« previous next »

Author Question: A use case: A) summarizes an activity, its trigger, input, and output. B) describes a subsystem ... (Read 41 times)

penza

  • Hero Member
  • *****
  • Posts: 1,022
on: Jul 7, 2018
A use case:
 
  A) summarizes an activity, its trigger, input, and output.
  B) describes a subsystem of a data flow diagram showing how the processes use data produced by other processes.
  C) describes how the data is partitioned into programs for different users.
  D) shows when the data is updated, read, created or deleted.

Question 2

Which of the following best defines a candidate key?
 
  A) It is an arbitrary, random key with no business meaning
  B) It is an attribute that naturally belongs to an entity
  C) It is made of two or more attributes combined
  D) It is an attribute that could potentially be used for a primary key


Jossy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 7, 2018
Answer to Question 1

A

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
When the exhaust is rich, the output of a zirconia oxygen sensor is above 450 mV. When the exhaust is rich, the output of a zirconia oxygen sensor is above 450 mV.
A severe case of delayed contact dermatitis (Type IV hypersensitivity) from wearing latex gloves. A severe case of delayed contact dermatitis (Type IV hypersensitivity) from wearing latex gloves.
Solar output Solar output
Effect of an Increase in gA,2 on Productivity and Output Effect of an Increase in gA,2 on Productivity and Output
Sensation Activity: Sight (1 of 2) Sensation Activity: Sight (1 of 2)
During a period of high power demand, the voltage output of the power company is reduced by ... During a period of high power demand, the voltage output of the power company is reduced by ...
Video: Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library