Another word for revising a document is ________
A) editing B) cropping C) debugging D) saving
A
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Consider the relational database schema of Figure 3.5. Suppose that all the relations were created by (and hence are owned by) user X, who wants to grant the following privileges to user accounts A, B, C, D, and E:
(a) Account A can retrieve or modify any relation except DEPENDENT and can grant any of these privileges to other users. (b) Account B can retrieve all the attributes of EMPLOYEE and DEPARTMENT except for SALARY, MGRSSN, and MGRSTARTDATE. (c) Account C can retrieve or modify WORKS_ON but can only retrieve the FNAME, MINIT, LNAME, SSN attributes of EMPLOYEE and the PNAME, PNUMBER attributes of PROJECT. (d) Account D can retrieve any attribute of EMPLOYEE or DEPENDENT and can modify DEPENDENT. (e) Account E can retrieve any attribute of EMPLOYEE but only for EMPLOYEE tuples that have DNO = 3. (f) Write SQL statements to grant these privileges. Use views were appropriate.
The wireless access points that are used in homes contain integrated routers, as do the devices that ISPs typically provide for Internet connectivity.
Answer the following statement true (T) or false (F)
Which of the following statements about recursion is false?
A. It is a looping process. B. It requires a base case to terminate the recursion. C. Its solution is generally shorter than a non-recursive solution. D. It is more efficient than iterative solutions. E. It is not available in all languages.
Answer the following statements true (T) or false (F)
1) Input devices allow the computer to receive data. They are things such as a keyboard or mouse. 2) CPU is the heart of the computer. It tells the computer when input is received and when output should be displayed. It also helps in the storage of data to memory. 3) Secondary storage stores data for large amounts of time. 4) Logical decisions are made by the CPU.