answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Liono4ka [1.6K]
2 years ago
8

You need to design a data storage scheme for Hayseed Heaven library data system. There are several hundred thousand large data r

ecords. You expect frequent insertions/deletions as well as frequent queries, involving multiple attributes. There is no requirement for printing the file in order. You may assume the initial file is available sorted. The queries are in real time and primarily occur on the ISBN number, title, and author fields. There are occasional queries on the publisher and subject fields of the record. You may make reasonable assumptions about hardware availability. The entire system is archived monthly. What do you propose and why
Computers and Technology
1 answer:
Alekssandra [29.7K]2 years ago
7 0

Answer:

Make use of hash tables

Explanation:

The appropriate thing to use for this should be a hash table.

A Hash Table can be described as a data structure which stores data in an associative manner. In a hash table, data is stored in an array format, where each data value has its own unique index value. Access of data becomes very fast if we know the index of the desired data. So we can perform Hashing on ISBN Number since its unique and based on the Hash Function w ecan store the Information record.

There is no requirement for printing the file in order - HashTables dont store the data in order of insertions, so no problems with that

It becomes a data structure in which insertion and search operations are very fast irrespective of the size of the data. So Querying books details can be fast and searching will take less time.

It can also be pointed out that it wont be too expensive for Hardware implemtation as HashTables stores data based on Hash Functions and memory consumption is also optimal which reduces memory wastages.

You might be interested in
A bank in your town updates its customers’ accounts at the end of each month. The bank offers two types of accounts: savings and
Lerok [7]

Answer:

This is your corrected code and the output of each test example. I have also added comments with the provided code to make the code understandable. I have also changed itype variable to from int to String in order to print the account type (Savings or Checking) in output.

import java.util.*;

public class bank{  //class name

public static void main (String [] args)  //start of main function body

{int num,error=1; //declare variables

String itype=" "; //stores Checking or Savings account type

char type =0;  //type variable which is one of savings S or checking C

double min,cur =0,balance =0,rate=0;

//declare variables for minimum balance, current balance, interest rate

Scanner in=new Scanner(System.in);

System.out.println("Enter account number: ");  //prompts user to enter acc no

num=in.nextInt();  //reads input account number

while(error==1) {  

//asks user to enter account type C or S

System.out.println("Enter account type(s-savings or c-checking):");

type=in.next().charAt(0);  //reads the input character of account type

if(type=='c'||type=='C')  //if user inputs c or C

{itype= "Checking";  //set itype to Checking when user input c or C

error=0;  //set value of error to 0 means user entered valid type input

rate=3/100.; }  // Savings accounts receives  3% interest

else if(type=='s'||type=='S')  //if user enters S or s that shows Savings account

{itype= "Savings";  //set itype to Savings when user input s or S

error=0;  //set error to 0 means there is no error

rate=4/100.; }  //Savings accounts receives 4% interest

if(error==1)  //in case of error in giving input

System.out.println("Invalid type-re enter"); }  //asks user to input again

System.out.println("Enter minimum balance: ");  //asks user to enter min bal

min=in.nextDouble();  //reads value of input minimum balance

System.out.println("Enter current balance: ");

// reads value of input current balance

cur=in.nextDouble();

balance = cur;  

if(itype=="Checking") //if the account type is checking

{ if(cur>min+5000) //Checking accounts interest is 5%

{rate=5/100.;

cur=cur+rate*cur; //computes new balance

System.out.printf("New balance: $%.2f\n", cur);} //returns new balance value

/*If a customer’s balance falls below the minimum balance, there is a service charge of $25.00 for checking accounts */

else if(cur<min)

{cur-=25;

System.out.printf("New balance: $%.2f\n", cur);} returns the value of new

}

if(itype=="Savings"){ //if account type is Savings

/*If a customer’s balance falls below the minimum balance, there is a service charge of $10.00 for savings accounts */

if(cur<min)

{cur-=10;

System.out.printf("New balance: $%.2f\n", cur);}

else

//Savings accounts receive 4% interest

{cur=cur+rate*cur;

System.out.printf("New balance: $%.2f\n", cur);}}

/* as the program should output account number, account type, current balance, and new balance so i have commented out the extra print statements below */

//System.out.printf("After interest and fees your balance is = $%.2f\n",cur);

System.out.println("Account Number: " + num);

System.out.println("Account type: " + itype);

System.out.printf("Current balance: $%.2f\n ", balance);  //the result is //displayed up to 2 decimal place .2f   } }

Explanation:

Following is the output of each test example:

46728 S 1000 2700

Account Number: 46728                                            

Account type: Savings                                                                                          

Current balance: $2700.00                                                                                

New balance: $2808.00

87324 C 1500 7689

Account Number: 87324                                                                                      

Account type: Checking                                                                                        

Current balance: $7689.00                                                                                  

New balance: $8073.45

79873 S 1000 800

Account Number: 79873                                                                                    

Account type: Savings                                                                                        

Current balance: $800.00  

New balance: $790

89832 C 2000 3000

Account Number: 89832                                                                                      

Account type: Checking                                                                                        

Current balance: $3000.00                                                                                  

New balance: $3090.00

98322 C 1000 750  

Account Number: 98322

Account Type: Checking  

Current balance: $1000.00

New Balance: $725.00

7 0
2 years ago
How efficient would a 6-bit code be in asynchronous transmission if it had 1 parity bit, 1 start bit, and 2 stop bits?
Lana71 [14]
How efficient well if we are transmitting 6bits and we need 10 to transmit the 6 bits that would be 6/10 = .6 = 60% efficient.
7 0
1 year ago
A school principal trying to find out if parents will help buy new playground equipment shows digital leadership by.
ELEN [110]

Answer:

D. is the correct answer!

8 0
2 years ago
Read 2 more answers
Justify the statement "The same job title can have different job roles and different qualification criteria in different organiz
Lana71 [14]

Answer:

Below is an executive summary of this particular issue.

Explanation:

  • Each organization has differential requirements and preferences. This same employment opportunities rely heavily on either the structure of the company and indeed the amount of equipment that it possesses.
  • Hence, whenever they recruit an individual on a specific job, their work description can differ based on the organization's needs including growth.
4 0
2 years ago
An array of ints, arr, has been declared and initialized. Write the statements needed to reverse the elements in the array. So,
Yuki888 [10]

Answer:

The sample output is below.

The code is attached.

Explanation:

Sample Output:

Original array is: 1 2 457 4 Reversed array is: 4754 2 1

Code to copy:

import java.io.*;

class Main

{

    /*Define the function revArray passing the array

      and its indices.*/

    static void revArray(int arr[], int start, int end)

    {

         /*Declare an integer variable to store the

           first index.*/

         int temp;

         //Check if array is empty.

         if (start >= end)

             return;

         //Store the first index value.

         temp = arr[start];

         //Swap the last index to first index.

         arr[start] = arr[end];

         //Store the temp value to last index.

         arr[end] = temp;

         /*Call the function recursively to swap

           rest of the values.*/

         revArray(arr, start+1, end-1);

    }  

    public static void main (String[] args)

    {

         //Declare and initialize array.

         int[] arr = {1,2,4,5,7,4};

         /*Declare an integer variable to store the

         * length of array.

         */

         int count=0;

         //Set the length of array to count.

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

             count++;

         System.out.println("Original array is:");

         ///Print the original array.

         for(int i=0; i<count;i++)

         {

             System.out.print(arr[i]+" ");

         }  

         /*Call the function to reverse the values in

         * the array itself.

         */

         revArray(arr, 0, count-1);

         System.out.println("\nReversed array is:");

         ///Print the reversed array.

         for(int i=0; i<count;i++)

         {

             System.out.print(arr[i]+" ");

         }  

    }

}

5 0
2 years ago
Other questions:
  • Gloria needs to show in spreadsheet form the number of students in her class who speak different languages. Which type of graph
    7·1 answer
  • Which data type stores images and audio visual clips?
    15·1 answer
  • Write a program in c or c++ to perform different arithmeticoperation using switch statement .the program will take two inputinte
    10·1 answer
  • Software as a Service (SaaS) refers to the use of computing resources, including software and data storage, on the Internet rath
    13·1 answer
  • Print "userNum1 is negative." if userNum1 is less than O. End with newline Convert userNum2 to 0 if userNum2 is greater than 8.
    10·1 answer
  • A triangular number is a number that is the sum of the integers from 1 to some integer n. Thus 1 is a triangular number because
    11·1 answer
  • Chris accidentally steps on another student’s foot in the hallway. He apologizes, but the other student does not want to hear it
    13·2 answers
  • What does the binary odometer show about representing large numbers​
    15·1 answer
  • When considering server consolidation, plan on running ___________ vCPUs per core.a. 1 to 2b. 3 to 4c. 4 to 6d. 6 to 8
    7·1 answer
  • Describe the output when the following code executes in 64-bit mode: .data dividend_hi QWORD 00000108h dividend_lo QWORD 3330002
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!