the recruiter will ask this question many times on zoom. the questions are basic javascript questions, like null vs undefined, object reference, HTML, CSS, change detection on angular.Null vs Undefined Object reference vs variable reference Change detection Observable vs Promise Falsey value == VS === Ans. == compares values === is used in scripting languages for comparing two values as well as their data type. Stackling forEach() vs map forEach-It calls a function for each element in the array. HTML5, CSS3, and SASS or LESS—>css connect Lazy loading