The read system call, used on a terminal in non-blocking mode
A. returns 0 if no characters are available
B. returns -1 if no characters are available
A. returns 0 if no characters are available
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What does the following statement do? type def int one D Array[20];
A) It creates an array of 20 integers. B) It makes one D Array a copy of another 20-integer array. C) It makes one D Array an alias for a data type that holds 20 integers. D) It creates a one-dimensional integer array with all elements initialized to 20. E) It does none of the above.
If you want to test code form international documents, you will need to select a different option from the validator ____ list box.
A. File B. XML C. DTD D. Encoding
Translate the brokerage into an SQL schema. Use the necessary SQL machinery to express all constraints speci?ed in the E-R model.
We will start with the diagram in Figure 4.30. In translating this E-R diagram, we choose to combine IsHandledBy with Account, WorksIn with Broker,and Office with ManagedBy. The rationale for these combinations is that in each case the entity type is a key role in the corresponding relationship. The reason why ManagedBy is combined with Office rather than Broker (which also happens to be a key role in the ManagedBy relationship) is that it is more likely for an o?ce to have a manager than it is for a broker to be a manager. Therefore, combining Office with ManagedBy into one table is unlikely to lead to many null values being stored with the Office table. In contrast, combining ManagedBy with Broker is likely to cause a situation where the value of the attribute Manages of the table Broker would be mostly NULL.
A chart placed on a worksheet with the source data is:
A) A column chart B) An embedded chart C) A chart sheet