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natta225 [31]
4 years ago
15

Create a class called Minimum that provides a single class method min. min should take an array of any object that implements Co

mparable and return the minimum value from the array, using compareTo to compare object instances. So the function signature of min should be public static Comparable min(Comparable[] values) As a reminder, first.compareTo(second) returns a positive value if first is larger than second, a negative value if first is smaller than second, and O if they are equal. Note that the array of Comparable references passed to min will all be the same type and contain no null references. However, the array may be null or empty in which case you should return nul1 Note that the warning about unchecked or unsafe operations is normal and not a sign that you did something wrong. We'll discuss this soon in class.) Minimum.java
Computers and Technology
1 answer:
kaheart [24]4 years ago
7 0

Answer:

The required code is given below:

Explanation:

public class Minimum {

   public static Comparable min(Comparable[] values) {

       if (values == null || values.length == 0) {

           return null;

       } else {

           Comparable minValue = values[0];

           for (int i = 0; i < values.length; i++) {

               if (values[i].compareTo(minValue) < 0) {

                   minValue = values[i];

               }

           }

           return minValue;

       }

   }

}

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[1] Please find all the candidate keys and the primary key (or composite primary key) Candidate Key: _______________________ Pri
AVprozaik [17]

Answer:

Check the explanation

Explanation:

1. The atomic attributes can't be a primary key because the values in the respective attributes should be unique.

So, the size of the primary key should be more than one.

In order to find the candidate key, let the functional dependencies be obtained.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing ->  Emp_ID

Course_ID -> Course Name

Course_Name ->  Course_ID

Date_Completed -> Course_Name

Closure of attribute { Emp_ID, Date_Completed } is { Emp_ID, Date_Completed , Name, DeptID, Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { Name , Date_Completed } is { Name, Date_Completed , Emp_ID , DeptID, Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { DeptID, Date_Completed } is { DeptID, Date_Completed , Emp_ID,, Name, , Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { Marketing, Date_Completed } is { Marketing, Date_Completed , Emp_ID,, Name, DeptID , Salary, Course_Name, Course_ID}.

So, the candidate keys are :

{ Emp_ID, Date_Completed }

{ Name , Date_Completed }

{ DeptID, Date_Completed }

{ Marketing, Date_Completed }

Only one candidate key can be a primary key.

So, the primary key chosen be { Emp_ID, Date_Completed }..

2.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing ->  Emp_ID

Course_ID -> Course Name

Course_Name ->  Course_ID

Date_Completed -> Course_Name

3.

For a relation to be in 2NF, there should be no partial dependencies in the set of functional dependencies.

The first F.D. is

Emp_ID -> Name, DeptID, Marketing, Salary

Here, Emp_ID -> Salary ( decomposition rule ). So, a prime key determining a non-prime key is a partial dependency.

So, a separate table should be made for Emp_ID -> Salary.

The tables are R1(Emp_ID, Name, DeptID, Marketing, Course_ID, Course_Name, Date_Completed)

and R2( Emp_ID , Salary)

The following dependencies violate partial dependency as a prime attribute -> prime attribute :

Name -> Emp_ID

DeptID -> Emp_ID

Marketing ->  Emp_ID

The following dependencies violate partial dependency as a non-prime attribute -> non-prime attribute :

Course_ID -> Course Name

Course_Name ->  Course_ID

So, no separate tables should be made.

The functional dependency Date_Completed -> Course_Name has a partial dependency as a prime attribute determines a non-prime attribute.

So, a separate table is made.

The final relational schemas that follows 2NF are :

R1(Emp_ID, Name, DeptID, Marketing, Course_ID, Course_Name, Date_Completed)

R2( Emp_ID , Salary)

R3 (Date_Completed, Course_Name, Course_ID)

For a relation to be in 3NF, the functional dependencies should not have any transitive dependencies.

The functional dependencies in R1(Emp_ID, Name, DeptID, Marketing, Date_Completed) is :

Emp_ID -> Name, DeptID, Marketing

This violates the transitive property. So, no table is created.

The functional dependencies in R2 (  Emp_ID , Salary) is :

Emp_ID -> Salary

The functional dependencies in R3 (Date_Completed, Course_Name, Course_ID) are :

Date_Completed -> Course_Name

Course_Name   ->  Course_ID

Here there is a transitive dependency as a non- prime attribute ( Course_Name ) is determining a non-attribute ( Course_ID ).

So, a separate table is made with the concerned attributes.

The relational schemas which support 3NF re :

R1(Emp_ID, Name, DeptID, Course_ID, Marketing, Date_Completed) with candidate key as Emp_ID.

R2 (  Emp_ID , Salary) with candidate key Emp_ID.

R3 (Date_Completed, Course_Name ) with candidate key Date_Completed.

R4 ( Course_Name, Course_ID ).  with candidate keys Course_Name and Course_ID.

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व्याख्या c) Differentiate between Raster Image and Vector Image.​
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Vector images are described by lines, shapes, and other graphic image components stored in a format that incorporates geometric formulas for rendering the image elements

These are the types of images that are produced when scanning or photographing an object. Raster images are compiled using pixels, or tiny dots, containing unique color and tonal information that come together to create the image.

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Since the 1960s, there have been five major generations, or cycles, of computing. Which represents those generations in order?
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Answer:a) Mainframes, miniframes, PCs, desktop Internet computing, mobile computing

Explanation: The hierarchy of the computers or computing are in the generation is:-

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  • Miniframe:-has similar functioning as the mainframe but on smaller scale and version.
  • Personal computer(PC):-It is designed for the individual purpose and according the need of the user.
  • Mobile computing:-computing that can be done on the mobile phone similar to the computing on the personal computer
  • Internet computing:-the computing of the mobile and computer system with the facility of the internet connectivity.

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3 years ago
Which option re-scales a worksheet vertically?
Brrunno [24]
Rescaling or if that didn’t help use quicker
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Why must programs written in a high-level language be translated into machine language?
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The only thing that a computer actually understands is machine language. English-like constructs are gibberish to a computer, so they need to be translated by a compiler to machine language to run natively.
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