_______ tend to represent a major bottleneck in system performance.

• A. Cpus
• B. Disks
• C. Programs
• D. I/o

In UNIX, even an ’empty’ disk has a percentage of its space lost to ______

• A. Programs
• B. Inodes
• C. Virtual memory
• D. Stacks

By preallocating the inodes and spreading them across the volume, we ___________ the system performance.

• A. Improve
• B. Decrease
• C. Maintain
• D. Do not affect

____________ writes occur in the order in which the disk subsystem receives them, and the writes are not buffered.

• A. Asynchronous
• B. Regular
• C. Synchronous
• D. Irregular

In ___________ writes, the data is stored in the cache.

• A. Asynchronous
• B. Regular
• C. Synchronous
• D. Irregular

A file being read or written sequentially should not have its pages replaced in LRU order, because _____________

• A. It is very costly
• B. The most recently used page will be used last
• C. It is not efficient
• D. All of the mentioned

In the optimized technique for sequential access ___________ removes a page from the buffer as soon as the next page is requested.

• A. Write ahead
• B. Read ahead
• C. Free-behind
• D. Add-front

With _______ a requested page and several subsequent pages are read and cached.

• A. Write ahead
• B. Read ahead
• C. Free-behind
• D. Add-front

“When an attacker is able to eavesdrop on network traffic and identify the MAC address of a computer with network previleges.” Which type of Wireless network threat would you classify this under?

• A. Identity theft.
• B. MAN in the middle attack
• C. Network injection
• D. Accidental association

What is a valid size of the Group Temporal Key (GTK) in WEP?

• A. 40 bits
• B. 128 bits
• C. 512 bits
• D. 80 bits