Question 1
0 out of 1.85 points
A jQuery selector begins with a $ sign that refers to the jQuery ________________________.
Question 2
1.85 out of 1.85 points
When a JavaScript object is serialized,
Question 3
1.85 out of 1.85 points
The following code displays
var text = "A111-B222-C333";
if (/^\d{4}-\d{4}-\d{4}-\d{4}$/.test(text)) {
    alert("Valid1");
} else if (/^\d{4}-\d{4}-\d{4}$/.test(text)) {
    alert("Valid2");
} else {
    alert("NOT Valid");
}
Question 4
0 out of 1.85 points
In most cases, the best way to find a jQuery plugin that performs a specific task is to
Question 5
0 out of 1.85 points
Binary is a format that uses 1’s and 0’s to represent data, while CSV, XML, and JSON are  ______________________ formats that use letters and symbols to represent data.
Question 6
1.85 out of 1.85 points
To load a web page into a web browser, you can
Question 7
0 out of 1.85 points
Sometimes, validating the HTML code for a web page will help you debug an application, because
Question 8
1.85 out of 1.85 points
One of the benefits of using JSON is that it’s easy to work with when you’re using ______________________.
Question 9
1.85 out of 1.85 points
Which of the following statements about an array of arrays is true?
Question 10
1.85 out of 1.85 points
Which of the following is used in a regular expression pattern to match the beginning of a string?
Question 11
1.85 out of 1.85 points
The six data types allowed in JSON are strings, numbers, Booleans, arrays, objects, and
Question 12
1.85 out of 1.85 points
The following code
var display_error = function(message) {
    alert("Error: " + message);
}
Question 13
1.85 out of 1.85 points
Code example 10-1

var add = function( x, y ) {
    return ( x + y );
}

alert( add (5, 3) );


(Refer to code example 10-1.) The function
Question 14
0 out of 1.85 points
The ________________ are the jQuery UI components that you’re most likely to use.
Question 15
1.85 out of 1.85 points
What text does the following code display in a dialog box?
alert("The file is in \"C:\\My Documents\"");
Question 16
0 out of 1.85 points
What method of the String object searches the string for an occurence of the specified search string?
Question 17
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The jQuery plugins require the use of the ________________ library.
Question 18
1.85 out of 1.85 points
JavaScript code runs on the
Question 19
1.85 out of 1.85 points
Code example 17-2
A plugin that highlights menu items

(function($){
    $.fn.highlightMenu = function(options) {
        var o = $.extend({
            "mouseoverClass"  : "mouseover",
            "mouseoutClass"   : "mouseout",
            "useMouseout"     : true
        }, options);

        return this.each(function() {
            var items = $(this).find("a");
            items.mouseover(function() {
                $(this).addClass(o.mouseoverClass);
                if (o.useMouseout) {
                    $(this).removeClass(o.mouseoutClass);
                }
            });
            items.mouseout(function() {
                $(this).removeClass(o.mouseoverClass);
                if (o.useMouseout) {
                    $(this).addClass(o.mouseoutClass);
                }
            });
        });
    };
})(jQuery);


(Refer to code example 17-2) If this plugin is used with a menu that contains 10 items, how many elements is the plugin function applied to?
Question 20
0 out of 1.85 points
When you test an application with Chrome’s developer tools and a breakpoint is reached, you can click
Question 21
1.85 out of 1.85 points
Which of these for statements displays even numbers from 0 to 10?
Question 22
1.85 out of 1.85 points
Which of the following jQuery methods can you use to set the text of an element?
Question 23
1.85 out of 1.85 points
A function for the ready event method will run any methods that it contains as soon as the _______________________ is ready.
Question 24
1.85 out of 1.85 points
What is the value of random after the following code executes?
var random = Math.floor(Math.random() * 10);
random = random + 1;
Question 25
1.85 out of 1.85 points
The ______________________ method of the JSON object converts a JavaScript object to a JSON string.
Question 26
1.85 out of 1.85 points
What property of the Radio object is used to determine if a radio button is selected?
Question 27
0 out of 1.85 points
If a JavaScript object has a toJSON method, and a replacer function is passed to the stringify method,
Question 28
1.85 out of 1.85 points
What is the value of selected when the following code executes?
var num = "three";
var selected = num && parseFloat(num) || num || "";
Question 29
1.85 out of 1.85 points
Given the following lines of code, what will be displayed in successive dialog boxes?
var answers = [ "C", "B", "D", "A" ];
delete answers[3];
for ( var i = 0; i < answers.length; i++ ) {
    alert(answers[i]);
}
Question 30
1.85 out of 1.85 points
To use a jQuery UI widget, you must code both the ________________ and the jQuery code in the way that’s prescribed for the widget.
Question 31
1.85 out of 1.85 points
After the if statement that follows is executed, what will the value of discountAmount be?
var discountAmount;
var orderTotal = 200;
if (orderTotal > 200) {
    discountAmount = orderTotal * .3;
} else if (orderTotal > 100) {
    discountAmount = orderTotal * .2;
} else {
    discountAmount = orderTotal * .1;
}
Question 32
1.85 out of 1.85 points
What method of the Math object can be used to return the largest value from the values that are passed to it?
Question 33
1.85 out of 1.85 points
Which of the following is a benefit of using the JSON data format?
Question 34
1.85 out of 1.85 points
Code example 11-3

var Employee = function(firstName, lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
};

Employee.prototype.getFullName = function() {
    return this.firstName + " " + this.lastName;
};


(Refer to code example 11-3.) The following code displays
var employee = new Employee("Grace", "Hopper");
employee.lastName = "Murach";
alert (employee.getFullName());
Question 35
1.85 out of 1.85 points
What is the value of the message variable after the following code executes?
var message = "";
for (var i = 0; i < 5; i++ ) {
    message += "L:" + i + ",";
}
Question 36
1.85 out of 1.85 points
When you develop a web page, you should use HTML to provide
Question 37
1.85 out of 1.85 points
After the statements that follow are executed,
var firstName = "Ray", lastName = "Harris";
var fullName = lastName;
fullName += ", ";
fullName += firstName;
Question 38
0 out of 1.85 points
The code that follows has a bug in it because the second use of the variable named salesTax is spelled with all lowercase letters (salestax).
var calculateTax = function(subtotal,taxRate) {
    var salesTax = subtotal * taxRate;
    salestax = parseFloat(salesTax.toFixed(2));
    return salesTax;
}
Assuming that there are no other problems and that you’re using strict mode, what will happen when this code is executed?
Question 39
1.85 out of 1.85 points
Which of the following is a valid statement for declaring and initializing a variable named length to a starting value of 120?
Question 40
0 out of 1.85 points
What does the second statement that follows do?
var numbers = [1, 2, 3, 4];
numbers.length = 0;
Question 41
1.85 out of 1.85 points
What does the following jQuery code do?
$("#image").attr("src", imageURL);
Question 42
1.85 out of 1.85 points
All JSON data types are represented as key/value pairs, with the key name in
Question 43
1.85 out of 1.85 points
Code example 4-1

var add = function( x, y ) {
    return ( x + y );
}
alert( add (5, 3) );


(Refer to code example 4-1) The alert method in this example
Question 44
1.85 out of 1.85 points
If a numerical operation returns a number greater than the largest possible JavaScript value, it returns
Question 45
1.85 out of 1.85 points
Code example 16-2

var employee = {
    name: "G. Hopper",
    start: new Date("1/1/2000"),
    salary: 90000
};
var regions = ["northwest", "southwest", "central", "east"];


var replacer = function (key, value) {
    if (key === "") { return value; }
    if (key === "salary") { return undefined; }
    if (typeof value === "string") {
        var first = value.substring(0,1).toUpperCase();
        var remaining = value.substring(1);
        return first + remaining;
    } else { return value; }
};


(Refer to code example 16-2) What JSON string does the following code produce?
JSON.stringify(employee, replacer);
Question 46
1.85 out of 1.85 points
To call a jQuery method, you code a _____________________ that represents one or more elements, the dot operator, and the method name.
Question 47
1.85 out of 1.85 points
Given a Date object named due_date, which of the following statements sets the month to February?
Question 48
0 out of 1.85 points
What does the code that follows do?
$("email").firstChild.nodeValue = "Entry is invalid.";
Question 49
1.85 out of 1.85 points
Which method returns the elements of an array in a string separated by a comma?
Question 50
0 out of 1.85 points
Which of the following is NOT one of the three testing phases of a JavaScript application?
Question 51
1.85 out of 1.85 points
Which method of a regular expression searches a string and returns true if the pattern is found?
Question 52
1.85 out of 1.85 points
What happens when an exception is thrown inside a try block?
Question 53
0 out of 1.85 points
Which property of an Error object stores the type of error?
Question 54
1.85 out of 1.85 points
Code example 16-1

var json = "[{\"task\":\"Do taxes\",\"due\":\"2016-04-15T07:00:00.000Z\"}";
json = json + ",{\"task\":\"Do Laundry\"}]";
var tasks = JSON.parse(json);


(Refer to code example 16-1) What JavaScript does this code produce?
Question 55
1.85 out of 1.85 points
What is displayed when the following code executes?
var age = 19, score = 750;
if ( age >= 21 && score >= 700 ) {
    alert ("Loan approved");
} else if ( age >= 21 && score >= 650 ) {
    alert ("Cosigner needed.");
} else if ( age >= 18 && score >= 680 ) {
    alert ("Two cosigners needed.");
} else {
    alert ("Loan denied.");
}
Question 56
1.85 out of 1.85 points
Which of the strings matches the following pattern?
/^[01]?\d\/[0-3]\d\/\d{4}$/
Question 57
1.85 out of 1.85 points
Which of the following causes the parse method to throw an exception?
Question 58
0 out of 1.85 points
The jQuery functions will work in all browsers because they are coded and tested for _________________________ compatibility.
Question 59
1.85 out of 1.85 points
After the statement that follows is executed, rateText represents
var rateText = document.getElementById("rate");
Question 60
1.85 out of 1.85 points
All parameters passed to a function are available in what property of the function?
Question 61
1.85 out of 1.85 points
What does the match method of a String object return if the global flag is set and a match is found?
Question 62
1.85 out of 1.85 points
If you download the jQuery core library, you can include it in a web page by coding a ____________________ element.
Question 63
0 out of 1.85 points
If you’re using the Chrome browser and a JavaScript application stops running due to an error in the JavaScript code, you can identify the statement that caused the error by
Question 64
1.85 out of 1.85 points
What does the following jQuery code do?
$("h2").prev();
Question 65
1.85 out of 1.85 points
Code example 10-1

var add = function( x, y ) {
    return ( x + y );
}

alert( add (5, 3) );


(Refer to code example 10-1.) This code
Question 66
1.85 out of 1.85 points
When a function’s this keyword is undefined, how was the function invoked?
Question 67
1.85 out of 1.85 points
How can you clear a check from a Checkbox object?
Question 68
1.85 out of 1.85 points
What can you use to clarify the order of relational and logical operations in a conditional expression?
Question 69
1.85 out of 1.85 points
When a data structure is ______________________, it’s converted to a format that can be transmitted and stored.
Question 70
1.85 out of 1.85 points
A coding error that produces the wrong results when the application is run is known as a
Question 71
1.85 out of 1.85 points
For the following code, an event handler named investment_change is
var investment_change = function() {
    var years = parseInt( $("years").value );
    alert("Years: " + years);
}

window.onload = function() {
    $("investment").onchange = investment_change;
}
Question 72
1.85 out of 1.85 points
Three of the common CSS selectors select