1.
The LES copies to words from memory to register and __________
A
DS
B
CS
C
ES
D
SS
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100 practice sets · Page 1 of 5
The LES copies to words from memory to register and __________
DS
CS
ES
SS
The BIU prefetches the instruction from memory and store them in ________
queue
register
memory
stack
The result of MOV AL, 65 is to store
store 0100 0010 in AL
store 42H in AL
store 40H in AL
store 0100 0001 in AL
Which group of instructions do not affect the flags?
Arithmetic operations
Logic operations
Data transfer operations
Branch operations
Which microprocessor accepts the program written for 8086 without any changes?
8085
8086
8087
8088
A 20-bit address bus allows access to a memory of capacity
1 MB
2 MB
4 MB
8 MB
Which of the following is not an 8086/8088 general-purpose register?
Code segment (CS)
Data segment (DS)
Stack segment (SS)
Address segment (AS)
During a read operation the CPU fetches ________
a program instruction
another address
data itself
all of the above
Which of the following is not an arithmetic instruction?
INC (increment)
CMP (compare)
DEC (decrement)
ROL (rotate left)
A 20-bit address bus can locate ________
1,048,576 locations
2,097,152 locations
4,194,304 locations
8,388,608 locations
Which is not part of the execution unit (EU)?
Arithmetic logic unit (ALU)
Clock
General registers
Flags
Which is not an operand?
Variable
Register
Memory location
Assembler
Which microprocessor has multiplexed data and address lines?
8086
80286
80386
Pentium
The first microprocessor had a(n)________.
1 – bit data bus
2 – bit data bus
4 – bit data bus
8 – bit data bus
Which bus is bidirectional?
Address bus
Control bus
Data bus
None of the above
Which method bypasses the CPU for certain types of data transfer?
Software interrupts
Interrupt-driven I/O
Polled I/O
Direct memory access (DMA)
Which of the following is not a basic element within the microprocessor?
Microcontroller
Arithmetic logic unit (ALU)
Register array
Control unit
Status register is also called as ___________.
accumulator
stack
counter
flags
The First Microprocessor was__________.
Intel 4004
8080
8085
4008
Access time is faster for _________.
ROM
SRAM
DRAM
ERAM