When setting up a pipe to a child, the order of system calls is
A. the parent calls fork, then both processes call pipe
B. the parent calls pipe then calls fork
B. the parent calls pipe then calls fork
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Consider the relational schema in Figure 3.6. Assume that the Web server delivers the contents of these relations using the following XML format: the name of the relation is the top-level element, each tuple is represented as a tuple element, and each relation attribute is represented as an empty element that has a value attribute. For instance, the Student relation would be represented as
follows:
Formulate the following queries using XQuery: a. Produce the list of all students who live on Main Street. b. Find every course whose CrsCode value does not match the Id of the department that o?ers the course. (For instance, the course IS315 in information systems might be o?ered by the Computer Science (CS) Department.) c. Create a list of all records from the Teaching relation that correspond to courses taught in the fall semester.
When using Advanced Filtering, the criteria range must contain at least:
A) three columns. B) two rows. C) three rows. D) one columns.
Which of the following is a DISADVANTAGE of purchasing prewritten software?
A. It may eliminate the need to hire personnel specifically dedicated to a project. B. The company can know what it is getting before it invests in the product. C. The company can try out the software before purchasing it. D. The software is controlled by another company.
Software reliability problems can almost always be traced toA) errors in accuracy B) errors in design C) errors in implementation D) errors in operation
What will be an ideal response?