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tester [92]
3 years ago
6

A university wants to schedule the classrooms for final exams. The attributes are given below:

Computers and Technology
1 answer:
iVinArrow [24]3 years ago
5 0

Answer:

See explaination

Explanation:

Clearly the entities are as follows:-

Course

Section

Room

Test

The relationship among entities are as follows:-

Course has Section

Test is conducted for Course

Test is conducted in Section

Test is conducted in Room

Attributes of each entities are as follows:-

Course (CourseID, Name, Department)

Section (SectionID, Enrollment)

Room (RoomNumber, Capacity, Building)

Test (Time)

Section is a week entity as, there may be same sections for different courses, therefore section uses the primary key of course entity as foreign key.

Also entity Test is dependent upon the entities Room,Section and Course, therefore primary keys of these entities will be used as foreign key in the Test entity.

Check attachment for the ER diagram

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Answer:

File size  

25  GB  

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Modem     56,6 kbit/s                         1065:13:12

ADSL       256 kbit/s                         233:01:00

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ADSL             2 Mbit/s                                     29:49:34

ADSL             8 Mbit/s                                     07:27:23

ADSL             24 Mbit/s                                     02:29:07

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Hopefully this helps somewhat

7 0
3 years ago
Read 2 more answers
The user enters a URL into a web browser, the web browser sends the information to the DNS server to look up the IP address, the
Olegator [25]

Answer:

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Explanation:

6 0
3 years ago
The energy used by an appliance which operates at 240 volts at 15 amp for 4 hr. is A. 0.92 kwhr. B. 3.45 kwhr. C. 14.4 kwhr. D.
Tju [1.3M]

Answer:

C. 14.4 kwhr.

Explanation:

To calculate the energy used by appliance first calculate the power. The formulae for calculating power(<em>P</em>) is P= I \times V, where V stands for voltage and I stands for current.

In the given problem,  V = 240 volts and I = 15 amp. Therefore,

P=240 \times 15 =3600\ watt(w) = 3.6\ kw

Now, formulae for calculating energy used i.e. work(W) is W = P\times t, where <em>t</em> is the time.

In the given question time is 4 hr. Therefore energy used will be,

Energy used (W) = 3.6\times4 =14.4\ kwhr.

8 0
4 years ago
What operating system are you using? On most computers, you can answer this question by right-clicking on the "My Computer" icon
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5 0
3 years ago
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3. A vulnerability is: a. A hacker searching for open ports b. A known attack method c. An incorrectly implemented policy d. All
ELEN [110]

Answer:

A

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A hacker searching for open ports denotes vulnerability of computer (to hacking).

Cheers

7 0
3 years ago
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