EBK DATABASE CONCEPTS
7th Edition
ISBN: 9780133777840
Author: AUER
Publisher: VST
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Chapter 7, Problem 7.44RQ
Explanation of Solution
XML:
XML stands for “Extensible Markup Language” which provides independent tool for describing the data.
- XML data is also referred as self-describing, which means the structure of the data is fixed with the data.
- Therefore, there is no need to pre-build the structure of the data when it arrives to store in the
database ...
- Therefore, there is no need to pre-build the structure of the data when it arrives to store in the
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Chapter 7 Solutions
EBK DATABASE CONCEPTS
Ch. 7 - Prob. 7.1RQCh. 7 - Prob. 7.2RQCh. 7 - Prob. 7.3RQCh. 7 - Prob. 7.4RQCh. 7 - Prob. 7.5RQCh. 7 - Prob. 7.6RQCh. 7 - Prob. 7.7RQCh. 7 - Prob. 7.8RQCh. 7 - Prob. 7.9RQCh. 7 - Prob. 7.10RQ
Ch. 7 - Prob. 7.11RQCh. 7 - Prob. 7.12RQCh. 7 - Prob. 7.13RQCh. 7 - Prob. 7.14RQCh. 7 - Prob. 7.15RQCh. 7 - Prob. 7.16RQCh. 7 - Prob. 7.17RQCh. 7 - Prob. 7.18RQCh. 7 - Prob. 7.19RQCh. 7 - Prob. 7.20RQCh. 7 - Prob. 7.21RQCh. 7 - Prob. 7.22RQCh. 7 - Prob. 7.23RQCh. 7 - Prob. 7.24RQCh. 7 - Prob. 7.25RQCh. 7 - Prob. 7.26RQCh. 7 - Prob. 7.27RQCh. 7 - Prob. 7.28RQCh. 7 - Prob. 7.29RQCh. 7 - Prob. 7.30RQCh. 7 - Prob. 7.31RQCh. 7 - Prob. 7.32RQCh. 7 - Prob. 7.33RQCh. 7 - Prob. 7.34RQCh. 7 - Prob. 7.35RQCh. 7 - Prob. 7.36RQCh. 7 - Show a snippet of PHP code for creating a...Ch. 7 - Show a snippet of PHP code for displaying the...Ch. 7 - Show a snippet of PHP code for disconnecting from...Ch. 7 - Prob. 7.40RQCh. 7 - Prob. 7.41RQCh. 7 - Prob. 7.42RQCh. 7 - Prob. 7.43RQCh. 7 - Prob. 7.44RQCh. 7 - Prob. 7.45RQCh. 7 - Prob. 7.46RQCh. 7 - Prob. 7.47RQCh. 7 - What is the purpose of the FOR XML expression in...Ch. 7 - Prob. 7.49RQ
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- Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command: Osh> !! The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command. Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command: Osh> ! 3 The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command. Error handling: The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."arrow_forwardActivity No. Activity Time (weeks) Immediate Predecessors 1 Requirements collection 3 2 Requirements structuring 4 1 3 Process analysis 3 2 4 Data analysis 3 2 5 Logical design 50 3,4 6 Physical design 5 5 7 Implementation 6 6 c. Using the information from part b, prepare a network diagram. Identify the critical path.arrow_forward2. UNIX Shell and History Feature [20 points] This question consists of designing a C program to serve as a shell interface that accepts user commands and then executes each command in a separate process. A shell interface gives the user a prompt, after which the next command is entered. The example below illustrates the prompt osh> and the user's next command: cat prog.c. The UNIX/Linux cat command displays the contents of the file prog.c on the terminal using the UNIX/Linux cat command and your program needs to do the same. osh> cat prog.c The above can be achieved by running your shell interface as a parent process. Every time a command is entered, you create a child process by using fork(), which then executes the user's command using one of the system calls in the exec() family (as described in Chapter 3). A C program that provides the general operations of a command-line shell can be seen below. #include #include #define MAX LINE 80 /* The maximum length command */ { int…arrow_forward
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