Gainsight Interview Questions, Process, and Tips

Round duration - 45 minutes
Round difficulty - Medium

Technical round with questions on Javascript mainly.

Q1. What happens when you call a function using the new keyword?
Ans. 
Calling a function using the new keyword creates a new instance of the function's constructor.
• Creates a new empty object

• Binds 'this' to the new object

• Adds a property to the new object called '__proto__' which points to the constructor function's prototype object

• Returns the new object
Answered by AI
Add your answer
Q2. How can you import all exports of a file as an object in JavaScript?
Ans. 
You can import all exports of a file as an object in JavaScript using the 'import * as' syntax.
• Use the 'import * as' syntax followed by the object name and 'from' keyword to import all exports of a file as an object.

• For example: import * as myExports from './myFile.js';

• You can then access the exports using dot notation, like myExports.myFunction().
Answered by AI
Add your answer
Q3. What is the purpose of the 'this' operator in JavaScript?
Ans. 
The 'this' operator in JavaScript refers to the current context or object.
• Refers to the current object or context in which a function is being executed

• Can be used to access properties and methods of the current object

• The value of 'this' is determined by how a function is called
Answered by AI
Add your answer
Q4. What are arrow functions in JavaScript?
Ans. 
Arrow functions are a concise way to write functions in JavaScript.
• Arrow functions are defined using the '=>' syntax.

• They have a shorter syntax compared to traditional function expressions.

• They do not have their own 'this' keyword, instead they inherit it from the parent scope.

• Example: const add = (a, b) => a + b;
Answered by AI
Add your answer

Round duration - 45 minutes
Round difficulty - Easy

Technical round with questions on Angular mainly.

Q1. What is AOT compilation in Angular?
Ans. 
AOT compilation in Angular stands for Ahead-of-Time compilation, which compiles Angular templates and components during the build process.
• AOT compilation improves the performance of Angular applications by pre-compiling the templates and components before the browser downloads and runs them.

• It detects template errors during the build process rather than at runtime, leading to faster rendering and reduced bundle size.

• AO...read more
Answered by AI
Add your answer
Q2. How are observables different from promises?
Ans. 
Observables are streams that can emit multiple values over time, while promises can only emit a single value.
• Observables can emit multiple values over time, while promises can only emit a single value.

• Observables are cancellable, while promises are not.

• Observables support operators like map, filter, and reduce for transforming data streams, while promises do not.

• Observables are lazy, meaning they do not run until they ...read more
Answered by AI
Add your answer