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Artyom0805 [142]
3 years ago
15

The _____ helps the project team to identify the main functions or features of the system and the different users or external sy

stems that will interact with the system.
Computers and Technology
1 answer:
mamaluj [8]3 years ago
5 0
<h2>Answer:</h2>

Use case diagram

<h2>Explanation:</h2>

A use case diagram is one of the dynamic diagrams used in Unified Modelling  Language (UML). It is used to illustrate the set of actions, services, tasks and functions that a system needs to perform and those to be performed on the system.  Use case diagrams help team members of a project to identify the main functions or features of the system as well as users and external systems that will interact with the system.

Use case diagrams have the following features;

(i) System: to depict the application itself. It is represented using a rectangular box.

(ii) Use case: to represent the system's functionalities. It is represented using an oval shape.

(iii) Actors: to represent the users of the system.

(iv) Relationships: to illustrate the relations between the actors and the use case of the system.

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True or false? a router is a network device that directs packets over a network towards their final destination.
Alex_Xolod [135]

A router is a web device that directs packages over a web towards their final destination is true.

<h3>What is the router?</h3>
  • A router is a machine that combines two or more packet-switched grids or subnetworks.
  • A router accepts and data transmits  on computer networks. Routers are sometimes confused with network hubs, modems, or network controllers.
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1 year ago
Is recursion ever required to solve a problem? What other approach can you use to solve a problem that is repetitive in nature?
Setler79 [48]

Answer:

No you can not tell that recursion is ever required to solve a problem.

Recursion is required when in the problem, the solution of the input depends on the solution of the subsets of the input.

Iteration is also another form of repetitive approach we follow to solve that kind of problems.

But the difference between recursion and iteration is :

  • In recursion we call the function repeatedly to return the result to next level.
  • In iteration certain bunch of instructions in a loop are executed until certain conditions met.

Explanation:

For example in the Fibonacci sequence problem, to find f_{n}, we need to compute f_{n-1} and f_{n-2} before that.

  • In case of recursion we just call the method Fibonacci(n) repeatedly only changing the parameter Fibonacci(n-1), that calculates the value and return it.

                           Fibonacci(n)

                           1. if(n==0 or n==1)

                           2.       return 1.

                           3.else

                           4.      return( Fibonacci(n-1)+Fibonacci(n-1) )

  • But in case of iteration we run a loop for i=2 to n, within which we add the value of current f_{i-1} and f_{i-2} to find the value of f_{i}

                           Fibonacci(n)

                           1. if(n<=2)

                           2.    result = 1

                           3.     else

                           4. result1 =1 and result2=1.

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                           7.         result2 = result.

                           8.      }

                           9.  output result.

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