« previous next »

Author Question: What is the difference between shared locks and exclusive locks? What will be an ideal ... (Read 135 times)

jazziefee

  • Hero Member
  • *****
  • Posts: 505
on: Jul 7, 2018
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
Modern Database Management ¦ Hoffer, Venkataraman, Topi ¦ 13th Edition
Buy Test-Bank


rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 7, 2018
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

jazziefee

  • Hero Member
  • *****
  • Posts: 505
Reply #2 on: Jul 7, 2018
Thank you :)


rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 7, 2018
Happy to help you


« previous next »
 

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

John Lewis Krimmel’s painting of the Fourth of July in Centre Square Philadelphia (1812) shows the d John Lewis Krimmel’s painting of the Fourth of July in Centre Square Philadelphia (1812) shows the d
Difference between chromosomes, chromatids, and chromatins Difference between chromosomes, chromatids, and chromatins
Multigroove adjustable pliers are known by many names, including the trade name Channel Locks®. Multigroove adjustable pliers are known by many names, including the trade name Channel Locks®.
Sensitivity study for facial difference Sensitivity study for facial difference
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
An electron is accelerated from rest through a potential difference of 3750 V. It enters a ... An electron is accelerated from rest through a potential difference of 3750 V. It enters a ...
Video: Renal Failure

For a complete list of videos, visit our video library