COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In ARM, ____ is the default mode at start up or reset
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Supervisor mode
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Non privileged mode
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System mode
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User mode
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Explanation:
Detailed explanation-1: -Undefined mode is the default mode to which an instruction-related exception, including any attempt to execute an undefined instruction, is taken.
Detailed explanation-2: -Supervisor mode is a protected mode for the operating system. Abort mode is entered after a data or instruction Prefetch Abort. System mode is a privileged user mode for the operating system.
Detailed explanation-3: -On an ARM processor, when the Reset input is asserted the processor stops execution. When Reset is deasserted, the processor then starts executing instructions: in Secure state, if it implements the Security Extensions. in Supervisor mode, with interrupts disabled.
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