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Which object may be used during query optimization to improve the performance for a subset of SELECT queries?（）
A . MQT
B . Trigger
C . Read Only Cursor
D . Stored Procedure
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You are tuning RMAN to optimize performance.You want tape I/O to be asynchronous when you perform tape backups. Which action should you take?（）
A . Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE
B . Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE
C . Use compression when performing tape backups
D . Configure multiple SBT channel
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You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual ringtopology？（）
A . Dynamic Trunking Protocol
B . Resilient Packet Ring
C . Synchronous Digital Hierarchy
D . Coarse Wave Division Multiplexing
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To keep performance optimal on a lightweight access point，what can be done？（）
A . disable auto rf and configure manually.
B . disable all 802.11b data rates.
C . power access point to full power.
D . hard code the channel.
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You are tuning RMAN to optimize performance. You want tape I/O to be asynchronous when you perform tape backups. Which action should you take？（）
A . Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE
B . Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE
C . Use compression when performing tape backups
D . Configure multiple SBT channel
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A customer has a file server with RAID-5 using 8KB random I/Os， with 67% reads and 33% writes. How should the disk controller cache be configured for optimal performance？（）
A . Use write-back cache
B . Use write-back cache with battery backup
C . Use write-through cache with disk caching enabled
D . Use write-through cache with disk caching disabled
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When optimizing a standalone point-to-multipoint bridge installation with eight non-root bridges，which of the following RTS threshold and CWmin settings would be correct for the non-root bridges？（）
A . RTS threshold = 1，CWmin = 4
B . RTS threshold = 4000，CWmin = 5
C . RTS threshold = 4000，CWmin = 3
D . RTS threshold = 1，CWmin = 5
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Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual （counter-rotating） ring topology？（）
A . DTP
B . RPR
C . SDH
D . CWDM
E . DWDM
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For which of the following is a data warehouse optimized?（）
A . Backup and recovery
B . Transactions
C . Security
D . Querie
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Refer to the exhibit.
Which protocol establishes an optimal path to the root in a wireless mesh network？ （）
https://assets.asklib.com/images/image2/2018073011454335678.jpg
A . Adaptive Wireless Path （AWP）
B . WLAN Quality of Service （WQoS）
C . Lightweight Access Point Protocol （LWAPP）
D . 802.1Q WLAN trunking protocol
E . Layer 2 Roaming （IAPP）
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When separating lube oil separator, the optimal separating quantity is（）of the rated quantity on name plate.
A . 100%
B . 1/2
C . 1/5
D . 1/3
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You work as a database administrator for Certkiller .com. In your database server， the parameter PLSQL_OPTIMIZE_LEVEL has been set to 2. What would this setting achieve？（）
A . It degrades the run time and compiler performance.
B . It provides better run time and compiler performance.
C . It provides better optimization of the statement during parse time.
D . It forces the rule based optimizer to be used for statement optimization.
E . It provides better run time performance but slightly degraded compiler performance.
F . It provides better run time performance but slightly degraded run time performance.
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You need to select a class that is optimized for key-based item retrieval from both small and large collections. Which class should you choose？（）
A . OrderedDictionary class
B . HybridDictionary class
C . ListDictionary class
D . Hashtable cla
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When optimizing a standalone point-to-multipoint bridge installation with eight non-root bridges. Which of the following rts threshold and cwmin settings would be correct for the non-root bridges？（）
A . rts threshold=4000，cwmin=3
B . rts threshold=1，cwmin=4
C . rts threshold=4000，cwmin=5
D . rts threshold=1，cwmin=5
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Your network has a mixture of Fast Ethernet and Gigabit Ethernet links. What needs t o be done to ensure optimal data routing when using OSPF?（）
A . Nothing. OSPF will determine the most optimal path for routing data by default.
B . Adjust the hello and dead timers for more rapid detection of link failures.
C . Increase the reference - bandw idth used to calculate the interface default metrics, on all routers in your network.
D . Set the priority values on every broadcast interface to ensure that the designated and backup designated routers are the routers with the most processor and memory resources.
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The OPTIMIZER_USE_PLAN_BASELINES parameter is set to TRUE. The optimizer generates a plan for a SQL statement but does not find a matching plan in the SQL plan baseline. Which two operations are performed by the optimizer in this scenario?（）
A . The optimizer adds the new plan to the plan history.
B . The optimizer selects the new plan for the execution of the SQL statement.
C . The optimizer adds the new plan to the SQL plan baseline as an accepted plan.
D . The optimizer adds the new plan to the SQL plan baseline but not in the ENABLED state.
E . The optimizer costs each of the accepted plans in the SQL plan baseline and picks the one with the lowest cost.
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Which WebLogic optimization allows one non-XA resource to participate in a distributed transaction?（）
A . enabling Pinned to Thread
B . enabling Logging Last Resource
C . increasing the Statement cache size
D . setting the statement cache type to LRU
E . setting the initial and maximum capacity to the same number
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You find this query being used in your Oracle 12c database: Which method a used by the optimizer to limit the rows being returned?（）
A . A filter is added to the table query dynamically using ROWNUM to limit the rows to 20 percent of the total rows
B . All the rows are returned to the client or middle tier but only the first 20 percent are returned to the screen or the application.
C . A view is created during execution and a filter on the view limits the rows to 20 percent of the total rows.
D . A TOP-N query is created to limit the rows to 20 percent of the total row
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If Investor A has a lower risk aversion coefficient than Investor B, will Investor Bs optimal portfolio most likely have a higher expected return on the capital allocation line？
A、No,because Investor B has a lower risk tolerance
B、Yes
C、No,because Investor B has a higher risk tolerance
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Canon Inc. is a leader in the fields of professional and consumer imaging equipment and information systems, serving for （） ____and optimize your print and document processes.
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When cost externalities exist, an optimal equilibrium can be attained if the government
A．restricts production．
B．levies a tax for the difference between private costs and social costs．
C．prohibits production．
D．All three abov
E．Both A and
B．
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According to the CAPM, a rational, risk-averse investor would beleast likelyto choose as his optimal portfolio:
A．A100%allocationtotherisk-freeasset.
B．Theglobalminimumvarianceportfolio.
C．A130%allocationtothemarketportfolio.
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Relative to an investor with a steeper indifference curve, the optimal portfolio for an investor with a flatter indifference curve will most likely have:
A、A lower level of risk and return.
B、A higher level of risk and return.
C、The same level of risk and return.
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9、7 当市场急剧变化，导致供应链成本、库存和浪费增加时，企业并没有处于最优的经营状态，而是供应链处于一种倾斜状态，称为不平衡供应链。when the market changes sharply, resulting in the increase of supply chain cost, inventory and waste, the enterprise does not operate in an optimal state, but the supply chain is in an inclined state, called imbalanced supply chain.
