WorksheetsMICROLEVEL SYSTEM DESIGN
Total questions: 30
Worksheet time: 15mins
8086 Microprocessor supports _______ modes of operation.
2
3
4
None of these
Which of the following is not a Features of 8086?
It uses two stages of pipelining
It is available in 3 versions based on the frequency of operation
Fetch stage can prefetch up to 6 bytes of instructions
It has 512 vectored interrupts.
8086 can access up to?
4KB
1GB
1MB
64KB
ALE stands for
Address Low Enable
Advanced Latch Enable
Address Level Enable
Address Latch Enable
ALE stands for
Address Low Enable
Advanced Latch Enable
Address Level Enable
Address Latch Enable
Which method bypasses CPU for certain types of data transfer?
Hardware Interrupts
Software interrupts
I/O interface
Direct Memory Access
Microprocessor sends a _________________ signal on RD to do the read operation
High
Low
high impedence
None of these
DEN stands for
Data Enable
Direct Enable
Device Enable
None of these
In which of these modes, the immediate operand is included in the instruction itself?
register operand mode
immediate operand mode
register and immediate operand mode
none of the mentioned
In register address mode, the operand is stored in
8-bit general purpose register
si or di
16-bit general purpose register
all of the mentioned
In which of the following addressing mode, the offset is obtained by adding displacement and contents of one of the base registers?
direct mode
mediate operand mode
register mode
indexed mode
In which of the following addressing mode, the offset is obtained by adding displacement, with the contents of SI?
direct mode
mediate operand mode
register mode
indexed mode
The instruction that pushes the general purpose registers, pointer and index registers on to the stack is
POPF
PUSH Imd
PUSH*A
PUSHF
The instruction that represents the ‘rotate source, count’ is
RCL
RCR
ROR
All of the mentioned
Operation code field is present in
programming language instruction
assembly language instruction
machine language instruction
none of the mentioned
A machine language instruction format consists of
) Operand field
Operation code field
Operation code field & operand field
none of the mentioned
The instruction format ‘register to register’ has a length of
2 bytes
1 byte
3 bytes
4 bytes
The instruction, MOV AX, 1234H is an example of -
Register Addressing mode
Immediate Addressing mode
Based indexed Addressing mode
Direct Addressing mode
8085 microprocessor has how many pins -
41
39
40
30
The Intel 8086 microprocessor is a _______ processor
16 bit
32 bit
8 bit
4 bit
In 8086, Example for Non maskable interrupts are ________
rst6.5
intr
rst6.6
trap
RIM is used to check whether, _____
The interrupt is Masked or not
The write operation is done or not
both 1 & 2
None of these
Which of following instruction subtract memory and carry
from a,b
AB[a,x,y]
SBC[a,b]
SUB[a,b,d]
tst[a,b]
Which of following load the stack pointer
bgt
LDS
bhs
RTS
Which is the microprocessor comprises:
Register section
one or more ALU
control unit
All of these
Which of the following is a 16-bit register?
AL
AX
AH
All of the mentioned
The number of address and data lines of 8086_________.
8 and 8
16 and 16
20 and 16
16 and 20
Consider the following statements: Arithmetic Logic Unit (ALU)
1.Performs arithmetic operations
2.Performs comparisons.
3.Communicates with I/O devices
4.Keeps watch on the system
Which of these statements are correct?
1, 2, 3 and 4
1, 2 and 3
1 and 2
3 and 4
A microprocessor differentiates between op code, data/address at any time by
the sequence in which memory contents are fetched by it
its internal registers
the stack pointer
the program counter
Instructions used by subroutine are
only CALL
CALL & RET
Only RET
HOLD
