question 6: If all locking operations, both read locks and write locks, are completed before the first unlock operation is executed, the general protocol being followed is : A) read/write locking B) two -phase locking C) a lock table D) timestamp locking E) binary locking Question 7: To recover a table which has been highly damaged or even destroyed, you use the most recent backup copy and the journal to perform a procedure called: A) restore B) slow -recover C) roll - forward D) roll - backed E) quick recover
question 6: If all locking operations, both read locks and write locks, are completed before the first unlock operation is executed, the general protocol being followed is : A) read/write locking B) two -phase locking C) a lock table D) timestamp locking E) binary locking Question 7: To recover a table which has been highly damaged or even destroyed, you use the most recent backup copy and the journal to perform a procedure called: A) restore B) slow -recover C) roll - forward D) roll - backed E) quick recover
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Can you answer these two questions that I don't understand:
question 6: If all locking operations, both read locks and write locks, are completed before the first unlock operation is executed, the general protocol being followed is :
A) read/write locking
B) two -phase locking
C) a lock table
D) timestamp locking
E) binary locking
Question 7: To recover a table which has been highly damaged or even destroyed, you use the most recent backup copy and the journal to perform a procedure called:
A) restore
B) slow -recover
C) roll - forward
D) roll - backed
E) quick recover
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