Below is the first set of activities (Phase I) in constructing a new house, the respective time required to finish each activity, and the precedence relations. Activity A Predecessor Duration (in wks) Description Clear site Bring utilities to the site Excavate B C 2 A 1 D Pour Foundation 2 Outside Plumbing B.C 6 Frame House D 8 3 2 Do electric wiring Lay Floor Lay Roof Inside Plumbing F F 1 E,H 5 (a) Construct the AON network. (b) Using AOA network, find the critical path/s and the project completion time. Summarize the results in a CPM Table. (c) What event is represented by node 2? Note: labeling starts at 0. (d) What activities will have to be completed by week 15 to guarantee that the project will not be delayed? (e) When should framing of the house start in order to finish the Phase I on time? (f) What is the largest number of weeks allotted to finish the electrical wirings without delaying the project? CHIS

Below is the first set of activities (Phase I) in constructing a new house, the respective time required to finish each activity, and the precedence relations. Activity A Predecessor Duration (in wks) Description Clear site Bring utilities to the site Excavate B C 2 A 1 D Pour Foundation 2 Outside Plumbing B.C 6 Frame House D 8 3 2 Do electric wiring Lay Floor Lay Roof Inside Plumbing F F 1 E,H 5 (a) Construct the AON network. (b) Using AOA network, find the critical path/s and the project completion time. Summarize the results in a CPM Table. (c) What event is represented by node 2? Note: labeling starts at 0. (d) What activities will have to be completed by week 15 to guarantee that the project will not be delayed? (e) When should framing of the house start in order to finish the Phase I on time? (f) What is the largest number of weeks allotted to finish the electrical wirings without delaying the project? CHIS

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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25. Which expression below will return the time an individual entity spent in the system in Simio, using built-in Simio functions (i.e. not user-defined functions)? a. TimeNow - TimeCreated b. TimeInSystem c. ModelEntity.TimeInSystem d. TimeNow - ModelEntity.TimeCreated e. TimeNow - ModelEntity.TimeInSystem
Clayton Elementary School is converting the wish list request form below into online form because of COVID-19. 1. Class Diagram: Class name, attributes, and data type Operations (Methods) that you need to perform 'Fill Wishlist' Relationship between classes. Multiplicity of each relationship Assumptions that you need if any Sequence Diagram: Actor, boundary, and control objects Objects that participate this use case Messages, operations, etc. that indicate a successful filling of the form as illustrated in the form above.
For the given design, Which of the following is NOT true about the design? Select one: a. It supports modular design. b. The AuthenticateUser sequence diagram can be reused only after a doB message call. c. The AuthenticateUser sequence diagram can be reused only when the authenticate() message is invoked on a B object. d. The DoFoo sequence diagram can be reused in any context where a B object and a C object are involved. e. The doB message must be called after the doA message.
87. A relationship should be specified how in the ODL? a. One direction starting with the first class b. One direction starting with the second class c. Neither direction. d. Both directions.
Question 17 Which of the following is another term for a recursive relationship? Group of answer choices ternary relationship binary relationship supertype relationship subtype relationship unary relationship
Safe Datalog Rule: A Datalog rule is of the form:p :- q1, ..., qn. where n>0 and p is a positive atomic formula and q1, ..., and qn are positive or negative atomic formulas. A positive atomic formula is of the form:r(x1, ..., xm) and a negative atomic formulas of the form:not r(x1, ..., xm) where m>0 and r is a relation name and x1 , ..., xm are either numbers or variables. Relation names and variables are made up of alphabetic letters or digits and start with a lower-case alphabetic letter. Even though the variables are made up of lower and upper-case letters, these should be considered case-insensitive. For example, cno, CNO, cNO, etc all should be treated as the same variable. Some examples of Datalog rules are given below: ancestor(x1, y1) :- parent(x1, y1). teaches(tno,cno) :- faculty(tno), course(cno), assigned(tno,cno). p(x,y) :- q(2,x), r(u,45,z), s(a,b,22). p(x,y,z) :- q(x), not r(y,20), s(x,z). A Datalog rule is considered “Safe” if all variables that appear to the left…
Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive". Maintenance…
Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive". Maintenance…
Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive". Maintenance…
Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive".…
The use of selection structures is very important in programming, yet these structures cannot accommodate every scenario. Each and every application has to iterate through the identical statements for a variety of consumers, online clients, transactions, and so on. Do special frameworks need to be adhered to for these occupations? What makes these structures unique?
Given the following relation that stores details of employees and their projects: ProjectID EmployeeName EmployeeSalary 100-A Salim Housni 2000 100-A Taleb Maashani 1800 100-B Taleb Maashani 1800 200-A Salim Housni 2000 200-B Salim Housni 2000 200-C Salim Housni 1350 200-C Taleb Maashani 1800 200-D Salim Housni 1350 If the functional dependencies are consistent with the above relation, put TRUE. If they are not, put FALSE ProjectID --> EmployeeName (....) ProjectID --> EmployeeSalary (....) ProjectID , EmployeeName -->EmployeeSalary (....) EmployeeName --> EmployeeSalary (....) EmployeeSalary --> ProjectID (....) EmployeeSalary --> EmployeeName , ProjectID (....)