UGC NET Computer Science : June 2012 – Paper 2 (Solved Papers)admin
B+ tree are preferred to binary tree in Database because
Disk data transfer rates are much less than memory data transfer rate
Disk access is much slower than memory access
Disks are more reliable than memory
Disk capacity are greater than memory capacities
A Transaction Manager is which of the following ?
Maintains appropriate concurrency control
All of the above
Maintains a log of transactions
Maintains before and after database images
Leaves of which of the following trees are at the same level ?
Which of the following TCP/IP Internet protocol is diskless machine uses to obtain its IP address from a server ?
Decryption and encryption of data are the responsibility of which of the following layer ?
Data Link layer