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WGU D280A - ITSW 3151 JavaScript Programming - Comprehensive FA Guide 2024. $13.49   Add to cart
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WGU D280A - ITSW 3151 JavaScript Programming - Comprehensive FA Guide 2024.
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vWGU D280A - ITSW 3151 JavaScript Programming - Comprehensive FA Guide 2024.WGU D280A - ITSW 3151 JavaScript Programming - Comprehensive FA Guide 2024.WGU D280A - ITSW 3151 JavaScript Programming - Comprehensive FA Guide 2024.

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  • July 23, 2024
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D280A ITSW 3151 JavaScript Programming COMPREHENSIVE FA GUIDE 2024 1. Which of the following methods will concatenate arrays without altering the original arrays? - A. `Array.prototype.push()` - B. `Array.prototype.concat()` - C. `Array.prototype.splice()` - D. `Array.prototype.unshift()` Answer : B. Array.prototype.concat() Rationale: `concat()` method returns a new array, combining el ements from the original arrays without modifying them. 2. What is the output of the following code snippet? ```javascript const obj = { a: 1, b: 2, c: 3 }; const { a, ...rest } = obj; console.log(rest); ``` - A. `{ b: 2, c: 3 }` - B. `{ a: 1, b: 2 }` - C. `{ c: 3 }` - D. `undefined` Answer : A. { b: 2, c: 3 } Rationale: Using the rest operator (`...rest`), the code collects the remaining properties into a new object `rest` after destructuring `a`. 3. In JavaScript, which call is made as soon as a Promise object is created? - A. `Promise.prototype.then()` - B. `Promise.prototype.catch()` - C. `Promise.prototype.finally()` - D. The executor function passed to the `Promise` constructor Answer : D. The executor function passed to the Promise constructor Rationale: When a Promise is created, the executor function is immediately executed. 4. Which array method is used to iterate over all elements of an array and returns a sing le accumulated result? - A. `Array.prototype.filter()` - B. `Array.prototype.forEach()` - C. `Array.prototype.reduce()` - D. `Array.prototype.map()`

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