141. which types of file organization are supported by magnetic tape?

random files

contiguous sequential file

indexed sequential file

all of these

142. Number of minimal set of required file operations are

two

four

five

six

143. The volatility of a file refers to

the number of records added or deleted from a file composed to the original number of records in that file

efficiency with which non-sequential files are processed

the extent where the records of the file are contiguous and in proximity to others

percentage of records that has changed in a given time period.

144. How many common file type are there?

nine

six

five

two

145. Wild-card specifiers

provide an easy way of finding groups of related files

are only used when printing the contents of files

can be used when writing a file

allow several files to be read simultaneously

146. System supports two types of file, which are

text files

executable binary flies

both (a) and (b

none of these

147. Disaster recovery

is needed by every installation

is never needed

varies in degree between installations

requires off-site computer for immediate use

148. The simplest directory structure is

single level directory

two level directory

tree structure directory

none of these

149. An incremental backup

uses more tapes

should be done each month

saves only files that have recently changed

saves all files

150. Solution of name collision problem is

single level directory

two level directory

tree structure

all of these

151. A partitioned data set is most used for

storing program data

storing ISAM files

a program or source library

storing backup information

152. 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

153. Path's name are

absolute path

relative path

both (a) and (b)

none of these

154. 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

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

tree structure

one level structure

two level structure

none of these

156. The most efficient data set organization is a/an

sequential file

ISAM file

variable depending upon the usage of the datase

a partitioned data set

157. The file structure that redefines its first record at a base of zero uses the term

relative organization

key fielding

dynamic reallocation

all of these

158. A system has 3 processes sharing 4 resources. If each process needs a maximum of 2 units, then

deadlock can never occur

deadlock may occur

deadlock has to occur

none of these

159. The methods for dealing with the deadlock problem is

Use a protocol to make sure that the system never enters in to the deadlock state.

Allow the system to enter a deadlock state and then recover.

Ignore the problem, and pretend that deadlocks never occur in the system. The UNIX operating system uses this solution.

all of these

160. Consider a system having 'm' resources of the same type. These resources are shared by 3 processes A, B, C, which have peak time demands of 3, 4, 6 respectively. The minimum value of 'm' that ensures that deadlock will never occur is

11

12

13

14