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  
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
The parallel port connector is called ?
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.
Assembler
Scheduler
Linker
Debugger 
The input frequency of the programmable interval timer (PIT) is
Fixed
Depends on processor clock
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
The INT 0x13 service 0x08 is use to
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
The number of pins in a parallel port connector are?
20
25
30
35

The INT 0x13 service 0x03 is use to
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
All the registers & stack are saved in
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
The space where all the registers of a task are stored is called the
control block
process control block
stack
memory 

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