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PL-SQL Interview Questions and Answers

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PL-SQL Interview Questions & Answers


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Questions Question: What is PL/SQL table ?
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Questions Question: What is a cursor ? Why Cursor is required ?
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Questions Question: Explain the two type of Cursors ?
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Questions Question: What are the PL/SQL Statements used in cursor processing ?
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Questions Question: What are the cursor attributes used in PL/SQL ?
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Questions Question: What is a cursor for loop ?
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Questions Question: What will happen after commit statement ?
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Questions Question: Explain the usage of WHERE CURRENT OF clause in cursors ?
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Questions Question: What is a database trigger ? Name some usages of database trigger ?
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Questions Question: How many types of database triggers can be specified on a table ? What are they ?
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Questions Question: Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?
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Questions Question: What are two virtual tables available during database trigger execution ?
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Questions Question: What happens if a procedure that updates a column of table X is called in a database trigger of the same table ?
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Questions Question: Write the order of precedence for validation of a column in a table ? I. done using Database triggers. ii. done using Integarity Constraints.
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Questions Question: What is an Exception ? What are types of Exception ?
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Questions Question: What is Pragma EXECPTION_INIT ? Explain the usage ?
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Questions Question: What is Raise_application_error ?
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Questions Question: What are the return values of functions SQLCODE and SQLERRM ?
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Questions Question: Where the Pre_defined_exceptions are stored ?
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Questions Question: What is a stored procedure ?
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Latest 10 Answers
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Honesty, helpful and reliable
procedure is a set of sql statement ,are combined to gether to perform a specific task or to solve a specifi problem.it does not return value.
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first execute the bc search spec to fetch the data then executes the applet search spec if applet search spec is not match with bc it skips
TCP-Transmission Control Protocol. TCP is Reliable. TCP is Connection oriented. UDP-User Datagram Protoco UDP is Unreliable. UDP is Connectionless.
By default in structure all data member and member function are public,i,e if you not mentation any access specifier. But in case of class By default all data member and member function are private.
Structure is a user defined data type. By default all structure variables are public type and we cann't use access specifier in structure type variable, where as in class we can define objects(variables) under required access specifier type.
variable cost is the cost which is not fixed in nature

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