QUESTION 1 \"What will be displayed when the following code is executed? $number

ID: 3884305 • Letter: Q

Question

QUESTION 1

"What will be displayed when the following code is executed?

$number = 6;

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

3 0

6 3

3 0 -3

0 -3

QUESTION 2

If an if-statement or loop header has several statements associated with it you must enclose those statements in curly braces.

True

False

4 points

QUESTION 3

If two conditions are ORed together the result is false only if both conditions are false.

True

False

4 points

QUESTION 4

The following loop displays ______.

for($i=1; $i < 11; $i++)
echo $i;

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9

1 2 3 4 5

1 3 5 7 9

2 4 6 8 10

4 points

QUESTION 5

Assuming you don't use xor how do you test whether one and only one of two variables is zero?

if ($x == 0 and $y != 0 or $y == 0 and $x != 0)

if ($x = 0 or $y = 0)

if ($x == 0 or $y == 0)

if ($x == 0 and $y != 0 and $y == 0 and $x != 0)

QUESTION 6

Which city is echoed?

$answer = 4;

switch($answer) {
case 1:
echo ""Detroit"";
break;
case 3:
echo ""Chicago"";
break;
case 5:
echo ""Nashville"";
break;
default:
echo ""New York"";
}

New York

Chicago

Detroit

Nashville

QUESTION 7

What is the output for y?

$y = 0;
for($i=0; $i < 10; $i += 2) {
$y += $i;
}

echo $y;

QUESTION 8

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

QUESTION 9

if two conditions are ANDed together the result is true only if either condition is true.

True

False

QUESTION 10

true || false = false

True

False

QUESTION 11

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

$count = 0;

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

QUESTION 12

What is echoed for $y?

$y = 0;
for($i=1; $i < 10; $i++) {
$y += $i;
}

echo $y;

QUESTION 13

The break statement will cause a for-loop to skip to the next iteration.

True

False

QUESTION 14

A continue statement causes a loop to abort the current iteration and begin again with a new iteration.

True

False

QUESTION 15

What is the output?

$n1 = 31;
$n2 = 52;
$n3 = 10;

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

QUESTION 16

Because there is only a single line associated with the if-statement in the following 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

QUESTION 17

In a switch statement if none of the case labels match the tested variable or expression then the else clause is executed.

True

False

QUESTION 18

What is the output for $y?

$y = 0;
for($i=10; $i > 1; $i -= 2){
y$ += $i;
}

echo $y;

QUESTION 19

One pass through the body of a loop is called an iteration.

True

False

QUESTION 20

What is the output of the following code?

$x = 0;

while ($x < 4)
$x = $x + 1;

echo $x;

QUESTION 21

How many times is the echo statement executed?

for($i=0; $i < 10; $i++)
for($j=0; $j < 10; $j++)
echo "PHP"

100

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

QUESTION 23

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

QUESTION 24

What is $sum after this code runs?

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

sum = 8

sum = 4

sum = 5

QUESTION 25

What value of $temp short circuits the $temp <= 100 test in this expression? if ($temp >= 32 and $temp <= 100)

$temp = 0

$temp = 32

$temp = 100

$temp = 75

3 0

6 3

3 0 -3

0 -3

Explanation / Answer

Q1 3 0

Q2 true

whenever there are multiple statement for the if loop they shoul be included in the parenthesis

Q3 true

or will return true if any one of the condition is true

Q4 1 2 3 4 5 6 7 8 9 10

since the loop will start from 0 and end at 10 since in the for loop it is written i < 11

as soon the value of the variable i is incremented to 11 the condition will be false and the for loop will not be executed firther

Q5 if ( ($x == 0 and $y != 0 ) or ($y == 0 and $x != 0) )

Q6 New York

Q7 20

since i is incremented by 2 and the resukts is added in y

so 2 + 4 + 6 + 8 = 20

Q8 true

Q9 false

for AND , if both the condition is true then only the result will be true otherwise the result will be false;

Q10 true

Q11 10 times

Q12 45

add 1 to 9

Q13 false

break statement will cause the for loop to terminatte the execute the next instruction after the for loop

Q14 true

Q15 52

Q16 true

Q17 false

if none of the case matches then the default in the switch is executed

Q18 30

add 10 + 8 + 6 + 4 + 2

Q19 true

Q20 4

Q21 100

it's a nested loop i loop will start from 0 to 9 i.e. 10 times for each value of i the j loop will execute from 0 to 9 i.e. 10 times so 10 * 10 = 100 times

Q22 true

Q23 infinite times

sice the condition in the while loop will always be true

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