Web Data Management - Test #2

21 Questions

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Data Management Quizzes & Trivia

Questions and Answers
  • 1. 
    • 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. 
    • 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