Interview Faqs & Ans: JavaScript
what is javascript ?
write a simple program in javascript ?
try to call a function of the javascript by clicking on a button in the browser
name the entity which is used to interact with the browser ?
name the entity which is used to interact with the browser ?
is the window object an object of javascript ?
explain the usage of the function confirm ?
explain the usage of the function prompt ?
explain the usage of the function open() ?
is it possible to navigate the history of urls visited by the user ?
Please check if the below is a valid pgm ?
can the document.write() function directly use the return value of a function as
explain the concept of dynamic type language ?
Validate the given statements ?
do we really have '==' operator in javascript ?
is it possible to create the html form in the run time ?
in javascript, is the object created with out creating the class ?
do we really require a constructor to create an array in javascript ?
what is the diff in the output of 81 + 82 + "85" and "81" + 82 + 85 ?
explain the client side javascript and server side javascript ?
if a variable is undefined, do we have a null value in it ?
list the pop boxes of javascript ?
can we use the navigator.appVersion string to detect the version of the app we a
can i use document.body.bgColor="yellow" to change the background color ?
what is "undefined" and "not defined" ?
what is the output of the code ?
does creating private methods a memory efficient solution ?
explain the concept of closure ?
define the function add() which is called in the code given ?
how can we empty the array ?
does the delete operator affects the global/local variable of type number ?
does the delete operator deletes the property of an object ?
does the delete operator delete the prototype property ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
explain the given code statements ?
what is the output of the given code ?
what is the sideeffect of typeof var1 === "object" ?
what is the output of the given code ?
what is the output of the given code ?
why should i be putting the entire content of a javascript source file in a func
what is "use strict" ?
what is the output of the given code ?
what is Nan ?
what is the output of the given code ?
what is the output of the given code ?
write the function which finds out whether a string is a palindrome or not ?
Implement the mul function called given ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
what is the output of the given code ?
explain the two ways of event propogation ?
how can we close the current window in java script ?
explain the concepts of let and var
explain the concept of delegation model ?
explain the concept of negative infinity ?
state whether the given statements are true/false ?
Interview Faqs & Ans: NodeJS
explain nodejs
who introduced Node.js and does the software costs us to use it ?
does nodejs support event looping ?
why do we need nodejs ?
explain the api functions in nodejs ?
what is that which is used to pass errors and data in nodejs ?
what is meant by non-blocking apis ?
what are the different options we can use to avoid having callback funtions ?
what is that code segment which always run in between several asynchronous funct
list functions which can be done in a non-blocking way using the event loop ?
what are the different tools used to catch common errors during static analysis
what is the output of the given code ?
how child threads are handled in nodejs ?
how unhandled exceptions are caught by nodejs ?
when executed, does node.js really take advantage of multiple core resources in
is the first argument passed to a callback handler really a optional error objec
explain promises ?
what is the name of the function which checks whether the variable value is a nu
what is the problem with the given code snippet ?
what is the difference between Node.js and Ajax ?
explain chaining in nodejs ?
explain streams in nodejs ?
explain exit codes in nodejs ?
explain globals in nodejs ?
is consistent style really important in nodejs ?
is there a difference between angularjs and nodejs ?
while dealing with variables what is the difference of using var and not using v
in REPL, what is the use of underscore variable ?
what is the difference between global installation of dependencies and local ins
why are we executing the given command ?
what is package json ?
how do you uninstall a dependency using npm ?
what is blocking code and what is used to prevent it ?
explain event loop ?
explain even emitter ?
explain buffer class ?
how do you connect output of one stream to another stream ?
why do we need var fs=require("fs")
what is the purpose of the given flags in read/write operation on files ?
are there any event fired by streams ?
explain fs.open() call ?
explain fs.read() call ?
explain fs.writeFile() call ?
explain the calls fs.close(), fs.stat(), fs.ftruncate(), fs.unlink(), fs.mkdir()
explain __filename and __dirname ?
explain settimeout(),cleartimeout(), setinterval() ?
explain console object/process object() ?
Interview Faqs & Ans: ReactJS
what is reactjs and what are the advantages of reactjs ?
explain the concepts of components ?
explain jsx ?
does each component in reactjs has lifecycle methods ?
how can we use events in Reactjs ?
explain flux ?
explain refs ?
explain stateless components ?
is there a difference between dom and virtual dom ?
what are the disadvantages of reactjs ?
controlled vs uncontrolled components ?
functional components vs class components ?
explain higher order components ?
is Reactjs different from Angularjs ?
explain arrow function ?
explain render function ?
explain component lifecycle methods in detail ?
explain different phases of react component's life cycle ?
explain in detail the difference between real and virtual dom ?
explain in detail the difference between react and angular ?
can browsers read jsx ?
explain props ?
explain states ?
states vs props ?
explain synthetic events in react ?
controlled vs uncontrolled components ?
explain pure components ?
explain the importance of keys in React ?
list the issues with mvc framework ?
explain Redux ?
explain the importance of Reducer ?
explain the importance of store ?
redux vs flux ?
list advantages of redux ?
explain react router ?
conventional routing vs react routing ?
what is the importance of switch keyword used in react router v4 ?
ES5 vs ES6 ?
explain virtual dom ?
explain java script tool chain ?
what are will's, did's, should's ?
explain the importance of keys with an example ?
setState() vs forceUpdate()
explain pure functional components ?
shouldComponentUpdate causes a component to render only when it's ID changes - t
Interview Faqs & Ans: AngularJS
what is angularjs ?
explain data binding in angularjs?
explain scope in angularjs ?
explain controllers in angularjs ?
explain services in angularjs ?
explain filters in angularjs ?
explain directives in angularjs ?
explain templates in angularjs ?
explain routing in angularjs ?
explain deep linking in angularjs ?
what are the advantages/disadvantages of angularjs ?
what are the core directives of angularjs ?
explain angularjs boot process ?
explain mvc ?
explain ng-app directive ?
explain ng-bind directive ?
explain ng-controller directive ?
explain how the angularjs integrates with html ?
Question 19
explain ng-init directive ?
explain ng-repeat directive ?
explain angularJS expressions ?
explain uppercase/lowercase filters ?
explain currency filter ?
explain filter filters ?
explain orderby filter ?
explain ng-disabled, ng-show, ng-hide, ng-click directive ?
explain angular module ?
how to validate data in Angular js ?
explain the ng-include directive ?
how to make a Ajax call using Angular JS ?
explain the use of $routeProvider service ?
explain rootScope ?
explain service in Angularjs ?
what is service method and factory method ?
list core components which can be injected into each others as dependencies ?
explain extensibility of Angular JS ?
list the type of components on which we can create custom directives ?
explain internationalization ?
explain the basic steps to unit test an Angular JS filter ?
how can we keep track on the maximum number of concurrent watches ?
can we share data between controllers ?
explain ng-show/ng-hide and ng-if directives ?
explain digest cycle ?
can we use AngularJS together with jQuery ?
what is the use of :: ?
what is the difference between one way binding vs two way binding ?
explain functionality of $scope.$apply() ?
explain angular.copy() ?
explain the given code ?
list some of the inbuilt servies in angularjs ?
how can i define the way my directive will be used ?
what can i use an attribute or an element ?
explain singleton pattern ?
explain interceptor ?
Try the below pgms:
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6