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Front End Web Development Lead Interview Questions

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481 front end web development lead interview questions shared by candidates

1. video call - implement sum(2)(3)(4) , sum(2,3,4) ------------------------------------------------ - var myObject = { foo: "bar", func: function() { var self = this; console.log("outer func: this.foo = " + this.foo); console.log("outer func: self.foo = " + self.foo); (function() { console.log("inner func: this.foo = " + this.foo); console.log("inner func: self.foo = " + self.foo); }()); } }; myObject.func(); ----------------------------------------------------- -What will the code below output? Explain your answer. console.log(0.1 + 0.2); console.log(0.1 + 0.2 == 0.3); 2. DS Algo round: - given a dictonary of words, we need to write a function that performs search on it. - Implment binary search in sorted array. follow up if the array is rotated - Distribute candies problem from leetcode. - Question on 2D Array 3. UI techh round: Outputs of the following questions: - var arr=[1,2,3,4,5] console.log(i); for(var i=0; I<arr.length; I++){ setTimeout[()=>{ console.log(i); }, 100-20*I); } console.log(I—); setTimeout[()=>{ console.log(—i); }); ------------------------------------------------- - (function(){ var a = b = 3; })(); console.log("a defined? " + (typeof a !== 'undefined')); console.log("b defined? " + (typeof b !== 'undefined')); ------------------------------------------------------------------ -var x = 21; var girl = function () { console.log(x); var x = 20; }; girl (); -------------------------------------------- - difference between var and let. - event loop 4.System Design: -implement Pipeline chaining -Implement subscription on DOM -Implement two way data Binding. -Angular concepts.
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Front End Web Developer

Interviewed at Disney+ Hotstar

3.5★
Jun 21, 2019

1. video call - implement sum(2)(3)(4) , sum(2,3,4) ------------------------------------------------ - var myObject = { foo: "bar", func: function() { var self = this; console.log("outer func: this.foo = " + this.foo); console.log("outer func: self.foo = " + self.foo); (function() { console.log("inner func: this.foo = " + this.foo); console.log("inner func: self.foo = " + self.foo); }()); } }; myObject.func(); ----------------------------------------------------- -What will the code below output? Explain your answer. console.log(0.1 + 0.2); console.log(0.1 + 0.2 == 0.3); 2. DS Algo round: - given a dictonary of words, we need to write a function that performs search on it. - Implment binary search in sorted array. follow up if the array is rotated - Distribute candies problem from leetcode. - Question on 2D Array 3. UI techh round: Outputs of the following questions: - var arr=[1,2,3,4,5] console.log(i); for(var i=0; I<arr.length; I++){ setTimeout[()=>{ console.log(i); }, 100-20*I); } console.log(I—); setTimeout[()=>{ console.log(—i); }); ------------------------------------------------- - (function(){ var a = b = 3; })(); console.log("a defined? " + (typeof a !== 'undefined')); console.log("b defined? " + (typeof b !== 'undefined')); ------------------------------------------------------------------ -var x = 21; var girl = function () { console.log(x); var x = 20; }; girl (); -------------------------------------------- - difference between var and let. - event loop 4.System Design: -implement Pipeline chaining -Implement subscription on DOM -Implement two way data Binding. -Angular concepts.

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