JavaScript array coding interview questions are technical questions asked to gauge candidates’ ability to work with arrays along with their familiarity with fundamental data structures.1. Write a function that returns the sum of all numbers in an array.By...
Advanced Javascript Interview Questions 32. What are Spread Operators in JavaScript? Spread Operators (. . .) in JavaScript are used to “spread” the elements of an array or in JavaScript. By using Spread Operators we can copy output array/object values, merge them, pass these values to a...
答案是第二种情况(打印出queueMicroTask更好),因为来自queueMicroTask的任务在调用栈为空之后且在调用事件循环之前被调用,对于setTimeout而言,任务是eventQeue的一部分。 2、控制台输出是什么? 答案是输出为10,因为将对象传递给函数时的对象相似,仅传递其值,而不...
That brings us to another reason these javascript test questions have become so popular. They bring speed and efficiency to the hiring process. This is beneficial for both you as the applicant and the hirer. By eliminating endless laborious technical interviews and reviews, companies can drastically...
Adding more questions to your JavaScript quiz is a simple process. You need to add more objects to the questions array in your JavaScript code. Each object represents a question and has two properties: text (the question itself) and responses (an array of possible answers). Here’s an ...
parse(jsonArray) // { name: 'Lydia' } 111. 输出什么? let name = 'Lydia' function getName() { console.log(name) let name = 'Sarah' } getName() A: Lydia B: Sarah C: undefined D: ReferenceError 答案 答案:D 每个函数都有其自己的执行上下文。getName函数首先在其自身的上下文(范围)内...
B: "array" C: "object" D: "NaN" 答案: C 扩展运算符(...args)会返回实参组成的数组。而数组是对象,因此 typeof args 返回"object"。 20. 输出是什么? function getAge() { 'use strict' age = 21 console.log(age) } getAge() A: 21 B: undefined C: ReferenceError D: TypeError 答案:...
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23.What are the mutable and immutable array's methods? 24.What does array-like mean? 25.What is the difference between for...of and for...in loop? 26.What are asynchronous operations? 27.What are async and await? 28.What is JSON and what are its common operations?
在JavaScript 中,我们已经可以使用 Array find() 方法在数组中查找通过指定测试条件的元素。同样,我们可以使用 findIndex() 来查找此类元素的索引。虽然 find() 和 findIndex() 都从数组的第一个元素开始搜索,但在某些情况下,最好从最后一个元素开始搜索。 在某些情况下,我们知道从最后一个元素中查找可能会获得更...