murachs_php_4E_chapter10

a. 12/25/2021 c. December 25, 2021 b. Dec. 25, 2021 d. 12/25/21 ANS: D 12. Timestamps will encounter a/an _______ problem if they are not converted to DateTime objects. a. Y2K c. Y10K b. Y2K38 d. Y69K ANS: B 13. A timestamp stores the number of ________________ since midnight on January 1, 1970 GMT. a. hours c. seconds b. minutes d. microseconds ANS: C 14. Because most systems today store timestamps as 32-bit signed integers, the upper limit of a timestamp on these systems is January 19 in the year________________. a. 2025 c. 2035 b. 2028 d. 2038 ANS: D 15. The use of ________________ objects resolves the Y2K38 problem because the upper limits of dates and times are essentially removed. a. Date c. Time b. DateTime d. DateInterval ANS: B 16. To create a DateTime object for the current date, you use the ________________ keyword and pass no arguments to the constructor. a. date c. new b. now d. create ANS: C 17. To create a DateTime object based on the date and time you specifiy, you use a/an ________________ template. a. absolute c. fixed b. relative d. adjustable ANS: A 18. To create a DateTime object based on an offset you specify to the current date and time, you use a/an ________________ template. a. absolute c. fixed b. relative d. adjustable ANS: B 19. Which of the following functions can you use to modify a DateTime object?