Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?
A). Nonrepeatable read
B). Dirty read
C). Dirty read
D). Consistent read
2. What could cause a fixed disk error?
4. What could cause a fixed disk error.
6. The difference between a high-technology and a medium-technology robot is the:
8. Data communications system depends on four fundamental characteristics
9. Which command is used to remove a file?
10. What is the turns ratio for the transformer specified in the above question?