Dassault Systemes Most Frequently Asked Latest ASP.NET Interview Questions Answers
Describe The Accessibility Modifier Protected Internal?It is available to derived classes and classes within the same Assembly (and naturally from the base class it is declared in).
C# Provides A Default Constructor For Me. I Write A Constructor That Takes A String As A Parameter, But Want To Keep The No Parameter One. How Many Constructors Should I Write?
Two.
Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there is no implementation in it.
What Is Code-behind?
Code-Behind is a concept where the contents of a page are in one file and the server-side code is in another page. This allows different people to work on the same page at the same time and also allows either part of the page to be easily redesigned, with no changes required in the other. An Inherits attribute is added to the @ Page directive to specify the location of the Code-Behind file to the ASP.NET page.
List The Asp.net Validation Controls?
RequiredFieldValidator,
RangeValidator,
CompareValidator,
RegularExpressionValidator,
CustomValidator,
ValidationSummary.
Delete command removes the rows from a table based on the condition that we provide with a WHERE clause. Truncate will actually remove all the rows from a table and there will be no data in the table after we run the truncate commad.
TRUNCATE
TRUNCATE is faster and uses fewer system and transaction log resources than DELETE.
TRUNCATE removes the data by deallocating the data pages used to store the table’s data, and only the page deallocations are recorded in the transaction log.
TRUNCATE removes all rows from a table, but the table structure, its columns, constraints, indexes and so on, remains. The counter used by an identity for new rows is reset to the seed for the column.
You cannot use TRUNCATE TABLE on a table referenced by a FOREIGN KEY constraint. Because TRUNCATE TABLE is not logged, it cannot activate a trigger.
TRUNCATE cannot be rolled back.
TRUNCATE is DDL Command.
TRUNCATE Resets identity of the table.
DELETE
DELETE removes rows one at a time and records an entry in the transaction log for each deleted row.
If you want to retain the identity counter, use DELETE instead. If you want to remove table definition and its data, use the DROP TABLE statement.
DELETE Can be used with or without a WHERE clause
DELETE Activates Triggers.
DELETE can be rolled back.
DELETE is DML Command.
DELETE does not reset identity of the table.
When Is The Use Of Update_statistics Command?
This command is basically used when a large processing of data has occurred. If a large amount of deletions any modification or Bulk Copy into the tables has occurred, it has to update the indexes to take these changes into account. UPDATE_STATISTICS updates the indexes on these tables accordingly.
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| Dassault Systemes Most Frequently Asked Latest ASP.NET Interview Questions Answers |
What Is The Difference Between A Having Clause And A Where Clause?
They specify a search condition for a group or an aggregate. But the difference is that HAVING can be used only with the SELECT statement. HAVING is typically used in a GROUP BY clause. When GROUP BY is not used, HAVING behaves like a WHERE clause. Having Clause is basically used only with the GROUP BY function in a query whereas WHERE Clause is applied to each row before they are part of the GROUP BY function in a query.
What Are The Properties And Different Types Of Sub-queries?
Properties of Sub‐Query
A sub‐query must be enclosed in the parenthesis,
A sub‐query must be put in the right hand of the comparison operator and,
A sub‐query cannot contain an ORDER‐BY clause,
A query can contain more than one sub‐query.
Types of Sub‐query
Single‐row sub‐query, where the sub‐query returns only one row,
Multiple‐row sub‐query, where the sub‐query returns multiple rows and,
Multiple column sub‐query, where the sub‐query returns multiple columns.
What Is Sql Profiler?
SQL Profiler is a graphical tool that allows system administrators to monitor events in an instance of Microsoft SQL Server. You can capture and save data about each event to a file or SQL Server table to analyze later. For example, you can monitor a production environment to see which stored procedures are hampering performances by executing too slowly.
Use SQL Profiler to monitor only the events in which you are interested. If traces are becoming too large, you can filter them based on the information you want, so that only a subset of the event data is collected. Monitoring too many events adds overhead to the server and the monitoring process and can cause the trace file or trace table o grow very large, especially when the monitoring process takes place over a long period of time.
What Are The Authentication Modes In Sql Server? How Can It Be Changed?
Windows mode and Mixed Mode ‐ SQL & Windows.
To change authentication mode in SQL Server click Start, Programs, Microsoft SQL Server and click SQL Enterprise Manager to run SQL Enterprise Manager from the Microsoft SQL Server program group. Select the server then from the Tools menu select SQL Server Configuration Properties, and choose the Security page.
Which Command Using Query Analyzer Will Give You The Version Of Sql Server And Operating System?
SELECT SERVERPROPERTY ('productversion'), SERVERPROPERTY ('productlevel'), SERVERPROPERTY ('edition').
What Is Sql Server Agent?
SQL Server agent plays an important role in the day‐to‐day tasks of a database administrator (DBA). It is often overlooked as one of the main tools for SQL Server management. Its purpose is to ease the implementation of tasks for the DBA, with its full‐function scheduling engine, which allows you to schedule your own jobs and scripts.
Can A Stored Procedure Call Itself Or Recursive Stored Procedure? How Much Level Sp Nesting Is Possible?
Yes.
Because Transact‐SQL supports recursion, you can write stored procedures that call themselves. Recursion can be defined as a method of problem solving wherein the solution is arrived at by repetitively applying it to subsets of the problem. A common application of recursive logic is to perform numeric computations that lend themselves to repetitive evaluation by th same processing steps. Stored procedures are nested when one stored procedure calls another or executes managed code by referencing a CLR routine, type, or aggregate. You can nest stored procedures and managed code references up to 32 levels.
What Is Log Shipping?
Log shipping is the process of automating the backup of database and transaction log files on a production SQL server, and then restoring them onto a standby server. Enterprise Editions only supports log shipping. In log shipping the transactional log file from one server is automatically updated into the backup database on the other servr. If one server fails, the other server will have the same db and can be used this as the Disaster Recovery plan. The key feature of log shipping is that it will automatically backup transaction logs throughout the day and automatically resore them on the standby server at defined interval.
Name 3 Ways To Get An Accurate Count Of The Number Of Records In A Table1?
SELECT * FROM table1,
SELECT COUNT(*) FROM table1,
SELECT rows FROM sysindexes WHERE id = OBJECT_ID(table1) AND indid < 2.
What Does It Mean To Have Quoted_identifier On? What Are The Implications Of Having It Off?
When SET QUOTED_IDENTIFIER is ON, identifiers can be delimited by double quotation marks, and literals must be delimited by single quotation marks. When SET QUOTED_IDENTIFIER is OFF, identifiers cannot be quoted and must follow all Transact‐SQL rules for identifiers.
What Is The Difference Between A Local And A Global Temporary Table?
A local temporary table exists only for the duration of a connection or, if defined inside a compound statement, for the duration of the compound statement.
A global temporary table remains in the database permanently, but the rows exist only within a given connection. When connection is closed, the data in the global temporary table disappears. However, the table definition remains with the database for access when database is opened next time.
What Is The Stuff Function And How Does It Differ From The Replace Function?
STUFF function is used to overwrite existing characters. Using this syntax, STUFF (string_expression, start, length, replacement_characters), string_expression is the string that will have characters substituted, start is the starting position, length is the number of characters in the string that are substituted, and replacement_ characters are the new characters interjected into the string. REPLACE function to replace existing characters of all occurrences. Using the syntax REPLACE (string_expression, search_string, replacement_string), where every incidence of search_string found in the string_expression will be replaced with replacement_string.
System.Object.
How Is Method Overriding Different From Overloading?
When overriding, you change the method behavior for a derived class. Overloading simply involves having a method with the same name within the class.
What Does The Keyword Virtual Mean In The Method Definition?
The method can be overridden.
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