Which of the following IRQs is derived by a keyboard?
IRQ 0
IRQ 1
IRQ 2
IRQ 3
Which of the following is the highest priority interrupt?
INT 3
INT 2
INT 1
INT 0
The input frequency of the Programmable Interval Timer (PIT) is.
fixed
depends on processor clock
variable
depends on hardware attached
IRQ is referred to:
Eight input signals
One output signal
Eight output signals
one input signal
The space where all the registers of a task are stored is called
the:
control block
process control block
stack
Which of the following is a cascading interrupt?
IRQ 0
IRQ 1
IRQ2
IRQ3
Which of the following IRQ is connected to serial port COM 2?
IRQ 0
IRQ 1
IRQ 2
IRQ 3
The destination register in IN is:
AL or AX
BL or BX
CL or CX
DL or DX
Question # 2
Instruction Pointer
holds the address of the
Previous
instruction to be executed
Current
instruction
Next instruction
to be executed
None of the given
Question # 3 of 10
Register whose each
bit specify a different meaning is
Accumulator
Register
Pointer Register
Index register
Flag register
Question # 4 of 10
Bydefault CS is
associated with
SS
BP
CX
IP
Question # 5 of 10
Memory to Memory
operation is allowed
True
False
Question # 6 of 10
Size Mismatch Error is
a syntax error
False (Size mismatch is logical error)
True
True
Question # 7 of 10
unconditional jump can
be
near
short
far
all of the given
Question # 8 of 10
Register are storage
cell
Outside the
processor
Both inside and
outside the processor
Inside the
processor
None of the
given
Question # 9 of 10
Register to Register
Operation is not allowed
True
False
The operation of CMP
is to Subtract source from destination
True
False
Size Mismatch Error is
a syntax error
False
True
Unconditional jump
Execute in every
condition whether true or false
If the condition is
true
If the condition is
false
None of the given
Which type of Rotation
it is "Every bit moves one position to the right and the bit dropped from
the right is inserted at the eft. This bit is also copied into the carry flag."
ROL
RCR
RCL
None of the given
Assembly languague is
not a low level language.
true
False
In JA jump is not
taken after a CMP if the unsigned destination is larger than the unsigned
source.
True
False
Group of bits
processor uses to inform memory which element to read/write is collectively
known as
Control bus
Data bus
Address bus
RAM
Memory to Memory
operation is allowed
True
False
90 is the op-code of
Do nothing
Add
Subtract
Multiplication
we can not add two
base register i.e. (bx+bp) or cant use in an instruction
True
False
Intel follow
Littel endian
Big endian
Both littel endian and
big endian
None of the given
SHL and SAL are same
True
False
The first 16-bit
processor produced by "Intel" was 8085
True
False
The first 16-bit
processor produced by "Intel" was 8085
True
False
The extension of
assembly languague file is
.doc
.com
.lst
.asm
When a large number is
subtracted from a smaller number, a borrow is needed; in this case which flag
will be set
ZF
CF
SF
OF
All the addressing
mechanisms in iAPX88 return a number called _____________ address.
Effective address
Physical address
Direct address
None of the given
Which type of shifting
is "Inserts a zero from the left and moves every bit one position to the
right and copies the rightmost bit in the carry flag."
SHL
SAL
SAR
None of the given
mov [1234],ax is an
example of
Direct addressing
Base register indirect
Base+index
None of the given
Registers are also
called scratch pad ram
True
False
The basic function of
register is to?
Hold the operand
Hold the operator
Hold both the operator
and operand
None of the given
The jump is taken if
the last arithmetic operation changed the sign unexpectedly.
JO
JNO
JNZ
JZ
In JA jump is not
taken after a CMP if the unsigned destination is larger than the unsigned
source.
True
False
which type of rotation
it is "The carry flag is inserted from the left, every bit moves one
position to the right, and the right most bit is dropped in the carry flag.
"
RCR
ROL
RCL
ROR
which type of rotation
it is "The carry flag is inserted from the left, every bit moves one
position to the right, and the right most bit is dropped in the carry
flag. "
RCR
ROL
RCL
ROR
This jump is taken if
the last arithmetic operation produced a number in its destination that has
even parity , Which jump is taken
JP
JPE
JNP
both JP and JPE
In direct addressing
the memory address given in the instruction is
When a large number is
subtracted from a smaller number, a borrow is needed; in this case which flag
will be set
ZF
CF
SF
OF
SHL and SAL are same
True
False
we can not Subrtace
index register from the base register( bx-si )in assemlby language
True
False
Group of bits
processor uses to inform memory which element to read/write is collectively
known as
Control bus
Data bus
Address bus
RAM
The
programmable interval timer (PIT)
has input frequency of
1.193MHZ
2.193MHZ
3.193MHZ
4.193MHZ
1.193MHZ
2.193MHZ
3.193MHZ
4.193MHZ
The parallel port
connector is called ?
DB-25
BD-25
DB-24
BD-24
DB-25
BD-25
DB-24
BD-24
Threads can have
function calls, parameters and __________ variables
Global
Local
Legal
Illegal
The thread registration code initializes the PCB and adds it to the linked list so that the __________ will give it a turn.
Global
Local
Legal
Illegal
The thread registration code initializes the PCB and adds it to the linked list so that the __________ will give it a turn.
Assembler
Scheduler
Linker
Debugger
Scheduler
Linker
Debugger
The input frequency of
the programmable interval timer (PIT) is
Fixed
Fixed
Depends on processor
clock
Variable
Depends on hardware attached
Variable
Depends on hardware attached
The instruction used
to read a character from the keyboard port is
in al, 0x60
out al, 0x60
in al, 0x80
out al, 0x80
in al, 0x60
out al, 0x60
in al, 0x80
out al, 0x80
The INT 0x13 service
0x08 is use to
Read disk sector
Write disk sector
Reset disk sector
Get drive parameter
Read disk sector
Write disk sector
Reset disk sector
Get drive parameter
The first sector on hard disk contains the
Hard disk size
Partition table
Data size
Sector size
Hard disk size
Partition table
Data size
Sector size
The number of pins in
a parallel port connector are?
20
25
30
35
20
25
30
35
The INT 0x13 service
0x03 is use to
Read disk sector
Write disk sector
Reset disk sector
Get drive parameter
Read disk sector
Write disk sector
Reset disk sector
Get drive parameter
Which of the following
interrupts is used for saving and restoring the registers
INT6
INT7
INT8
INT0
INT7
INT8
INT0
All the registers
& stack are saved in
multitasking
multi-processing
function call
BIOS
multitasking
multi-processing
function call
BIOS
Which of the following
pins of a parallel port connector are grounded ?
10-18
18-25
25-32
32-39
10-18
18-25
25-32
32-39
The space where all
the registers of a task are stored is called the
control block
process control block
stack
memory
control block
process control block
stack
memory
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