A business model defines how a business distributes its products and services.
Answer the following statement true (T) or false (F)
False
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A for statement contains three expressions: initialization, test, and
a. update b. reversal c. null d. validation e. None of these
Answer the following queries using relational algebra:
Consider the following relational schema, where the keys are underlined:
Employee ( ssn, name, gender, address, salary, supervisorSSN, dnumber )
Department ( dnumber, dmname, managerSSN)
DeptLocation ( dnumber, dlocation)
Project (pnumber, pname, plocation)
WorksOn (emplSSN, pnumber, hours)
(a) Retrieve the names of all male employees in department number 666, who work more
than 13 hours per week on project "Catch 22".
(b) Find the names of employees who are two managerial levels below the employee "Joe
Public".
(c) Find names of the department that have no employees.
(d) Find those employees in department number 123 who do not work on any project at
location NYC.
A ________ attack uses software to try thousands of common words sequentially in an attempt to gain unauthorized access to a user's account.
A. Trojan horse B. web bug C. denial-of-service D. dictionary
All smartphones use the Android operating system.
Answer the following statement true (T) or false (F)