Web Data Management - Test #2
- 1.A hidden field
- A.
A. appears on the form but its data is hidden
- B.
B. has data that is obscured by bullets or asterisks
- C.
C. doesn’t appear on the form but its data is sent to the server
- D.
D. appears on the form with its data grayed out
- 2.Which of the following operators does NOT perform type coercion?
- A.
A. ==
- B.
B. ===
- C.
C. >=
- D.
D. !=
- 3.Which type of loop will always execute its code at least once?
- A.
While
- B.
Do-while
- C.
For
- D.
For-in
- 4.Which of the following statements will restart the execution of a loop?
- A.
Halt
- B.
Continue
- C.
Stop
- D.
Break
- 5.What does $message contain after the following code executes? $rate = 0.1; if ( ! is_numeric($rate) ) { $message = 'Rate is not a number.'; } else if ($rate < 0) { $message = 'Rate cannot be less than zero.'; } else if ($rate > 0.2) { $message = 'Rate cannot be greater than 20%.'; } else { $message = 'Rate is valid.'; }
- A.
Rate is not a number.
- B.
Rate cannot be less than zero.
- C.
Rate cannot be greater than 20%.
- D.
Rate is valid.
- 6.What does $message contain after the following code executes? $age = 19; $score = 750; if ( $age >= 21 && $score >= 700 ) { $message = 'Loan approved'; } else if ( $age >= 21 && $score >= 650 ) { $message = 'Cosigner needed.'; } else if ( $age >= 18 && $score >= 680 ) { $message = 'Two cosigners needed.'; } else { $message = 'Loan denied.'; }
- A.
Loan approved.
- B.
Cosigner needed.
- C.
Two cosigners needed.
- D.
Load denied.
- 7.What does $message contain after the following code executes? $statusCode = "403"; switch ( $statusCode ) { case "200": $message = "OK"; break; case "403": $message = "Forbidden"; break; case "404": $message = "Not Found"; break; default: $message = "Unknown Status"; break; }
- A.
OK
- B.
Forbidden
- C.
Not Found
- D.
Unknown Status
- 8.What does $message contain after the following code executes? $message = "L: "; for ($i = 0; $i < 10; $i++ ) { $message .= $i . ", "; if ($i == 7) break; }
- A.
L: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
- B.
L: 0, 1, 2, 3, 4, 5, 6, 7,
- C.
L: 1, 3, 5, 7, 9,
- D.
L: 1, 3, 5, 7
- 9.When you use the substr function to extract a substring from a string, you need to at least pass an argument that gives
- A.
The characters in the substring that you’re looking for
- B.
The starting position of the substring
- C.
The length of the substring
- D.
The separators for the substring
- 10.A “natural” comparison of two values
- A.
Is case-sensitive
- B.
Is case-insensitive
- C.
Puts both “09” and “9” before “10”
- D.
Puts “10” before both “09” and “9”
- 11.What is stored in $message by the code that follows? $message = "The file is in \"C:\\My Documents\"";
- A.
The file is in C:\My Documents
- B.
B. The file is in "C:\My Documents"
- C.
C. The file is in C:\\My Documents\
- D.
The file is in "C:\\My Documents\"
- 12.Suppose that $name contains a last name followed by a comma and a space, followed by a first name. Then, you can store the first and last names in variables with code like this:
- A.
$i = strpos($name, ', '); $first_name = substr($name, 0, $i); $last_name = substr($name, $i+1);
- B.
B. $i = strpos($name, ', '); $first_name = substr($name, 0, $i); $last_name = substr($name, $i+2);
- C.
C. $i = strpos($name, ', '); $last_name = substr($name, 0, $i); $first_name = substr($name, $i+1);
- D.
D. $i = strpos($name, ', '); $last_name = substr($name, 0, $i); $first_name = substr($name, $i+2);
- 13.In an if statement, which is a correct right way to find out whether the string in $a comes before (is less than) the string in $b in a case-insensitive comparison?
- A.
A. if ($a < $b)
- B.
B. if ((strtolower($a) < (strtolower($b))
- C.
C. if (strcomp($a, $b) < 1)
- D.
D. if (strnatcomp($a, $b) < 1)
- 14.Suppose that $name contains a last name followed by a comma and a space, followed by a first name. Then, you can store the first and last names in variables with code like this:
- A.
A. $name = implode(', ', $name); $last_name = $name[0]; $first_name = $name[1];
- B.
B. $name = implode(', ', $name); $last_name = $name[1]; $first_name = $name[0];
- C.
C. $name = explode(', ', $name); $last_name = $name[0]; $first_name = $name[1];
- D.
D. $name = explode(', ', $name); $last_name = $name[1]; $first_name = $name[0];
- 15.If you want to round a number within an arithmetic expression, which function should you use?
- A.
Number_format
- B.
Sprintf
- C.
Round
- D.
Option 4
- 16.If you want to generate a random number that ranges from 1000 to 500,000 as a multiple of 100 (1000, 1100, 1200, etc.), and store it in a variable named $number, you can use the code that follows.
- A.
$number = mt_rand(1000,500000);
- B.
$number = mt_rand(100,50000); $number *= 10;
- C.
$number = mt_rand(1,500); $number *= 1000;
- D.
$number = mt_rand(10,5000); $number *= 100;
- 17.When you create a DateInterval object, you pass it one argument that specifies one or more of the following:
- A.
Years, months, days
- B.
Hours, minutes, seconds
- C.
Years, months, days, hours, minutes, seconds
- D.
Years, months, weeks, days, hours, minutes, seconds
- 18.Which of the following statements is NOT a valid way to create a timestamp named $birthdate that represents December 2, 1969?
- A.
$birthdate = mktime(0, 0, 0, 12, 2, 1969);
- B.
$birthdate = mktime(12, 2, 1969);
- C.
$birthdate = strtotime('1969-12-02');
- D.
$birthdate = strtotime('12/02/1969');
- 19.To create a DateTime object that represents a due date that’s 90 days after the current date, you use the following code:
- A.
$days = new DateInterval('P90D'); $due_date = date(); $due_date = $due_date->add($days);
- B.
b. $days = new DateInterval('P90D'); $due_date = new DateTime(); $due_date = $due_date->add($days); (Technically, the book says that: $due_date->add($checkout_length); is the proper way to use the ->add() method without the $due_date = to the left.
- C.
$days = new DateInterval('P90D'); $due_date = date(); $due_date = $due_date + $days;
- D.
$days = new DateInterval('P90D'); $due_date = new DateTime(); $due_date = $due_date + $days;
- 20.Code example 10-1 $current_date = new DateTime(); $due_days_diff = $current_date->diff($due_date); if ($current_date > $due_date) { $overdue_message = $due_days_diff->format( '%y years, %m months, and %d days overdue.'); } 14. (Refer to code example 10-1) If $due_date contains a DateTime object, $due_date_diff will contain
- A.
A TimeStamp object
- B.
A DateTime object
- C.
A DateInterval object
- D.
A TimeInterval object
- 21.Code example 10-1 $current_date = new DateTime(); $due_days_diff = $current_date->diff($due_date); if ($current_date > $due_date) { $overdue_message = $due_days_diff->format( '%y years, %m months, and %d days overdue.'); } (Refer to code example 10-1) If $due_date contains a DateTime object for a date that comes 1 month and 7 days before the date stored in the $current_date variable, what will $overdue_message contain when this code finishes executing:
- A.
0 years, 1 months, and 7 days overdue.
- B.
-0 years, -1 months, and -7 days overdue.
- C.
1 month and 7 days overdue.
- D.
Overdue_message won’t be set because the if clause won’t be executed
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