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iren2701 [21]
3 years ago
8

When looking at a relationship between two tables on an ERD, the _____ table can be identified by the presence of a foreign key

constraint.
a) parent
b) child
c) lookup
d) value
Computers and Technology
1 answer:
Mariulka [41]3 years ago
6 0

Answer:

A

Explanation:

ERD diagram is a diagram which can illustrate the relation ships between different entities in a database. When we are referring the values of parent table in child table ,then a foreign key constraint will exist on child table to the parent table.so by looking at that foreign key constraint on child table we can identify the parent table. If we try to insert some value in child table which doesn't exist in parent table it will throw the foreign key violation error .

The Answer is A

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We begin with a computer implemented in a single-cycle implementation. When the stages are split by functionality, the stages do
Anika [276]

Answer:

3.1 ns ; 1.25 ; 3.097

Explanation:

Given :

IF, 3 ns;

ID, 2.5 ns;

EX, 2 ns;

MEM, 3 ns;

WB, 1.5 ns.

Use 0.1 ns for the pipelineregisterdelay

maximum time required for MEM = 3 ns

Pipeline register delay = 0.1 ns.

Clock cycled time of the pipelined machine= maximum time required + delay

3ns+0.1 ns = 3.1 ns

2.) for stall after every 4 instruction :

CPI of new machine :

(1 + (1 /4)) = 1 + 0.25 = 1.25

3.)

The speedup of pipelined machine over the single-cycle machine is given by :

Average time per instruction of single cycle ÷ average time per instruction of pipelined

Clock time of original machine = 12ns

Ideal CP1 = 1

CPI of new machine = 1.25

Clock period = 3.1 ns

(12 * 1) / (1.25 * 3.1) = 12 / 3.875

= 3.097

D. Speed up will equal the number of stages in the machine

8 0
3 years ago
A user saves a password on a website the user logs into from a desktop. Under which circumstances will the password be saved on
9966 [12]

Answer:

Same Browser

Explanation:

If we access some password for some website in from some computer. It will be saved in the browser of the computer. Whenever we access the website from some other computer and we want to login we need the same browser.

In this process, browser is sync by using our mailing address. Whenever we want to access the pasword of different website from some other device, we need to sync that device browser with the same mailing address.

In this process all password that are saved on other device may access from any device.

7 0
3 years ago
The international system of units is very important to our worldwide science community because it is easier for scientists to sh
Olenka [21]
Units and prefixes are created and unit definitions are modified through international agreement as the technology of measurement progresses and the precision of measurements improves.
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1 year ago
What happens to formulas with relative cell references when they are copied using the fill handle?
Masteriza [31]
The correct answer is D
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4 years ago
Which of the following is true of how packets are sent through the Internet?
astra-53 [7]

Answer:

It is A: Packet metadata is used to route and reassemble information travelling  through the internet.

Explanation:

Step 1: The Internet works by chopping data into chunks called packets. Each packet then moves through the network in a series of hops. Each packet hops to a local Internet service provider (ISP), a company that offers access to the network -- usually for a fee

Step 2: Entering the network

Each packet hops to a local Internet service provider (ISP), a company that offers access to the network -- usually for a fee.

Step 3: Taking flight

The next hop delivers the packet to a long-haul provider, one of the airlines of cyberspace that quickly carrying data across the world.

Step 4: BGP

These providers use the Border Gateway Protocol to find a route across the many individual networks that together form the Internet.

Step 5: Finding a route

This journey often takes several more hops, which are plotted out one by one as the data packet moves across the Internet.

Step 6: Bad information

For the system to work properly, the BGP information shared among routers cannot contain lies or errors that might cause a packet to go off track – or get lost altogether.

Last step: Arrival

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8 0
3 years ago
Read 2 more answers
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