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A. sleep() suspends operations and usleep() resumes them　　B. sleep() accepts seconds and usleep() accepts milliseconds
　　C. sleep() works for the current process and usleep() works for all processes
　　D. sleep() can only be specified for the current user and usleep() can be specified for all users
34. You need to know how many elements are in an array. What function should you use to count this? A. list()　　B. count()
　　C.number()
　　D. sizeof()
35. Information about a session, by default, is configured in the PHP configuration file to be saved beneath which directory? A. /var　　B. /etc
　　C. /tmp
　　D. /usr
36. Which of the following contains variables provided to a scrīpt by means of the server environment? A. $_FILES　　B. $_POST
　　C. $_GET
　　D. $_ENV
37. Which of the following can be used to delete a file? A. delete()　　B. rid()
　　C.unlink()
　　D. close()
38. Which of the following functions can be used to destroy a variable? A.erase　　B. fi
　　C. remove
　　D. unset
39. Which mode of the fopen() function opens a file for writing and places the file pointer at the end of the file? A. w　　B. a
　　C. r+
　　D. w+
40. Which HTTP variable contains the browser type, and browser version, among other values? A. BROWSE_AGENT　　B. BROWSER_TYPE
　　C. BROWSER_ENV
　　D. HTTP_USER_AGENT
41. If the current value of $bsns is 4400, what is the new value as a result of this command: $bsns -= 150; A. -150　　B. 150
　　C. 4250
　　D. 4400
　　E. 4550
　　F. "4400-150"
42. What are used to enclose conditional expressions? A. brackets [ ]　　B. parentheses ( )
　　C. curly braces { }
　　D. quotation marks " "
43. Which PHP data type can be either TRUE or FALSE? A. Truth　　B. Integer
　　C. Boolean
　　D. Float
44. Which of the following contains variables provided to a scrīpt by means of file uploads? A. $_FILES　　B. $_POST
　　C. $_GET
　　D. $_ENV
45. Which constant>A.URAND　　B.END_NUMBER
　　C.ULIMIT
　　D.RAND_MAX
46. PHP provides support for POSIX through functions of which>A. grep　　B. ereg
　　C. psx
　　D. efgrp
47. From a Boolean standpoint, every zero value in PHP is considered: A. True　　B. False
　　C. Error
　　D. Null
48. Which function places results in the opposite order of asort()? A. arsort()　　B.rev()
　　C. trosa()
　　D.zsort()
49. Which printf type specifier is used for a string? A. d　　B. f
　　C. s
　　D. u
50.Which PHP conditional operator means not equal to? A. !=　　B. =!
　　C.
　　D.
Answers 1. The closing tag used by PHP is ?>. Answer: C.2. The PHP conditional operator of three equal signs (===) means the values are equal and of the same data type.Answer: C.3. PHP variable names are case sensitive and variables do not need to be declared before they can be used. Answer: A and D.4. The include instruction will create a warning, but allow the scrīpt to continue running when an error is encountered. Answer: C.5. There are at least three ways to create comments in a PHP scrīpt, and