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Consider the relational database of Figure 6.22 where the primary keys are underlined. Give an expression in tuple relational calculus for each of the following queries:
a. Find all employees who work directly for "Jones."
b. Find all cities of residence of all employees who work directly for "Jones."
c. Find the name of the manager of the manager of "Jones."
d. Find those employees who earn more than all employees living in the city "Mumbai."
Explain how to enforce total participation constraints using complex check constraints or assertions (see Section 4.4.7). (Unfortunately, these features are not supported on any widely used database currently.)
Assume you are using the 192.168.0.0/16 address block to create subnets for a typical medium-sized business with about 2000 employees.
Cloud computing compared to traditional computing
Suppose an algorithm has two parts. The first part involves sorting and takes (10 nlog n) steps, where n is the input size. What is the asymptotic time complexity of the overall algorithm, in Big Theta notation?
Knowing that this violates Redundancy Principle, but wanting to accommodate employees with disabilities, what would you suggest instead? How would your decision meet accessibility guidelines?
Graphical User Interface (GUI) became the preferred method of interacting with a computer system. Beginning with the Xerox-developed GUI in 1970, GUI-based platforms have evolved from the Apple Macintosh to the Microsoft Windows operating syste..
Summarize the project requirements and other assumptions (i.e., budget, human resources, workload, environmental dependencies, etc.). Define a work breakdown structure and describe the methodology behind constructing one.
Write pseudocode for the following statements: The variable N starts with the value 1000. The variable T starts with the value 200. The variable B starts with the value 4.
how to create a system restorepoint in task scheduling using the GUI in Windows 7 and task scheduling using the AT command in Windows 7.
Explain how Sarbanes-Oxley strengthened the enforcement of securities fraud and helped with the implementation of accounting reforms.
How would you successively normalize it completely?
What does the processor do when it receives an interrupt request from an external device? Describe the sequence of events and the signals activated.
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