计算机组织与结构 COA考试习题 (6)

Chapter 10 and Chapter 11
1: In instruction, the number of addresses is 0, the operand(s)’ address is implied, which is(are) in_______.
A. accumulator
B. program counter
C. top of stack
D. any register
2. The address of the top of stack is stored in _________________.
A. PC
B. Accumulator
C. SP
D. Base Register
3: In index-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
4: The address of operand is in the instruction, it is_________ ?
A.Direct addressing mode
B.Register indirect addressing mode
C.Stack addressing mode
D.Displacement addressing mode
5: Which the following is not the area that the source and result operands can be stored in ?
A.Main or virtual memory
B.CPU register
C.I/O device
D.Instruction
6: Compared with indirect addressing mode , the advantage of register indirect addressing mode is
rge address space
B.Multiple memory reference
C.Limit address space
D.Less memory access
7:With base-register ADDRESSING , the ______________ register can be used.
A. BASE
B. INDEX
C. PC
D. ANY
8:The disadvantage of INDIRECT ADDRESSING is ____________.
A. large addressing range
B. no memory access
C. more memory access
D. large value range
9:Which is not an advantage with REGISTER INDIRECT ADDRESSING?
A. just one times of operand’s access
B. large memory space
C. large value range
D. no memory reference
10:The REGISTER ADDRESSING is very fast, but it has _________________.
A. very less value range
B. very less address space
C. more memory access
D. very complex address’ calculating
11:The disadvantage of IMMEDIATE ADDRESSING is ___________.
A. limited address range
B. more memory access
C. limit value range
D. less memory access
12:In instruction, the number of addresses is 2, one address does double duty of_________.
A. a result and the address of next instruction
B.an operand and a result
C.an operand and the address of next instruction
D.two closed operands
13.In instruction, the number of addresses is 3, which are _______________.
A. two operands and one result
B. two operands and an address of next instruction
C. one operand, one result and an address of next instruction
D. two operands and an address of next instruction
14.The address is known as a type of data, because it is represented by __________.
A. a number of floating point
B. a signed integer
C. an unsigned integer
D. a number of hexadecimal
15.Which is not a feature of Pentium .
A. complex and flex addressing
B. abundant instruction set
C. simple format and fixed instruction length
D. strong support to high language
16. Which is not a feature of Power PC .
A. less and simple addressing mode
B. basic and simple instruction set
C. variable instruction length and complex format
D. strong support to high language
17. The advantage of IMMEDIATE ADDRESSING is ___________.
A. limited address range
B. more memory access
C. limit value range
D. no memory access
18. In computer, the address is viewed as a(n) ________________.
A. unsigned integer
B. signed integer
C. floating-point
D. character
19. Indirect addressing mode is viewed as the worst because it _________
A. has a large address range
B. can access flexibly memory
C. wastes a lot of memory access time
D. can’t get standard data
20. Pentium MMX instructions can deal with ____________.
A. multi-media data
B. mixed integer and floating-point
C. multiplicand and multiplier (被乘数和乘数)
D. multi-disk’s data
21.A branch instruction performed by CPU is to update ____.
A MBR to contain the instruction
B Program counter to contain the address of next instruction
C MAR to contain the address of current instruction
D IR to contain the instruction that just fetched from memory
22.Each instruction must contain the information required by CPU for execution. Which is not element of instruction? ____.
A operation code
B source operand reference
C next instruction reference
D operand address calculation
23. The address of operand is in _____________, it is direct addressing mode.
A. the instruction
B. the register R
C. the main memory
D. virtual memory
24. Which element of an Instruction can’t be implicit?
A. Operation code
B. Source Operand reference
C. Result Operand reference
D. Next Instruction Reference
25 Compared with register indirect addressing mode, the disadvantage of indirect addressing mode is___________.
A. Large address space
B. Multiple memory reference
C. Limit address space
D. Less memory access
26.Which addressing mode does not belong to displacement addressing? ____.
A relative addressing
B base-register addressing
C index addressing
D register indirect addressing
27.In register indirect addressing, the effective address of operand is stored in __ __.
A register
B main memory
C instruction D. PC
28. Consider a machine-language instruction CALL X, which stands for calling procedure at location X. If the return address is saved on the top of stack, the saved location is pointed by ___________.
A. SP
B. PC
C. MAR
D. MBR
29. Which addressing mode is similar to direct addressing? The only difference is that the address field does not refer a main memory address. ___________.
A. Register
B. Displacement
C. Register indirect
D. stack
30. The REGISTER 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。