Questions and answers for exam Preparation

MCQs

Total Questions : 26 | Page 1 of 3 pages

Question 1. Which of the following php statement/statements will store 111 in variable num?i) int $num = 111;ii) int mum = 111;iii) $num = 111;iv) 111 = $num;

Both (i) and (ii)
All of the mentioned.
Only (iii)
Only (i)

Discuss Question

Answer: Option C. -> Only (iii)

You need not specify the datatype in php.

Question 2. What will be the output of the following php code
< ?php
$num = 1;
$num1 = 2;
print $num . "+". $num1 ;
?>

3
1+2
1.+.2
Error

Discuss Question

Answer: Option B. -> 1+2

.(dot) is used to combine two parts of the statement. Example ( $num . "Hello World ) will output 1Hello World.

Question 3. What will be the output of the following code?
< ?php
$foo = 'Bob';
$bar = &$foo;
$bar = "My name is $bar";
echo $bar;
echo $foo;
?>

Error
My name is BobBob
My name is BobMy name is Bob
My name is Bob Bob

Discuss Question

Answer: Option C. -> My name is BobMy name is Bob

The $bar = &$foo; line will reference $foo via $bar.

Question 4. What will be the output of the following php code?
< ?php
$num = "1";
$num1 = "2";
print $num+$num1 ;
?>

3
1+2
Error
12

Discuss Question

Answer: Option A. -> 3

The numbers inside the double quotes are considered as integers and not string, therefore the value 3 is printed and not 1+2.

Question 5. Which of following variables can be assigned a value to it?(i) $3hello(ii) $_hello(iii) $this(iv) $This

All of the mentioned
Only (ii)
(ii), (iii) and (iv)
(ii) and (iv)

Discuss Question

Answer: Option D. -> (ii) and (iv)

A variable can't start with a number. Also $this is a special variable that can't be assigned, but $This can be assigned.

Question 6. Which of the below statements is equivalent to $add += $add ?

$add = $add
$add = $add +$add
$add = $add + 1
$add = $add + $add + 1

Discuss Question

Answer: Option B. -> $add = $add +$add

a += b is an addition assignment whose outcome is a = a + b. Same can be done with subtraction,multiplication,division etc.

Question 7. What will be the output of the following code?
< ?php
function track() {
static $count = 0;
$count++;
echo $count ;
}
track();
track();
track();
?>

Discuss Question

Answer: Option A. -> 123

Because $count is static, it retains its previous value each time the function is executed.

Question 8. Which statement will output $x on the screen?

echo \$x";
echo $$x";
echo /$x";
echo $x;

Discuss Question

Answer: Option B. -> echo $$x";

A backslash is used so that the dollar sign is treated as a normal string character rather than prompt PHP to treat $x as a variable. The backslash used in this manner is known as escape character.

Question 9. What will be the output of the following PHP code?
< ?php
$a = "clue";
$a .= "get";
echo "$a";
?>

get
true
false
clueget

Discuss Question

Answer: Option D. -> clueget

.= is a concatenation-assignment. $a equals its current value concatenated with "get.

Question 10. What will be the output of the following PHP code?
< ?php
$team = "arsenal";
switch ($team) {
case "manu":
echo "I love man u";
case "arsenal":
echo "I love arsenal";
case "manc":
echo "I love manc"; }
?>