Software Applications Programming Errors and solutions.

1)Btree index:when ever we are requesting data using btree indexes columns using where clause then oracle server searching for indexes in database,if btree indexes columns are available in database then oracle server automatically creates btree structure,through btree structure only oracle server retrieve data very fast from data base . 2)Bitmap index:when ever we are using bitmap index then oracle server automatically creates bitmap table,it is mostly used in data-ware house applications.bitmap index is high performance compare to btree index because bitmap index internally creates bitmap table. 3)By default indexes are btree indexes. When ever we are creating the primary key ,unique key constraints automatically btree indexes are created. If you want to create bitmap index then explicitly you have to mention the bitmap keyword at the time of creation of index. Bitmap index mostly created on lo cardinality columns.the table having wide range values.

An Embedded system is any computer system hidden inside a product other than a computer.  You will encounter a number of difficulties when you writer embedded-system software in addition to those you encounter when you write applications. Throughput — Your system may need to handle a lot of data in a short period of time. Response — Your system may to react to events quickly. Testability — Setting up equipment to teat embedded software can be difficult. Debug ability — Without a screen or a keyboard, finding out what the software is doing wrong is a trouble some problem. Reliability —Embedded systems must be able to handle any situation without human intervention. Memory Space —Memory is limited on embedded systems, and you must make the software and the data fit into whatever memory exists. Program installation —You will need special tools to get your software into embedded systems. Power Consumption —Portable systems must run on battery power, and the software in these sys

Platform Independence of .NET Platform Its lang independent as long as that language's compiler targets the managed environment.. i.e, code written in C#.net or VB.Net or any other .Net compliant language will result in the same IL. certainly .net doesn't compile in UNIX. No compilers til date i suppose.. Heard that something similar exists to compile .net in Linux tho'.. Platform Independent does not mean O S independence in .NET terms. It means you can build a managed code and be assured it works on 32 - bit m/c, 64 bit m/c etc. Of course, at present it only supports Windows as O S, but Microsoft has left open the UNIX ( or any other O S for that matter) implementation of .NET run time. Lot of open source projects are going on in this regard. Advantages of asp with c sharp over asp with vb.net ultimately both copies in to MSIL, it depends on what application designing and what is the background of the developers who work for. C# more structured and fully OOP e

Question: What is bulk-collect and any restrictions in bulk-collect ? what is the use of limit clause in bulk-collect ? Answer: With bulk collect we can move all the resultant set in bulk to b processed in PL/SQL engine which kindles high efficiency but at the cost of memory ,thus the resultant set is moved in batches by giving how many records to be moved in one batch by specifying it in limit clause. Actually bulk collect performance is very high,because when ever resource table having large amount of data to fetch data using cursors that is degrade performance of the application,to improve performance of the application then we are using bulk collect,limit is an optional clause using in cursor fetch statement with bulk collect clause. Bulk collect reduces the context switching between the SQL and PL/SQL engines .. thereby increasing performance.. we can reduce the context switch to one but in case of very large data set. it's must that you use limit clause to manage t

Error Details: Getting below error when trying to open process details or checking long queries in Activity Monitor window in SQL server R2 Enterprise Edition. The Activity Monitor is unable to execute queries against server [xxxx server]. Activity Monitor for this instance will be placed into a paused state. Use the context menu in the overview pane to resume the Activity Monitor. Other Information: Unable to find SQL Server process ID [PID] on server [xxxx server] (Microsoft.SqlServer.Management.ResourceMonitoring) Solution : This error exist because one of your service is not enabled on server.Name of Service is Performance Counter DLL Host. Just go to Services in control panel and find service Performance Counter DLL Host set it automatic and start the service. After doing this you need to close sql and reopen again. If still error not resolved then go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PerfProc\Performance by in registry editor using regedt32 command.

1. Please do not open any Email attachments from unknown sources your own personal mail accounts such as Yahoo, Gmail, etc. 2. Kindly take backup all your important Data regularly on CD or DVD and scan external disk before using. 3. Please  do not click on any Links , sent from unknown sources, either via Emails or accessing your Facebook,twitter account.  These can be infected with virus. 4. Please do not Disable your Anti-Virus under any circumstances on your machine. 5. Update all Patches - Antivirus, Operating System , MS Office and windows patches update . 6. If you are unable to open any of your files then need to check virus infection and scan with antivirus. 7. If you use or share any External Drives such as  USB Hard Disks, need to SCAN them with the Antivirus software before using them.

Following are the Disadvantages of materialized View in SQL 1.We can not perform any DML Operations on materialized View ,but you can perform DDL Operations like DROP.The thing is here it stores the all records even if it is duplicate or non-duplicates,especially which we are using aggregate values.For example daily loads,monthly loads,yearly loads.such cases it would be very helpful storing of entire data if it is new or old. The disadvantage is takes space Can only be based on a simple Select if you require real time data. maintaining the materialized View  Logs has an overhead on the master system. 2.We can't perform DML on materialized View  because it is like snapshot or read only .it is mainly used for reporting purposes.A materialized view can be either read-only, updatable or writable. We Can't Perform DML on read-only but can Perform DML on updatable or writable. 3.On readable - we cant perform DML. on updatable- we can perform DML, we need to create the mate