Functional coding interview questions have a nice property: you can show your work by first expressing what you are trying to achieve in plain English, then writing an unit test, and then coding the solution. The result as you can see is almost 1 to 1 mapping from plain Englis...
These questions are often either (1) high-level system design ("How would you build a Twitter clone?") or (2) trivia ("What is hoisting in Javascript?"). Sometimes the trivia is a lead-in for a "real" question e.g., "How quickly can we sort a list of integers? Good, now ...
Don't write a function that runs in O(n2) if it can pretty easily have an O(n) runtime with the use of hash maps.Candidates are expected to take just around 10-15 minutes for a basic question. If you can tell that you received a basic question, try to finish within the suggested...
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Abstract classes and interfaces are used in java for defining the contract. But, what is the difference between them? When should we use interface over the abstract class and vice versa? It’s a great design question and asked a lot in java interviews. This post provides all the differences...
It's simple—you click on one of three boxes to see what nice thing you've won. You always win something nice. Because we love you. Here's what we have so far. Something's going wrong though. Can you tell what it is? Button 1 Button 2 Button 3 const prizes = ['A Unicorn...
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logical-and-operator-Tricky Question Value of Null pitfall-of-using-typeof What-is-the-value-of-Math.max([2,3,4,5]) not-not-operator-in-javascript why-does-adding-two-decimals-in-javascript-produce-a-wrong-result typeof-NaN If null is a primitive, why does typeof(null) return "objec...
Primary Key:-This key is a column in the table which recognizes each row in the same table uniquely Candidate Key:-This key does not have any repeated attribute Foreign Key:-This key a column in the table to create a relationship with another table. This particular RDBMS Question explains ...
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