Question

2. Some XmlReader methods throw an XmlException if they encounter an unexpected situation.

True

False

3.A stream is the flow of data from one location to another.

True

False

5.To catch any I/O exception, you can use the exception classes that inherit the IOException class such as FileNotFoundException.

True

False

Answer 1

2.Some XmlReader methods throw an XmlException if they encounter an unexpected situation,

TRUE

Yes TRUE Because XmlReader throws associate degree XmlException on XML break down errors.After associate degree exception is thrown ,the state of the reader isn't predictable .XmlException is thrown within the initial validation error.Xmlexception is thrown if the XMl file contains extrajudicial characters or invalid XML names.The XML 1.0 recommendation needs document-level agreement once a DTD is gift. Therefore, if the reader is organized to support ConformanceLevel.Fragment, however the XML information contains a document sort definition (DTD), associate degree XmlException is thrown.

3.A stream is the flow of data from one location to another

TRUE

Because,Streams do not store data,they provide data from a source as a collecton.Streams do no modify the data source,they transform data into a new stream ,for instance,when doing a filtering operation.Stream is a sequence of elements from source that supports sequential and parallel aggregate operations.A Java collection is an in memory data structure with all elements contained within memory while a stream is a data structure with all elements computed on demand.An operaton of a stream produces a result without modifying its source.

5.To catch any I/O exception, you can use the exception classes that inherit the IOException class such as FileNotFoundException.

TRUE

To catch any I/O exception(While using file input/output stream related exception) you can use a checked exception. A checked exception is associate degree exception that the Java ASCII text file should handle, either by catching it or declaring it to be thrown. Checked exceptions area unit usually caused by faults outside of the code itself - missing resources, networking errors, and issues with threads return to mind. These might embrace subclasses of FileNotFoundException, etc.,the compile time error due to checked exception (FileNotFoundException and IO Exception) related to file operation.IDE suggests either we need to enclose our code inside try-catch block or we can use throws keyword in the method declaration.If the exceptions have parent-child relationship, the catch blocks must be sorted by the most specific exceptions first, then by the most general ones.If the protected code can throw different exceptions which are not in the same inheritance tree, i.e. they don’t have parent-child relationship, the catch blocks can be sorted any order.If we catch the most general exception first, then we also catch other exceptions which are subtypes of the general exception.