Multiple Choice Questions (MCQs)
There are ________ registers in iAPX88 architecture that can hold address of data.
In STOSW instruction, when DF is clear, DI is ___________
In DOS input buffer, the number of characters actually read on return is stored in ___________ byte.
In general, width of a memory cell cannot be greater than the width of ________.
Which of the following Move generates error in .com file?
Physical memory adresses is of
The 8088 processor divides interrupts into ________ classes.
SCAS compares a source byte or word in register AL or AX with the ________ string element addressed by ES: DI and updates the flags.
In ________ every bit moves one position to the right and the bit dropped from the right is inserted at the left and also copied into the carry flag?
______ is the highest priority interrupt in interrupt controller.
The 'program segment prefix' for com files is of size:
All mathematical and logical operations are performed on the ________.
In a comparison, if the both operands are same. The result of subtraction will be zero and the zero flag will be ________.
What does the given instruction do? SHR DL, 1
Which of the following is used to terminate a string in assembly language?
An 8 x 16 font is stored in ______________ bytes.
The jump command that does not depend on FLAG register is
Which part of this (00000000000 B80500) encoded instruction is an offset?
The instruction, MOV AX, 0005H belongs to the address mode of ________ .
MUL (multiply) instruction performs an unsigned multiplication of the source operand and the ________ .
The execution of the instruction "mov word [ES : 160], 0x1230" will print a character on the screen at:
Stack is a data structure that behaves in a first in last ________ manner.
In DOS input buffer, number of characters actually read on return is stored in _______.
SP is associated with ____________ , by default.
Number of operands of ADC (add with carry) register are:
If AX=5, BX=5, CF and ZF are set, AF and DX contains zero then after the execution of instruction "ADC AX, BX", AX will contain the value ________.
Which of the following services of INT 10 is used for writing the string?
Which bit of the attributes byte represents the red component of foreground color?
Sending the appropriate signals on the control bus to the memory is the responsibility of ________.
How many characters were defined by standard ASCII?
In branching mechanism, the assembler
There are just ________ block processing instructions in 8088.
The interrupt call loads new values in ________ segment.
________ is set only when the last mathematical or logical operation produces a zero in its destination.
We can set the current file position in DOS using service number ________.
________ and ________ are taken if the last arithmetic operation produced a number in its destination that has odd parity.
The extention of assembly languague file is
DX plays an important role in arithmetic ________.
Which of the following string instruction is generally used in a loop instead of REP prefix?
________ is the basic means of sorting temporary data on the stack.
In the instruction MOV AX, 5 the number of operands are _______.
All the addressing modes return the number after calculation, this number is known as ________ ?
Which of the following interrupts is Non maskable interrupt?
Which of the following register is used to hold address of the next instruction to be executed?
Which of the following INT 21 service is used to read character from standard input?
MOV [BX+SI+300], AX is a ________ addressing mode instruction.
Which of the following addressing scheme has been used in the instruction MOV [BX], AX?
This jump is taken if the last arithmethic operation produced a positive number in its destination.
________ is a special instruction that load a segment register and a general purpose register from a memory locations.
The other directive is "define word" or "dw" with the same syntax as "db" but reserving a whole word of ________ bits instead of a byte.
CX register is mostly used as a
________ instruction makes the code reusable.
ASCII table is the contiguous arrangement of the upercase alphabets (41-5A), the lowercase alphabets (61-7A), and the numbers ________.
"INT 13-BIOS disk services" generally uses which register to return the 'error code'?
When an element is pushed on the stack SP is decremented by ________.
Which of the following gives the more logical view of the storage medium?
"mov [bp], al" moves the one byte contents of the AL register to the address contained in BP register in the current ________.
Which of the following registers hold the page number for using the write string service of INT 10?
Which of the following is a non-destructive AND operation?
The jump is taken if the last arithmetic operation changed the sign unexpectedly.
BH register is a ________ bit register.
When a 32 bit number is divided by a 16 bit number, the quotient is of _______.
mov [1234], ax is an example of
In the context of video services, if we want to set cursor position which of the following will be the value of AH?
In multitasking, which of the following interrupts is used as scheduler during context switching?
Which of the following operation is used to clear any specific bit in a binary number?
________ is a temporary storage places inside the processor.
In case of 32-bit processor, the size of an accumulator register will be ________ bits.
Group of bits processor uses to inform memory which element to read/write is collectively known as
The purpose of MOVS instruction is:
The top of stack is contained in ________ register.
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