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Save the trouble of searching the web for front end interview questions. We have 500+ practice questions in every framework, format, and topic, each with high quality answers and tests from big tech senior / staff engineers.
Questions List
CounterWarm up questionBuild a simple counter that increments whenever a button is clicked
Available frameworks
Make CounterImplement a function that accepts an integer value and returns a function that can be repeatedly called to return increasing values
Languages
MeanImplement a function that finds the mean of the values inside an array
Languages
Function.prototype.callImplement the Function.prototype.call() function that calls the function with a given `this` value and provided arguments
Languages
Min ByImplement a function that finds the minimum element based on the specified criteria
Languages
Selection SortImplement a function that performs a selection sort
Languages
StackImplement a stack data structure containing the common stack methods
Languages
Type UtilitiesImplement utilities to determine primitive variable types in JavaScript
Languages
AccordionBuild an accordion component that a displays a list of vertically stacked sections with each containing a title and content snippet
Meeting CalendarImplement a function to check if all meetings can be attended
Languages
Array Product Excluding CurrentImplement a function to find the product of elements in an array excluding the current element
Languages
Binary SearchImplement a function that performs binary search on an array of numbers
Languages
Breadth-first SearchImplement a breadth-first search algorithm that traverses a directed graph in a breadth-first manner
Languages
Count ByImplement a function that counts the number of times a value appears in an array based on a function or property name
Languages
CurryImplement a function that transforms a function that takes multiple arguments into a function that can be repeatedly called with only one argument at a time
Languages
DebounceImplement a function to limit how many times a function can be executed by delaying the execution of the function until after a specified time after its last execution attempt
Languages
Depth-first SearchImplement a depth-first search algorithm that traverses a directed graph in a depth-first manner
Languages
Heap SortImplement a function that performs a heap sort
Languages
Is the Graph a TreeImplement a function to determine if a graph is a valid tree