1. System supports two types of file, which are

text files

executable binary flies

both (a) and (b

none of these

2. Disaster recovery

is needed by every installation

is never needed

varies in degree between installations

requires off-site computer for immediate use

3. The simplest directory structure is

single level directory

two level directory

tree structure directory

none of these

4. An incremental backup

uses more tapes

should be done each month

saves only files that have recently changed

saves all files

5. Solution of name collision problem is

single level directory

two level directory

tree structure

all of these

6. A partitioned data set is most used for

storing program data

storing ISAM files

a program or source library

storing backup information

7. The allocation map

is used to store program data

specifies which blocks are used by which file

is updated by applications programs

allow programs to erase files

8. Path's name are

absolute path

relative path

both (a) and (b)

none of these

9. The activity of a file

is a low percentage of number of records that are added to or deleted from a file

is a measure of the percentage of existing records updated during a run

refers to how closely the files fit into the allocated space

is a measure of the number of records added or deleted from a file compassed with the original number of records

10. Which structure prohibits the sharing of flies and directories ?

tree structure

one level structure

two level structure

none of these