Operating System (OS)
Under virtual storage,

only the active pages of a program are stored in primary storage
None of these
a single program is processed by two or more CPUs
interprogram interference may occur
two or more programs are stored concurrently in primary storage

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Operating System (OS)
Assembler language

requires fixed-format commands
is quite different from the SCL interpreter
is a mnemonic form of machine language
None of these
is usually the primary user interface

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