Q491. What is the comma operator?
The comma operator is used to evaluate each of its operands from left to right and returns the value of the last operand. This is totally different from comma usage withi...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (780 available).
Active:
Tag: js ×
Q492. What is the advantage of the comma operator?
It is normally used to include multiple expressions in a location that requires a single expression. One of the common usages of this comma operator is to supply multiple...
Q493. What is typescript?
TypeScript is a typed superset of JavaScript created by Microsoft that adds optional types, classes and many other features, and compiles to plain JavaScript. Angular is ...
Q494. What are the differences between javascript and typescript?
Below are the list of differences between javascript and typescript, | feature | typescript | javascript | | ------------------- | ------------------------------------- |...
Q495. What are the advantages of typescript over javascript?
Below are some of the advantages of typescript over javascript, 1. TypeScript is able to find compile time errors at the development time only and it makes sures less run...
Q496. What is an object initializer?
An object initializer is an expression that describes the initialization of an Object. The syntax for this expression is represented as a comma-delimited list of zero or ...
Q497. What is a constructor method?
The constructor method is a special method for creating and initializing an object created within a class. If you do not specify a constructor method, a default construct...
Q498. What happens if you write constructor more than once in a class?
The "constructor" in a class is a special method and it should be defined only once in a class. i.e, If you write a constructor method more than once in a class it will t...
Q499. How do you call the constructor of a parent class?
You can use the `super` keyword to call the constructor of a parent class. Remember that `super()` must be called before using `this` reference. Otherwise it will cause a...
Q500. How do you get the prototype of an object?
You can use the `Object.getPrototypeOf(obj)` method to return the prototype of the specified object. i.e. The value of the internal `prototype` property. If there are no ...