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Iteru [2.4K]
3 years ago
5

The logical view of a database system refers tohow a user or programmer conceptually organizes and understands the data. how the

DBMS accesses data for a certain application program. how and where the data are physically arranged and stored. how master files store data values used by more than one application program.
Computers and Technology
1 answer:
Leona [35]3 years ago
7 0

Answer: How a user or programmer conceptually organizes and understands the data.

Explanation:

  • The logical view is one of the type of view in the database system that provide some logical concept to the user of the database management system which include the state diagram, UML and the class diagram.
  • In the database system, each user posses their own logical view on the basis of the specific task and function and it also helps in maintain the database system in an organization.    

According too the given question, the logical view is basically refers to the programmers or any user is typically understand the given data and conceptually organize the data in logical manner in the database management system.

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Write a bool function isPalindrome that takes one string parameter and returns true if that string is a palindrome and false oth
kkurt [141]

Answer:

Here is the bool function isPalindrome:

bool isPalindrome(string s)

{  bool palindrome;      

 int j;

 int len = s.length();

 for (int i =0, j= len-1; i < len/2; i++, j--)  

   if (s[i] == s[j])

     palindrome = true;  

   else

     palindrome = false;

 return palindrome; }

Explanation:

The bool function isPalindrome takes a string as parameter and returns true if the string is a palindrome or false if the string is not palindrome. The string variable s holds the string value. In function isPalindrome, there is a bool type variable palindrome. bool is a data type which is used to hold values true or false which is then stored in the palindrome variable.

Next it is being found that how many characters are there in the input string using length() function which returns the length of the string. The length of the string is stored in int type variable len.

Next the for loop starts which has two variables i and j where i starts at 0 position of the input string and j starts at the last position of the string. These two variables move or traverse along the string this way. i variable stops when half the length of the input string is reached. At the end of every iteration i moves forward by the increment of its value to 1 and j moves backwards by the decrement  of its value to 1.

Every the body of  the loop executes, there is an if condition in the body of the loop which checks if the string is a palindrome. This is checked by matching the character at position/index i with the character at position j of the string. This will continue character by character until the i reached half the length of the input string and if every character in i was matched to every character in j then palindrome = true; statement is executed which returns true as the string is a palindrome otherwise palindrome = false; is returned as the string is not a palindrome.

For taking input string from the user and to check if the function isPalindrome() works correctly a main() function is written which takes input string from the user and reads in variable str calls isPalindrome() function. If the string is palindrome then the cout statement in main() function prints the message: String is a palindrome and if the input string is not a palindrome the the following message is displayed in the output screen: String is not a palindrome

int main()

{

string str;

cout<<"Enter a string: ";

cin>>str;

if(isPalindrome(str))

cout<<"String is a palindrome";

else

cout<<"String is not a palindrome";

}

The screenshot of the program along with the output is attached.

7 0
3 years ago
Design (draw a datapath) for a block that will help your processor decide whether to take a branch for different conditions. As
LekaFEV [45]

Answer:

See explaination

Explanation:

Here are the steps taken to draw the diagram!

opcode0 and the opcode1 signals are inverted/not to determine the case whether it is 00, 01, 10, 11.

Then they are 'and'ed with the corresponding Zero/lt signal to confirm if the case is true, for eg. zero = 1 if opcode = 00 (beq).

Then all the cases are 'or'ed to get the Branch signal!

See attachment for the diagram

8 0
3 years ago
What is the main function of an operating system​
alina1380 [7]

Here are the main functions of an operating system:

1) Manage the resources of the device

The operating system controls how much of each resource is distributed, and it controls things like the processing unit and memory.

2) Establish a interface for the user of the device

The operating system must classify what the classes of the script/code have to do and what they implement.

3) Service application software

The operating system must service each application that is downloaded onto the device. It must balance it's use of storage between apps.

4 0
3 years ago
Stock ____ firms trade financial securities between a buyer and a seller.
diamong [38]
<span>Stock market firms, also known as brokerage firms, assist in the act of buying and selling financial securities. These trades are financed through financial institutions for security.</span>
3 0
3 years ago
The ____ of a variable is the location in memory where it’s value is stored. A. Value B. Address C. Data type D. Number
fomenos

Answer: C. Data type

Explanation:

data types are defined as the data storage format that a variable can store a data to perform a specific operation. Data types are used to define a variable before its use in a program. Size of variable, constant and array are determined by data types.

3 0
3 years ago
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