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Computer Science
Computer Science is the systematic study of algorithmic processes that describe and transform information. It includes the theoretical foundations of information and computation and the practical techniques of applying those foundations to computer systems. Among the many subfields of Computer Science are computer graphics, computer programming, computational complexity theory, and human-computer interaction. Questions about Computer Science, terms such as algorithms and proofs, and methodologies are encouraged in this category.
1,839 Questions
Advantages of one pass assembler over two pass assembler?
In theory the only advantage is Speed simply because one pass is faster than two passes. However a properly written two pass assembler can be faster than a poorly written one pass assembler because the two pass assembler spends alot less time doing memory intensive lookups, look-aheads, and back-tracking.
Difference between circular queue and linear queue?
In circular queue the memory of the deleted process can be used by some other new process..
What is the benefit of using a multiple-bus architecture compared to single-bus architecture?
Multiple bus structure permit several devices to work simultaneously, therefore improving the computer's speed. In addition, it isolate processor from I/O traffic and support wider variety of interfaces.
Is a website a computer program?
Software is a program, or executable file. A website on the other hand is a place were people can express their feelings (blogging), post videos, upload files, buy from stores, and much more. Software will just preform tasks like, look at your banking, keep track of taxes, play music, play videos, convert videos and audio, edit other programs, play more complex games, and much more.
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What are the advantages of data warehousing?
Advantages of data warehousing
- One consistent data store for reporting, forecasting, and analysis
- Easier and timely access to data
- Improved end-user productivity
- Improved IS productivity
- Reduced costs
- Scalability
- Flexibility
- Reliability
- Competitive advantage
- Trend analysis and detection
- Key ratio indicator measurement and tracking
- Drill down analysis
- Problem monitoring
- Executive analysis.
The following commonly used operations are fuzzy for built-in data types:
- Inserts
- Updates
- Deletes
The following operations are nonfuzzy:
- Inserts, updates, and deletes for rows that contain user-defined data types, smart large objects (CLOB and BLOB data types), or simple large objects (TEXT and Byte data types)
- Table alters and loads
- Operations that create or modify indexes (B-tree, R-tree, or user-defined indexes)
The database server flushes all the modified data pages for nonfuzzy operations to disk during a fuzzy checkpoint in the same way as for a full checkpoint.
Important:
Fuzzy checkpoints are disabled for the primary and secondary servers in a High-Availability Data Replication pair.
Write-Ahead Logging and Fast RecoveryFuzzy checkpoint uses write-ahead logging for fast recovery. Write-ahead logging means that the logical-log records representing changes to fuzzy data must be on disk before the changed data replaces the previous version of the data on disk. Fast recovery begins with the oldest update not yet flushed to disk rather than with the previous checkpoint.
Fuzzy checkpoints result in slightly longer roll-forward fast-recovery times. The database server occasionally performs a full checkpoint to prevent loss of old logical-log records.
Fuzzy Checkpoints Improve PerformanceFuzzy checkpoints are much faster than full checkpoints and improve transaction throughput. Because the database server does not log fuzzy operations in the physical log, the physical log does not fill as quickly, and checkpoints occur less often. For example, if you are inserting and updating a lot of data, checkpoints occur less frequently and are shorter.
The database server skips a full checkpoint if all data is physically consistent when the checkpoint interval expires. It skips a fuzzy checkpoint only if no pages have been dirtied since the last checkpoint.
To improve transaction throughput, use the BUFFERPOOL configuration parameter to increase thelru_max_dirty and lru_max_dirty values. However, do not change the gap between the lru_max_dirty andlru_max_dirty values.
What is the principal disadvantge of too much multiprogramming?
The principal disadvantge of too much multiprogramming is the overhead of excesssive context-switching. If the context-switch rate is too high, the overhead can actually overwhelm the benefit of multiprogramming.
What is the role of computers in cybersecurity?
high security areas use a) fingerprint scanners
B)feet recognition systems
C) iris recognition systems
d)signature verification system
its one of these answers and im not understanding which
Reasons why information systems need to be replaced?
Some reasons why information systems might need to be replaced are:
- Changes in the business environment in which the organization operates(for example a new computer enters the market
- Technological Changes can lead to new production processes or use alternative materials in the manufacturing process
- Downsizing from centralized decision making and information systems- to decentralized decision making and information systems to make the organization more responsive to customer needs
- Re-engineering the organization's processes whereby an organization completely redesigns all its business processes to improve the performance of the business
- Changes in activities of an organization or in the nature of the organization.
- Maintaining a competitive advantage by Manufacturing a unique product line
- Increasing productivity A move away from mass production to more quality based methods of production.
How does a computer convert sounds and pictures into codes?
Somethimes it uses a program in the operating system, but it really just depends on the OS
What is called when software is used to simulate the hardware of a physical computer?
This is usually called emulation.
While inspecting a motherboard and you notice a discolored area and what is usually a cause of this?
Common causes could be a power surge or overheating.
What is communication convergence?
COMMUNICATION CONVERGENCE refers to use of ubiquitous TCP\IP Network to utiliize (to CONVERGE) for DATA, VOICE & VIDEO Transmissions & Delivery.
What are the various physical and wireless transmission media?
Physical Media
Twisted-Pair Cable
Coaxial Cable
Fiber-Optic Cable
Wireless Media
Broadcast Radio
Cellular Radio
Microwaves
Communication Satellite
Could you build a laptop from scratch and if so how?
Building a laptop from the ground up might be too challenging for most people. A better idea is to find a laptop that is no longer working (no power supply, ruined motherboard or shattered display) and replace a only few parts.
What are the latest seminar topics in computer sciencein 2009?
1 ans:3g vs WIFI
2 ans:
1)real time image processing
2)wi-fi/WI-MAX
3)storage devices-recent trends
4)fuzzy logic,
5)semantic web,
6)bluetooth
7)Spyware
8)Citation Mgt.
9)online survey
10)remote security
11)online storage
More
Computer seminar topics:
1 Application Lifecycle Management
2 OSI Model
3 Latest Advancements in SSL Technology
4 DINloop Based Inter-domain Multicast with MPLS
5 Use of MPLS technology in mobile backhaul networks
6 MPLS Technology
7 Multimedia over ATM 8 Active networking
9 Mobile Agent
10 SAN
11 Amoeba distributed operating system
12 64-Bit Computing
13 Huffman coding
14 High Availability Computer Clusters
15 TOUCH SCREEN
16 Photonic Computing
17 CLOUD COMPUTING
18 ASPECT ORIENTED PROGRAMMING
19 UNLICENSED MOBILE ACCESS
20 GPRS
From a scrap metal perspective, electronic recycling is the reclamation of valuable scrap from electronic devices. For scrap electronic devices prices, tryhttp:/www.scrapmetalpricesandauctions.com Electronics devices and/or components have very dangerous materials embedded within that must be scrapped for safety. The benefits of recycling is that gold and other precious earths are includedin the recovery.
When a kernel thread suffers a page fault, another kernel thread can be switched in to use the interleaving time in a useful manner. A single-threaded process, on the other hand, will not be capable of
performing useful work when a page fault takes place. Therefore, in scenarios where a program might suffer from frequent page faults or has to wait for other system events, a multi-threaded solution would
perform better even on a single-processor system.
Have computers changed in the last five years?
they have gotten faster and more powerful. smaller. cheaper and things like that
Difference between right join and inner join?
Hi,
Natural Join: It is combination or combined result of all the columns in the two tables.
It will return all rows of the first table with respect to the second table.
Inner Join: This join will work unless if any of the column name shall besxame in two tables
What are the objectives of inventory system?
An inventory system helps to make sure that product purchased from a supplier is correctly dispensed to the customer: This cuts back on overhead, waste (where products are perishable) and can help you to minimize theft (internal and external)
What are the Advantages and disadvantages of 1st generations of computer?
The use of transistors instead of vacuum tubes in second generation computers made them:
- smaller
- faster
- cheaper
- lighter
- run cooler
- consume less power
- more reliable
- easier to maintain
- etc.
What is most powerful computer?
Currently (in 2012) the most powerful cluster computer is the K Computer, located in Japan. This computer uses Fujitsu infrastructure comprising many CPU cores and fast network transmission. It can perform around ten petaflops per second. Each petaflop is equivalent to one million billion (10^15) math operations.
