Author Question: What is the difference between shared locks and exclusive locks? What will be an ideal ... (Read 123 times)

jazziefee

  • Hero Member
  • *****
  • Posts: 505
What is the difference between shared locks and exclusive locks?
 
  What will be an ideal response?

Question 2

Polymorphism occurs when the same operation may apply to two or more classes in different ways.
 
  Indicate whether the statement is true or false


rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

Shared locks allow other transactions to read but not update a record or other resource. This is most useful when preventing another user from placing a lock on a record. An exclusive lock prevents another transaction from reading and writing a record until an update is done by the transaction that locked the record.

Answer to Question 2

TRUE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

The average adult has about 21 square feet of skin.

For a complete list of videos, visit our video library