Why is it difficult to choose which processes to “flush” in deadlock recovery?
What will be an ideal response?
From the user’s perspective, no user wants to be flushed. From the system’s perspective, the system wants to flush the smallest set of noncritical jobs to enable the largest set of critical jobs to finish. It is not always possible for the system to know how critical a job is.
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Which of the following is not a case in which function terminate is called?
a. When the exception mechanism cannot find a matching catch for a thrown exception. b. When the abort function is called before any call to function set_abort. c. When a destructor attempts to throw an exception during stack unwinding. d. When an attempt is made to rethrow an exception when there is no exception currently being handled.
The command to list a hierarchy of directories is
a: ls -R directory -name b: ls -a directory -name c: ls -all directory -name d: ls -hierarchy directory -name e: ls directory –name all
Create an ER model for each of the following descriptions:
(a) A large organization has several parking lots, which are used by staff. (b) Each parking lot has a unique name, location, capacity, and number of floors (where appropriate). (c) Each parking lot has parking spaces, which are uniquely identified using a space number. (d) Members of staff can request the sole use of a single parking space. Each member of staff has a unique number, name,telephone extension number, and vehicle license number. (e) Represent all the ER models described in parts (a), (b), (c), and (d) as a single ER model. Provide any assumptions necessary to support your model.
The correct salutation for a letter addressed to a company is ____.
A. Dear Company B. Dear Sir C. Ladies and Gentlemen D. To Whom It May Concern