超星 - Third homework

单选题

The8-bit twos complement 1001 0011 is stored in16-bit.It’s equal to____.

A. 1000 0000 1001 0011
B. 0000 0000 1001 0011
C. 1111 1111 1001 0011
D. 1111 1111 0110 1101

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单选题

In twos complement, overflow may occur when ______.

A. two numbers with the same signadd
B. two numbers with the different sign subtract
C. AandB
D. multiply

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单选题

Control unit use some input signals to produce control signals that open the gates of information paths and let the micro-operations implement. Which is NOT the input signals of control unit?

A. clock and flags
B. instruction register
C. interrupt request signal
D. memory read or write

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单选题

TheREGISTER ADDRESSING has very less address space, but it has (is) _________________.

A. very less value range
B. very fast
C. more memory access
D. complex address calculation

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单选题

In register indirect addressing, the effective address of operand is stored in____.

A. register
B. main memory
C. instruction
D. PC

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单选题

Compared with indirect addressing mode，the advantage of register indirect addressing mode is________.

A. Large address space
B. Multiplememory reference
C. Limit address space
D. Less memory access

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单选题

Inbase-register addressing mode, the address of operand is equal to__________.

A. The content of base-register plus displacement
B. The content of index-register plus displacement
C. The content of program counter plus displacement
D. The content of AC plus displacement

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