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Q:

What is the common usage of serialization? What exceptions occur during serialization?

Answer

The object need to be serialized when it’s sent over a network and when it’s state is saved. Exceptions which occur during serialization are:


a. transient fields


b. when the base class is serialized then only base class fields are handled.


c. static fields are ignored because they are not part of any state.

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Subject: Java

Q:

Explain how PL/SQL exceptions are raised.

Answer

PL/SQL exceptions are raised using the RAISE command. This command is used when exceptions are defined by programmer and not implicit exceptions.


 


Example:


Declare and raising an exception:


DECLARE


short_of_attendance EXCEPTION;


min_attendance NUMBER(4);


BEGIN


...


IF min_attendance < 10 THEN


RAISE short_of_attendance;


END IF;


EXCEPTION


WHEN short_of_attendance THEN


-- handle the error


END;

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Subject: Oracle

Q:

Explain some of the commonly used Predefined PL/SQL Exceptions.

Answer

1)Divide by zero        – This is raised when any number is attempted to divide by zero.


2)TOO MANY ROWS   - A SELECT INTO statement returns more than one row.


3)CASE_NOT_FOUND - No choice in the WHEN clause of a case statement is selected.


4)LOGIN_DENIED      - An attempt to login with an invalid username or password.


5)PROGRAM_ERROR  - An internal PL/SQL problem.

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Subject: Oracle

Q:

What are PL/SQL cursor exceptions?

Answer

Cursor_Already_Open,  Invalid_Cursor.

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Subject: SQL

Q:

Name any three PL/SQL exceptions?

Answer

Too_many_rows.


No_Data_Found.


Zero_Error.


 

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Subject: SQL

Q:

Where does the exceptions are used?

A) Exceptions are used when postconditions of a function cannot be satisfied. B) Exceptions are used when postconditions of a function can be satisfied.
C) To preserve the program D) none of these
 
Answer & Explanation Answer: B) Exceptions are used when postconditions of a function can be satisfied.

Explanation:
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Filed Under: C++

Q:

How do define the user-defined exceptions?

A) inheriting and overriding exception class functionality. B) overriding class functioality.
C) inheriting class functionality D) none of the mentioned
 
Answer & Explanation Answer: A) inheriting and overriding exception class functionality.

Explanation:
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Filed Under: C++