Operating System (OS)
To save your computer from viruses you will do

Make physical safe for the removal disk
Scan the removable disk before using it
Install antivirus software and run it
All of these

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Operating System (OS)
What is the method of handling deadlocks?

Allow the system to enter the deadlock state and then recover
Use a protocol to ensure that the system will never enter a deadlock state
Pretend that deadlocks never occur in the system
All of these

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Operating System (OS)
The Register - to - Register (RR) instructions

which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, except in the case of store operation when it is also
None of these
have both their operands in the main store.
All of these

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Operating System (OS)
Assembler language

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

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