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netineya [11]
3 years ago
11

You receive a phone call from a co-worker telling you that "the network is down." Just as you are about to look into the issue,

you receive several more phone calls from other co-workers. Using the problem-solving process, what must be done first to effectively troubleshoot the issue?
Computers and Technology
1 answer:
Dvinal [7]3 years ago
5 0

This issue will happen mostly if cellular network will not be down, or suppose if cellular network is down mostly, or it will be rainy or a current cutoff issue might be occurred.

<u>Explanation:</u>

The following step to be made for trouble shoot his phone when cellular network is down.

1. Restart the mobile:- After restarting kindly check mobile connectivity.

2. Check for mobile air plane mobile and make sure the mobile phone is not in air plane mode.

3. Check the income and outgoing vapidity.

4. Switch off the mobile, Remove service provider sim card from mobile and reinsert the sim card and start the mobile.

5. Still connectivity problem, either contact the service provider or replace with new sim card.

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Answer:

B

Explanation:

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Consider the following schema for customer: (id, name, street, city, state, zip, phone), in which customers are uniquely determi
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Answer:

Super key is a set of attributes that uniquely identifies all attributes in a relation.Super keys are more than candidate key.

Explanation:

For example in the given schema where

Customer: (id , name , street , city,state,zip,phone)

We have a relation we check super keys by following dependencies

Functional Dependencies                          Super Key

id                                                                     YES

name                                                               YES

id , name -> street , city,state,zip,phone       YES

id , street  ->name , city,state,zip,phone       YES

id,city ->name , street ,state,zip,phone         YES

id,state ->name , street ,city,zip,phone         YES

id,phone  ->name , street ,state,zip,city        YES

id , name , street                                             YES

id , name , street , city                                    YES

id , name , street , city,state                          YES

id , name , street , city,state,zip,phone         YES

All these are uniquely identified

All these are super key but in reverse they are not super key such as

street , city,state,zip,phone->id , name        No

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