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Dafna1 [17]
3 years ago
6

Every record in a table in a database must have a​ ____________ which is a column or group of columns that identifies a unique r

ecord in the table.
a. folder
b. field
c. descriptor
d. metadata
e. key
Computers and Technology
1 answer:
poizon [28]3 years ago
5 0
Every record in a table in a database must have a​ key(Primary Key PK) or group of keys (/Composite key) that uniquely identify that record.
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What is one advantage of inserting a page number field in your document instead of inserting the actual page number?
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In java please
Sidana [21]

Answer:

Explanation:

The following code is written in Java. It is a static method that takes in a String parameter and loops through the String array called arr comparing each element in the array with the word parameter that was passed. If it finds a match the method returns the index of that word, otherwise it will return -1

  public static int findString(String word){

               int index = -1;

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

                       if (word == arr[x]) {

                               index = x;

                               break;

                       }

               }

               

               return index;

               

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7 0
3 years ago
)what item is at the front of the list after these statements are executed?
White raven [17]

Answer:

Option (a) : sam

Explanation:

  • In the given program, the queue is defined in the first step.
  • The method addToFront() adds the given element to the front of the queue. After this step is executed the front element in the queue is that element.
  • The method addToBack() adds the given element to the back of the queue. After this step is executed the back element in the queue is that element.
  • After step 1, Jack is added to the front of the queue.
  • After step 2, Rudy is added to the back of the queue.
  • After step 3, Larry is added to the back of the queue.
  • After step 4, sam is added to the front of the queue.
  • After step 5, name contains Larry as the getBack() returns the element present at the back of the queue.
  • After step 6, Adam is added to the back of the queue.
  • After executing all of the steps now the queue contains "sam" as the front element of the queue.
  • So, the correct option is "sam".
3 0
3 years ago
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