________ arises in three different contexts: multiple applications, structured applications, and operating system structure.
Fill in the blank(s) with the appropriate word(s).
Concurrency
Computer Science & Information Technology
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Provide the equivalent tuple relational calculus and domain relational calculus expressions for each of the relational algebra queries given in Exercise 4.8.
a) ?hotelNo (?price ? 50 (Room) ) b) ?Hotel.hotelNo ? Room.hotelNo(Hotel ? Room) c) ?hotelName (Hotel Hotel.hotelNo ? Room.hotelNo (?price ? 50 (Room)) ) d) Guest (?dateTo ? ‘1-Jan-2007’ (Booking)) e) Hotel Hotel.hotelNo ? Room.hotelNo (?price ? 50 (Room)) ) f) ?guestName, hotelNo (Booking Booking.guestNo ? Guest.guestNo Guest) ?
Computer Science & Information Technology
The _______________ utility can be used to repair .ost and .pst files, and is included with Microsoft Outlook.?
A. ?fixmail.exe B. ?scanpst.exe C. ?repairpst.exe D. ?rebuildpst.exe
Computer Science & Information Technology