Post Quiz 1 Question Review

You cannot use words that JavaScript has reserved for other purposes when you create a variable name.

True

The ____ statement halts the processing of the web page and displays an error if an include file cannot be found. a. include c. Insert-contents b. insert d. require

require

12. The primary use of the include and require statements is to reuse content on multiple web pages by allowing you to insert the content of an external file, called an include file, in your PHP scripts.

True

A function definition contains the lines of code that make up a function

True

____ is essentially junk e-mail. a. Spam c. Server-side b. Client-side d. An e-mail harvester

a) Spam

Where you place a function in the HTML file is unimportant.

False

The ____ symbol is used to suppress any errors that might be generated by an expression to which it is prepended. a. # c. @ b. =>

@

. ____ are lines you place in your code that do not get executed but provide helpful information such as the name of the script, your name and the date your created the program. a. Pointers c. Comments b. Instructions

Comments

10. $2_ABC1 is a valid variable identifier

False

A function cannot be designed to return a value.

False

A function executes automatically

False

A function must contain a parameter

False

Essentially, Java and JavaScript are the same.

False

Function parameters must be placed within parentheses, following the function name, and the parameters must be separated by periods.

False

In PHP, each statement must be placed on a separate line.

False

Parameter values cannot be variables themselves.

False

. ___ a variable is the processing of assigning a first value to a variable. a. Initializing c. Finalizing b. Declaring

Initializing

.____ are positive and negative numbers and 0 with no decimal places. a. Integers c. Digits b. Numbers

Integers

To refer to a particular location or element in the array, we specify the name of the array and the ________ of the particular element in the array. a) contents b) size c) position number d) type

c) position number

____-side programs do not require users to wait for data to be sent over the Internet to a Web a. Server c. Client b. File d. Database

c. Client

Data types that can be assigned only a single value are called ____ types. a. individual c. primitive b. mono

primitive

The ____ operation uses the === (triple equal sign) to compare two operands for equality and data type. a. equal c. comparison b. strict equal

strict equal

In a ____ programming language the data type for a variable will not change after it has been declared. a. loosely typed c. constantly typed b. strongly typed

strongly typed

The PHP Group recommends you use the standard ____ script delimiters to write PHP code declaration blocks. a. ? statements ? b. ?php statements ? c. script language = "php">statements/script

?php statements ?>

In PHP, you are limited to ten (10) code blocks in a single page.

False

In PHP, you can declare a variable without assigning a value to it.

False

In client-side programming, programs that run on the client side directly change the server data.

False

It is a good practice to name all Web files with a .php extension even if they contain no PHP code.

False

Most JavaScript commands and names are not case sensitive.

False

The source code for PHP can be viewed in the client browser.

False

Users need to work with a developer's kit to compile a JavaScript program.

False

When using the (script) element, a value of "php" must be assigned to the type attribute

False

A function must return a value

True

A text string can be contained in either double or single quotation marks

True

All Web pages containing PHP code must have an extension of .php

True

Early on, a problem with Java was that nonprogrammers found it difficult to learn and use to write their own Java applets

True

If a command block is missing either the opening or closing brace, an error occurs

True

If a function returns a value, it can be stored in a variable.

True

If you use a variable name in a text string enclosed by single quotation marks, the name of the variable will display

True

In Java, programs cannot write content to the hard disk.

True

In PHP, you must declare a global variable with the global keyword inside a function definition for the variable to be available within the scope of that function

True

It is common practice for JavaScript programmers to create libraries of functions located in external files that are easily accessible to many Web pages.

True

JavaScript code can be inserted directly into an HTML file, or placed in a separate text file that is linked to the Web page.

True

JavaScript commands can be inserted directly into an HTML file rather than being placed in a separate program file.

True

Like variables, function names are case sensitive.

True

Some JavaScript functions require parameters, which are variables associated with the function.

True

Spam reduces productivity by forcing employees to wade through numerous spam messages every day to find messages that are truly relevant.

True

The default label contains statements that execute when the value returned by the switch statement expression does not match any case label.

True

The do...while statement executes a statement or statements once, then repeats the execution as long as a given conditional expression evaluates to TRUE.

True

The document.write() and document.writeln() methods reflect the object-oriented nature of the JavaScript language.

True

The else clause can only be used with an if statement

True

The great advantage of a function is that you can reuse it.

True

The switch statement controls program flow by executing a specific set of statements, depending on the value of an expression.

True

Using the standard method of writing PHP blocks, the <?php and ?> are used to begin and end a code block.

True

When the browser loads the HTML file containing a function, the browser bypasses the function without executing it; the function is executed only when called by another JavaScript command.`

True

When using multiple arguments in a function, you must separate the arguments with a comma

True

What is the result of writing the keyword var in a function parameter list? a) The result would be a JavaScript runtime error. b) The parameter following the keyword would have global scope. c) The parameter following the keyword would have local scope. d) The parameter following the keyword would become a static variable.

a) The result would be a JavaScript runtime error.

What would the browser display if the following code were executed in a script? var product = 0; while ( product <= 25 ); product = 2 + product; a) nothing, the script would result in an inifite-loop error b) 0 c) 25 d) 26

a) nothing, the script would result in an inifite-loop error

Which of the following is not a DOM collection? a) roots b) anchors c) links d) forms

a) roots

Which of the following is a legal function call for the function definition provided below? function square( y ) { return y * y; } a) square(7+2); b) (7).square; c) square(7,2); d) square 7;

a) square(7+2);

____ is an interpreted language, meaning that the program code is executed directly without compiling. a. JavaScript c. C++ b. Java d. All of the above

a. JavaScript

_________ code can be inserted directly into an HTML file or placed in a separate text file that is linked to a Web page. a. JavaScript c. JScript b. Java d. Java Applets

a. JavaScript

The print_r(), var_export(), and var_dump()functions are used with ____ to display the index and value of each element. a. variables c. arrays b. functions

arrays

What would the browser display if the following code were executed in a script? var product = 0; while (product >= 25) product = 2 + product; document.writeln( product ); a) nothing, the script would result in an error b) 0 c) 24 d) 26

b) 0

A(n) ____ is a person who sends out unsolicited e-mails. a. Analyst c. harvester b. Spammer d. staffer

b) Spammer

What does the following statement do? Math.floor( Math.random() * 12 ); a) This creates a random number from 0 up to and including 12. b) This creates a random number from 0 up to but not including 12. c) This creates a random number from 1 up to and including 12. d) This creates a random number from 1 up to but not including 12.

b) This creates a random number from 0 up to but not including 12.

The style of programming in which the user interacts with a GUI component is called ________ programming. a) object-oriented b) automatic c) event-driven d) modular

b) event-driven

Java requires that users have access to the ____ in order to create an executable Java applet. a. DTD c. ECMA b. JDK d. DDL

b. JDK

A(n) ____ retrieves a Web page from the server. a. programmer b. server-side program c. User d. information set

b. server-side program

____ can be used to look for e-mail addresses by scanning Web pages. a. Spam c. An e-mail harvester b. Server-side d.Client-side

c) An e-mail harvester

An object's methods are accessed by writing the name of the object immediately followed by a ____________. a) method name b) method index c) dot d) property operator

c) dot

One way to ensure that a variable is of the correct data type is through type ____. a. naming c. casting b. identifying

casting

The ____ operator executes one of two expressions based on the results of a conditional expression. a. conditional c. comparison b. expressional

conditional

You use the ____ function to find the total number of elements in an array. a. sum() c. count() b. counta()

count()

A ____ is a variable that increments or decrements with each iteration of a loop statement a. counter c. iterator b. incrementer/decrementer d. repetitor

counter

What would the function cube return, assuming it is called with the statement cube( 3 )? function cube( y ); { return y * y * y; } a) JavaScript runtime error b) 3 c) 9 d) 27

d) 27

You can ____ an e-mail address to prevent it from being grabbed by programs that scan Web pages. a. inherit c. Spam b. compile d. scramble

d) scramble

____ is the process by which a program is converted from a text file of code into an executable file called an applet. a. Inheritance b. ECMA c. Scripting d. Compiling

d. Compiling

Which of the following does not have features to scramble or unscramble e-mail addresses? a. HTML c. XML b. XHTML d. both a and b

d. both a and b

The ____ function is used to create a constant a. create() c. describe() b. define()

define()

2. What will be returned if you use a local variable outside the function in which it is declared? a. value c. function b. error message d. nothing

error message

The ____ file is typically saved with a prefix of inc_. a. insert c. nested b. include d. increment

include

A(n) ____ is an element's numeric position within an array. a. location c. indicator b. index

index

If you do not include code that changes the value used the by the condition expression, your program will be caught in a ____ loop. a. continuous c. constant b. continuing d. infinite

infinite

The ____ function tests whether a variable contains a numeric data type. a. is_number() c. is_numeric() b. is_digit()

is_numeric()

A variable's scope can be either global or ____. a. local c. universal b. undeclared d. declared

local

The ____ operator uses the % symbol to find the remainder of integer division. a. division c. arithmetic b. modulus

modulus

When one decision-making statement is contained within another decision-making statement it is referred to as a ____ decision-making structure. a. enclosed c. nested b. contained d. layered

nested

Exponential ____ is a shortened format for writing very large numbers with any decimal places. a. numbering c. registering b. notation

notation

Assignment operators are used to assign a ____ to a variable. a. name c. data type b. value

value