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Introductory Topics Quiz
Section 2: HDF File Organization
- Name and describe the two primary objects that can be stored in an HDF5
file.
- What is an attribute?
- Give the path name for an object called
harry that is a member of a
group called dick, which, in turn, is a member of the root group.
Section 3: The HDF5 API
- Describe the purpose of each of the following HDF5 APIs:
H5A, H5D, H5E, H5F, H5G, H5T, H5Z
Section 4: Creating an HDF5 File
- What two HDF5 routines must be called to create an HDF5 file?
- What include file must be included in any file that uses the HDF5 library?
- An HDF5 file is never completely empty because as soon as it is created,
it automatically contains a certain primary object. What is that object?
Section 5: Creating a Dataset
- Name and describe two major datatype categories.
- List the HDF5 atomic datatypes. Give an example of a predefined datatype.
- What does the dataspace describe? What are the major characteristics of
the simple dataspace?
- What information needs to be passed to the
H5Dcreate
function, i.e., what information is needed to describe a dataset at
creation time?
Section 6: Reading from and Writing to a Dataset
- What are six pieces of information which need to be specified for
reading and writing a dataset?
- Why are both the memory dataspace and file dataspace needed for
read/write operations, while only the memory datatype is required?
- What does the line
DATASPACE { SIMPLE (4 , 6 ) / ( 4 , 6 ) }
in Figure 6.1 mean?
Section 7: Creating an Attribute
- What is an attribute?
- Can partial I/O operations be performed on attributes?
Section 8: Creating a Group
- What are the two primary objects that can be included in a group?
Section 9: Creating Groups Using Absolute and Relative Names
- Group names can be specified in two ways. What are these two types
of group names?
- You have a dataset named
moo in the group boo, which is
in the group foo, which, in turn, is in the root group.
How would you specify an absolute name to access this dataset?
Section 10: Creating Datasets in Groups
- Describe a way to access the dataset
moo described in the
previous section (Section 9, question 2) using a relative name.
Describe a way to access the same dataset using an absolute name.

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University of Illinois
at Urbana-Champaign
hdfhelp@ncsa.uiuc.edu
Last Modified: June 22, 2001