Web Data Management - Test #2

21 Questions | By Trunkz0r | Last updated: Mar 31, 2014 | Total Attempts: 486

Questions

Settings

Questions and Answers

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