Which statement is FALSE about catch{} blocks?
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There can be several catch{} blocks in a try/catch structure.
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The catch{} block for a child exception class must PRECEED that of a parent execption class.
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The catch{} block for a child exception class must FOLLOW that of a parent execption class.
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If there is no catch{} block there must be a finally{} block.
In exception handling, catch blocks must be ordered from most specific to most general. A child exception class (more specific) must have its catch block BEFORE a parent exception class (more general). If a parent catch block comes first, it would catch all exceptions including child types, making child catch blocks unreachable. Therefore, the statement that child catch blocks must FOLLOW parent catch blocks is FALSE.
To answer this question, we need to understand the purpose and behavior of catch{} blocks in a try/catch structure. Let's go through each option to determine which statement is false:
Option A) There can be several catch{} blocks in a try/catch structure. This statement is true. In a try/catch structure, multiple catch{} blocks can be used to handle different types of exceptions that may occur within the try block.
Option B) The catch{} block for a child exception class must PRECEDE that of a parent exception class. This statement is true. When handling exceptions, it is generally recommended to handle more specific (child) exception classes before handling more generic (parent) exception classes. This is because if a catch{} block for a parent exception class is placed before a catch{} block for a child exception class, the catch{} block for the child exception class will never be reached.
Option C) The catch{} block for a child exception class must FOLLOW that of a parent exception class. This statement is false. The catch{} block for a child exception class must PRECEDE that of a parent exception class, as explained in Option B. This ensures that the catch{} block for the child exception class is reached before the catch{} block for the parent exception class.
Option D) If there is no catch{} block, there must be a finally{} block. This statement is false. A finally{} block is not required if there is no catch{} block. A finally{} block is used to specify a block of code that will be executed whether an exception occurs or not. It is not mandatory to include a finally{} block if there are no catch{} blocks.
Therefore, the false statement is Option C) The catch{} block for a child exception class must FOLLOW that of a parent exception class.