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