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Akimi4 [234]
3 years ago
7

Consider an entity set Person, with attributes social security number (ssn), name, nickname, address, and date of birth(dob). As

sume that the following business rules hold: (1) no two persons have the same ssn; (2) no two persons have he same combination of name, address and dob. Further, assume that all persons have an ssn, a name and a dob, but that some persons might not have a nickname nor an address.
A) List all candidate keys and all their corresponding superkeys for this relation.
B) Write an appropriate create table statement that defines this entity set.
Computers and Technology
1 answer:
lisov135 [29]3 years ago
4 0

Answer:

\pi

Explanation:

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You are going to write a program for Computer test which will read 10 questions from a file, order them randomly and provide the
ollegr [7]

Answer:

from pprint import pprint

import random

match = {

   "mcq1": "a",

   "mcq2": "c",

   "mcq3": "c",

   "mcq4": "d",

   "mcq5": "a",

   "mcq6": "a",

   "mcq7": "a",

   "mcq8": "b",

   "mcq9": "d",

   "mcq10": "a"

}

file = open("test","r")

questions = set()

for i in range(10):

   ques = []

   for line in file:

       if "-" in line:

           break

       else:

           ques.append(line)

   questions.add(tuple(ques))

def quiz(questions, match):

   questions = list(questions)

   marks = 0

   for i in range(10):

       pprint(questions[i])

       mcq = "mcq",str(i+1)

       mcq = list(mcq)

       answer = input("enter your answer: ")

       if answer == match["".join(mcq)]:

           marks += 1

   return marks

print("Your score is: ",quiz(questions, match))

Explanation:

the file which has been loaded is test, and its data is provided below...

mcq1. The device which converts analog signals to digtital signals and vice versa is called.

a) mother board

b) TAP

c) Modem

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mcq2. The main components of a computer system are.

a) TAP, CPU, Printer

b) CPU, Input device

c) CPU, ALU, CU

d) CPU , Output device , Memory unit, Control unit

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mcq3. A source program is a program.

a) writter in machine laguage

b) translated in machine langaue

c) written in high level language

d) required to boot a computer

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mcq4.Which image format supports transparency in images.

a) PNG

b) GIF

c) JPG

d) A & B

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mcq5. (10111) 2 = (?) 10.

a) 23

b) 50

c) 24

d) 89

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mcq6. UNICODE is an example of.

a) character encoding set

b) driver

c) software

d) database

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mcq7. (10111) 2 = (?) 10.

a) 23

b) 50

c) 24

d) 89

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mcq8. NTFS stand for.

a) Network File Saving

b) New Technology File System

c) Newt Trend File Saving

d) Non Technology File System

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mcq9. FF is example of.

a) Octal number system

b) Binary Number System

c) Decimal Number System

d) Hexadecimal number system

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mcq10. Emails are sent with the help of ?

a) SMTP

b) FTP

c) HTTP

d) UDP

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Answer:

You must attach the database files

Explanation:

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Practice!
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