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Forward-only: The cursor moves forward but can't move backward.Keyset-driven: Only updated data can be viewed, deleted and inserted data cannot be viewed.Theoretically there are basically 5 differences between Abstract Classes and Interfaces as listed below.3. Sample code String Builder number = new String Builder (10000);for (int i = 0; i The String object is immutable. Collections is a very important namespace in the programmer's perceptive.

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A foreign key identifies a column or group of columns in one (referencing) table that refers to a column or group of columns in another (referenced) table; in our example above, the Employee table is the referenced table and the Employee Salary table is the referencing table.7.String is a class that belongs to the namespace System. String concatenation can be done using the ' ' opearator or the String. Sample code string string1 = "Today is " Date Time. Write Line(string2); String Builder String Builder is a class that belongs to the namespace System. String class, you create a new string object in memory, that requires a new allocation of space for that new object. For example, using the String Builder class can boost performance when concatenating many strings together in a loop. What is the difference between array and array list? For instance if you want to sort the values in an array then you need to do the manual operations.In situations where you need to perform repeated modifications to a string, the overhead associated with creating a new String object can be costly. Here obviously we look for the classes that can automate the sorting by just calling a method. Collections namespace has many classes for the individual purpose.A result set is defined as a collection of rows obtained from a SELECT statement that meet the criteria specified in the WHERE clause.Cursors, therefore, serve as a mechanism for applications to operate on a single row or a set of rows.

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