What is the value of $m after this runs? $x = 0; $m = $x++; 0 1 2 2 points QUEST

Q: What is the value of $m after this runs? $x = 0; $m = $x++; 0 1 2 2 points QUEST

1) 2 2)false 3)ok too much 4) 20 5) assign $m the value 3 6) none 7)true 8) true 9) if($n>100 or $n

ID: 3887756 • Letter: W

Question

What is the value of $m after this runs?

$x = 0;
$m = $x++;

2 points

QUESTION 2

true || false = false

True

False

2 points

QUESTION 3

What's the output of this code segment?

$cost = 102;

if ($cost > 0 and $cost < 100)
echo "too much";
if ($cost <= 0 or $cost >= 100)
echo "OK";

too much

too much OK

OK too much

2 points

QUESTION 4

What is the output for y?

$y = 0;

for($i=0; $i < 8; $i += 2)
$y += $i;

echo($y);

2 points

QUESTION 5

What does this code do?

$pi = 3.14;
$m = strval($pi);

assigns $m the Boolean value true

assigns $m the value 3"

assigns $m the Boolean value false

assigns $m value "3.14"

2 points

QUESTION 6

A compound data type is a data type that _____.

none of the above

can hold more than one value

can only be used in a function

can be used anywhere in the program except a function

2 points

QUESTION 7

The value property of an HTML text box is whatever the user types in that text box.

True

False

2 points

QUESTION 8

&& is evaluated before ||.

True

False

2 points

QUESTION 9

Which of the following expressions evaluates as true for $n less than 0 or more than 100 (exclusive)?

if ($n > 100 or $n < 0)

if ($n <= 100 or $n >= 0)

if ($n < 100 and $n > 0)

2 points

QUESTION 10

"With switch blocks, if you don't include a break statement then execution continues within in the switch block until the next break statement or the end of the block."

True

False

2 points

QUESTION 11

What should you say about this code?

$sum = 0;

for($d = 0; $d < 4; $d = $d + 0.5)
$sum += 1;

sum = 9

sum = 5

it is not a good idea to use

sum = 4

2 points

QUESTION 12

What does this code do?

$x = 4;
echo is_float($x);

"sends ""integer"" to the user's browser"

sends the Boolean value true to the user's browser

"sends ""float"" to the user's browser"

sends the Boolean value false to the user's browser

2 points

QUESTION 13

The first character after the dollar sign in a variable name must be _____ or _____. Choose 2 answers.

an underscore

another dollar sign

a letter of the alphabet

2 points

QUESTION 14

"if used in an assignment, $m++ adds 1 to $m then returns the result."

True

False

2 points

QUESTION 15

"How many times will the following code echo "PHP"?

$count = 2;

while($count < 10) {
echo "PHP ";
$count += 1;
}

2 points

QUESTION 16

"If two conditions are ANDed together, and the first condition is false, the second condition is not even tested."

True

False

2 points

QUESTION 17

"In the following, because there is only a single line associated with the if-statement, you don't need to enclose the echo statement in curly braces, but it is considered to be a good thing to do anyway. if($x != 0) echo ""Not a zero."";"

True

False

2 points

QUESTION 18

"How many times will the following code echo "Welcome to PHP"?

$count = 0;

while ($count < 10)
echo "Welcome to PHP";

an infinite number of times

2 points

QUESTION 19

Both the print and the echo command send http to the users browser.

True

False

2 points

QUESTION 20

What does this code do?

define("tax", .06);

"normally it defines a constant, but only if the variable name begins with a $"

it defines a named constant called tax

it initialized the variable 'tax'

it allows the use of .06 in a program

2 points

QUESTION 21

What is the value of $m after this runs?

$x = 0;
$m = ++$x;

2 points

QUESTION 22

With a switch statement the structure is set up to compare the variable value or expression in the parentheses of switch(expr) to a case label. If there is a match the code for that case is executed.

True

False

2 points

QUESTION 23

What does this code do?

$x = 6 / 2.0;
echo gettype($x);

"sends ""3"" to the user's browser"

"sends ""integer"" to the user's browser"

"sends ""boolean"" to the user's browser"

none of the other answers are true

2 points

QUESTION 24

Assume an HTML form is submitted to your page. What is the significance of the word $_POST in this code?

$name = $_POST["full_name"];

$_POST must be the the name attribute of the HTML form element that was submitted to the PHP page.

$_POST is used when the method of the HTML form that was submitted as given as post.

"$_POST is just a place holder, and its actual name can be anything."

none of the above.

2 points

QUESTION 25

Which of the following are logical operators? Choose all that apply.

xor

2 points

QUESTION 26

"What is the output of this code?

$a = 51;
if ($a <= 14)
    echo "apples";
else if ($a > 14 and $a <= 20)
    echo "oranges";
else if ($a > 20 or $a < 30)
    echo "grapes";
else if ($a >= 30 and $a <= 50)
    echo "peaches";
else
    echo "bananas";

grapes

apples

peaches

oranges

2 points

QUESTION 27

What is the output of the following code?

$x = 10;
while ($x < 5)
$x = $x + 1;

echo $x

2 points

QUESTION 28

The _____ attribute of a HTML form determines whether the GET or the POST request is used.

action

size

method

name

2 points

QUESTION 29

Which of the following is equivalent to 44 >= $r >= 12?

if ($r >= 12 or $r <= 44)

if ($r <= 44 and $r <= 12)

if ($r <= 44 and $r >= 12)

if ($r >= 12 or $r >= 44)

2 points

QUESTION 30

How many times is the echo statement executed?

for($i=0; $i < 3; $i++)
for($j=0; $j < 4; $j++)
echo "PHP ";

100

2 points

QUESTION 31

Assume $r= 6 and $s= 0. Which of the following evaluate to true? Choose all correct answers.

$r || $s == 1

not $r || $s == 1

$r && $s == 0

2 points

QUESTION 32

What is the output for $y?

$y = 0;
for($i=1; $i < 7; $i++)
$y += $i;

echo $y;

2 points

QUESTION 33

"What does this code do?

$x = 8;
$z= settype($x, "float");

assigns $z the Boolean value false

assigns $z the value 8

assigns $z the value 8.0

assigns $z the Boolean value true

2 points

QUESTION 34

"if used in an assignment, ++$m adds 1 to $m then returns the result."

True

False

2 points

QUESTION 35

What will be displayed when the following code is executed?

$number = 6;

while ($number > 0) {
$number -= 3;
echo "$number ";
}

6 3

3 0 -3

6 3 0

3 0

2 points

QUESTION 36

"In a page containing both PHP and HTML, the PHP code does not need to be distinguished from HTML code."

True

False

2 points

QUESTION 37

Any arithmetic operations written in parenthesis will happen before multiplication

True

False

2 points

QUESTION 38

What is the output?

$answer = 2;
switch($answer) {
   case 1:
      echo "4.50";
      break;
   case 2:
      echo "7.00";
      break;
   case 3:
      echo "9.25";
      break;
   default:
      echo "3.10";
}

3.10

7.00

4.5

2 points

QUESTION 39

With a switch statement the structure is set up to compare the variable value or expression in the parentheses of switch(expr) to a case label. If there is a match the code for that case is executed.

True

False

2 points

QUESTION 40

____ is an advantage of loosely-typed languages.

errors involving data types are easy to track down.

they allow variables to be used anywhere in the program except a function.

it makes things more flexible.

2 points

QUESTION 41

Assume a HTML form is submitted to your page. What is the significance of the word full_name in this code?

$name = $_POST["full_name"];

full_name should start with a dollar sign.

full_name must be the the name attribute of the HTML form element that was submitted to the PHP page.

"full_name is just a place holder, and its actual name can be anything."

full_name is a reserved word and cannot be used as a variable name.

2 points

QUESTION 42

"If two conditions are ORed together, and the first condition is false, the second condition is not even tested."

True

False

2 points

QUESTION 43

The _____ attribute gives the path to the page on the web server that will process form data submitted by the user.

name

size

action

method

2 points

QUESTION 44

"If two conditions are ORed together, the result is false even if only one of the conditions are false."

True

False

2 points

QUESTION 45

What is the output for y?

$y = 20;

for($i=10; $i < 5; $i -= 3)
$y += $i;

echo($y);

2 points

QUESTION 46

Variable names are _____.

case sensitive

case insensitive

2 points

QUESTION 47

What is the output?

$n1 = 3;
$n2 = 2;
$n3 = 10;

if ($n1 > $n2 && $n1 > $n3)
echo $n1;
elseif ($n2 > $n1 && $n2 > $n3)
echo $n2;
elseif ($n3 > $n1 && $n3 > $n2)
echo $n3;

2 points

QUESTION 48

The following loop displays ______.

for($i=1; $i < 8; $i++)
echo $i+1;

24681012

12345678

1234567

2345678

2 points

QUESTION 49

What does this code do?

$x = 6;
$m = (string) $x;

it sends the Boolean value false to the user's browser

it sends the Boolean value true to the user's browser

this will cause an error

it assigns $m the value "6"

2 points

QUESTION 50

3 + (4 * 5) = ?

Explanation / Answer

1) 2

2)false

3)ok too much

4) 20

5) assign $m the value 3

6) none

7)true

8) true

9) if($n>100 or $n<0)

f10) false

11) sum=9

12) sends integer to the users browser

13 an underscore

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What is the value of $m after this runs? $x = 0; $m = $x++; 0 1 2 2 points QUEST

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