Pearson Practice Test INF-302: Information Technology Specialist JavaScript

The INF-302 JavaScript practice test contains 138 questions and covers the following objectives: 

JavaScript Operators, Methods, and Keywords – 29 questions  

Complete and debug code that uses assignment and arithmetic operators  

• Assignment, increment, decrement, addition, subtraction, division, multiplication, modulus, compound assignment operators (+=, -=, *=, /=, %=)  

Apply JavaScript best practices  

• Comments, indentation, naming conventions, noscript, constants, reserved keywords, debugger keyword, setting breakpoints, console.log  

Evaluate the use of internal and external scripts  

• When to use, how to use, and what happens when scripts are used at multiple levels  

Implement exception handling  

• try, catch, finally  

Complete and debug code that interacts with the Browser Object Model (BOM)  

• Displaying dialogs, determining screen size  

Variables, Data Types, and Functions – 32 questions  

Declare and use variables of primitive data types  

• Number, Boolean, String, null, undefined, type of operator, type-checking functions, use strict, converting between data types (parseInt, parseFloat), formatting numbers, string operations, eval(), toFixed(), toLocaleString(), toPrecision(), single quote vs. double quote (nesting), initialization  

Declare and use arrays  

• Single-dimensional arrays; multi-dimensional arrays; iteration; initialization; defining, sorting, and searching an array; push, pop, shift, and unshift methods; length property; accessing an array element  

Complete and debug code that uses objects  

• Properties, methods, instantiation, Date object, retrieving date and time parts, localizing date format (MM/DD vs DD/MM), adding and subtracting dates  

Complete and debug code that uses built-in Math functions  

• random, round, abs, floor, ceil, min, max, pow, sqrt  

Complete and debug functions that accept parameters and return values  

• Reusable code, local vs. global scope, redefining variables, passing parameters, value vs. reference, return values  

Decisions and Loops – 20 questions  

Evaluate expressions that use logical and comparison operators  

• !=, <, >, <=, >=, !, ==, &&, ||  

Complete and debug decision statements  

• Single alternative (if), dual alternative (if else), multiple alternative (switch), nested if  

Complete and debug loops  

• for, for in, while, do while, break, continue  

Document Object Model – 32 questions  

Identify and construct the Document Object Model (DOM) tree  

• window, document, body, other HTML elements  

Identify and handle document, form, keyboard, and mouse events  

• onload, onfocus, onblur, onchange, onkeydown, onkeyup, onkeypress, onclick, onmouseover, onmouseout  

Complete and debug code that outputs to an HTML document  

• document.write, innerHTML, textContent  

Complete and debug code that locates, modifies, and adds HTML elements and attributes to documents  

• getElementByld, getElementsByTagName, getElementsByClassName, setAttribute, createElement  

Create events using event handlers and listeners  

• DOM events, HTML attribute event, addEventListener  

HTML Forms – 25 questions  

Complete and debug code that retrieves form input and sets form field values  

• Retrieving form values; identifying the DOM path; getting values from different types of elements; prepopulating, masking, and updating values  

Complete and debug code that performs input validation  

• Case, string comparisons, Not-A-Number (NaN), not blank  

Describe the form submission process  

• onsubmit, POST vs. GET, potential targets for submission