PHP Level 1 Exam
1. What is the correct way to add 1 to the $counter variable?
Answer: $counter++;
2. What function raises the first argument to the power of the second argument, with decimal places to be specified by the scale factor?
Answer: bcpow();
Example:
<?php echo bcpow('4.2', '3', 2); // 74.08 ?>
3. Which operator performs the same function as x=x%y?
Answer: %=
Example
<?php
$x = 9;
$y = 4;
echo $x%$y; // output is: 1
echo $x %= $y; // output is: 1
?>
4. Which file mode will read and write to the end of an existing file or create a new file?
Answer: w+
Basic file modes
| r | Read only. Starts at the beginning of the file |
| r+ | Read/Write. Starts at the beginning of the file |
| w | Write only. Opens and clears the contents of file; or creates a new file if it doesn't exist |
| w+ | Read/Write. Opens and clears the contents of file; or creates a new file if it doesn't exist |
| a | Append. Opens and writes to the end of the file or creates a new file if it doesn't exist |
| a+ | Read/Append. Preserves file content by writing to the end of the file |
| x | Write only. Creates a new file. Returns FALSE and an error if file already exists |
| x+ | Read/Write. Creates a new file. Returns FALSE and an error if file already exists |
5. Which of the following is correct for adding a comment in a PHP script?
Answer: /* comment */
Type of comments in PHP
// or # single line comment
/* */ multi line comment
6. Which function returns (and caches) the owner ID number?
Answer: fileowner()
7. Which of the following is the correct way to implement a do-while loop?
Answer:
$j = 0;
do { print "$j"; }
while ($j > 0);
8. Which statement will skip the rest of the current loop iteration and continue execution at the beginning of next iteration.
Answer: continue
9. Which of the following is correct to show a message for an exception?
Answer: throw new Exception ("Invalid data");
Example
<?php
function inverse($x) {
if (!$x) {
throw new Exception('Division by zero.');
}
return 1/$x;
}
?>
10. What term refers to the ability to shorten Extra_Long_Names improving readability of source code?
Answer: Aliasing
11. What PHP function returns the arctangent in radians of a numerical argument?
Answer: atan()
12.Which function is used to start tracking a user?
Answer: session_start()
13. What statement will delete session files?
Answer: session_destroy()
14. How are sessions tracked on PHP
Answer: with code rewriting using the PHP Session reference variable
15. The file handle argument in fread() allows you to specify ___________.
Answer: the number of bytes you wish to read
PHP Level 1 Exam
1. What is the correct way to add 1 to the $counter variable?
Answer: $counter++;
2. What function raises the first argument to the power of the second argument, with decimal places to be specified by the scale factor?
Answer: bcpow();
3. Which operator performs the same function as x=x%y?
Answer: %=
Answer: %=
4. Which file mode will read and write to the end of an existing file or create a new file?
Answer: w+
Basic file modes
Answer: w+
Basic file modes
r | Read only. Starts at the beginning of the file |
r+ | Read/Write. Starts at the beginning of the file |
w | Write only. Opens and clears the contents of file; or creates a new file if it doesn't exist |
w+ | Read/Write. Opens and clears the contents of file; or creates a new file if it doesn't exist |
a | Append. Opens and writes to the end of the file or creates a new file if it doesn't exist |
a+ | Read/Append. Preserves file content by writing to the end of the file |
x | Write only. Creates a new file. Returns FALSE and an error if file already exists |
x+ | Read/Write. Creates a new file. Returns FALSE and an error if file already exists |
5. Which of the following is correct for adding a comment in a PHP script?
Answer: /* comment */
Type of comments in PHP
// or # single line comment
/* */ multi line comment
6. Which function returns (and caches) the owner ID number?
Answer: fileowner()
7. Which of the following is the correct way to implement a do-while loop?
Answer:
$j = 0;
do { print "$j"; }
while ($j > 0);
8. Which statement will skip the rest of the current loop iteration and continue execution at the beginning of next iteration.
Answer: continue
9. Which of the following is correct to show a message for an exception?
Answer: throw new Exception ("Invalid data");
10. What term refers to the ability to shorten Extra_Long_Names improving readability of source code?
Answer: Aliasing
11. What PHP function returns the arctangent in radians of a numerical argument?
Answer: atan()
12.Which function is used to start tracking a user?
Answer: session_start()
13. What statement will delete session files?
Answer: session_destroy()
14. How are sessions tracked on PHP
Answer: with code rewriting using the PHP Session reference variable
15. The file handle argument in fread() allows you to specify ___________.
Answer: the number of bytes you wish to read
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