javascript ?

JavaScript

Ans. Var scopes the variable to the nearest function whereas Let scopes the variable to nearest block.

For example -

function printNumbers() {
for(var i = 1; i < 3: i++){
console.log(i);
}

console.log(i); // works fine and will print 3 as i has a function scope and not local loop scope
}

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Q40. prototypal inheritance in Javascript

JavaScript

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Q41. Have you had to work with memory leak problems in javascript ?

JavaScript

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Q42. Write a method to track every click on a page.

JavaScript

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Q43. What is the difference between inheritance in PHP vs. Javascript?

JavaScript

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Q44. What is Defer Parsing JavaScript ?

JavaScript

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Q45. What are the ways we can get over XSS or cross site scripting vulnerability ?

Security

Ans. The counter measures of XSS are input validation and implementing a CSP (Content Security Policy).

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Q46. How do you debug Javascript code ?

Javascript

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Q47. What does 'variable hoisting' mean?

JavaScript

Ans.

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Q48. What is the use of this keyword in javascript ?

Javascript

Ans. This keyword refers to the current instance of the class.

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Q49. Can we compile multiple type script files together ? How ?

TypeScript

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Q50. How to compile typescript ?

TypeScript

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Q51. What are the features of TypeScript ?

TypeScript

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Q52. What is type script ? What are the advantages of typescript ? How is it different than javascript ?

TypeScript

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Q53. What is the use of map method in typescript ?

TypeScript

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Q54. Can we set specific return type of a method in typescript ?

TypeScript

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Q55. Why type has been deprecated and replaced by interfaces ?

TypeScript

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Q56. Difference between interface and class in typescript ?

TypeScript

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Q57. Difference between interface and type ?

TypeScript

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Q58. What are the different data types in typescript ?

TypeScript

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Q59. Difference between Let and Var ?

TypeScript

Ans. Let creates a variable with a local scope whereas var creates it with a global scope.

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Q60. Difference between == and === ?

JavaScript

Ans. == compares values === is used in scripting languages for comparing two values as well as there data tpe. like in js,php.

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