- How do you make issue queries/mutations to a graphql server - how do you create graphql server ? What things you need ? - What is directive in graphql ? What is Fragment in GraphQL ? - How do you write unit tests for your Queries/Mutation (on server side) - TypeScript basics - Partial in TS - Decorators - union & discriminating unions - What are Generics in TS ? simple example - useCallback vs useMemo - call parent func from child component in React
Closure, Function currying, promises, observable, some standard question of js and angular.
Explica el rendimiento de algunos algoritmos especificos con la Big O notation.
- ES6, hoisting, currying - ReactJS hooks & lifecycle methods - Redux and its flow
Array.prototype Closure Hoisting React reconcillation
Make a payment flow full in one hour in reactjs with testing proper tailwind class, proper structure also they didn't provide any API for the same.
Basic question in web tech
They asked me to explain how I’d optimize a slow web page—what I’d measure first (LCP, TTFB, bundle size), how I’d find bottlenecks, and what fixes I’d prioritize).
1. Given binary matrix write algorithm to find rectangle with largest area. e.g. [ [1,0,0,0] [0,1,1,1] [0,1,1,1] [0,0,0,0] 2. Analog to MS paint where you click a point, and all connected areas are auto filled with a color, you're given a matrix/grid with random number in it, so write a function that takes as parameters: canvas (matrix), x/y coordinates, and the color number to replace with. e.g. coordinates: 1,3, newColor:3 [[0,1,1,2,0,1] [1,0,2,2,1,1] [1,0,2,2,2,0]] so all adjacent 2's should be replaced with 3 3. Design front-end for an online chess game 4. Manager interview, just conversation about the interview process and about your background
Live coding interview, topics: API calls, data mapping, and rendering, error handling, unit testing.
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