(21) . Which one of the following is the address generated by CPU?
Physical address
Absolute address
Logical address
None of these
(22) . Run time mapping from virtual to physical address is done by:
Memory management unit
CPU
PCl
None of these
(23) . Memory management technique in which system stores and retrieves data from secondary storage for use in main memory ls called:
Fragmentation
Paging
Mapping
None of these
(24) . The interrupt-request line is a part of the :
Data line
Control line
Address Iine
None of these
(25) . The retum address from the rnterrupt-service routine is stored on the:
System heap
Processor regrster
Processor slack
Memory
(26) . The signal sent to the device from the processor to the device after receiving an interrupt is:
interrupt-acknowledge
Return signal
Service signal
Permission signal
(27) . A relational database consists of a collection of:
Tables
Fields
Records
Keys
(28) . A _______ In a table represents a relationship among a set of values.
(29) . The term _______ is used to refer to a row
Attribute
Tuple
Field
lnstance
(30) . The term attribute refers to a ______ of a table.