CS401-Midterm
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The second byte in the word designated for one screen location holds
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one Only ___________ instructions allow moving data from memory to memory.
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8088 is a 16bit processor with its accumulator and all registers of __________.
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If the direction of the processing of a string is from higher addresses towards lower addresses then
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When a 16 bit number is divided by an 8 bit number, the quotient will be in
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When a 16 bit number is divided by an 8 bit number, the dividend will be in
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An offset alone is not complete without
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In STOSB instruction, when DF is Set, SI is
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When two 16bit numbers are added the answer can be 17 bits long, this extra bit that won’t fit in the target register is placed in the where it can be used and tested
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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If the address of memory location Num1 is 0117 and its content is 0005 then after execution of the instruction “ mov bx, Num1” bx will contain
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The routine that executes in response to an INT instruction is called
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In STOS instruction, the implied source will always be in
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The first instruction of “COM” file must be at offset:
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When an item is pushed on the decrementing stack, the top of the stack is
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To convert any digit to its ASCII representation
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allow changing specific processor behaviors and are used to play with it.
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JC and JNC test the ____________ flag.
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While using STOBS, if DF=1 then
20 / 50
After the execution of instruction “RET ”
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22 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
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In a video memory, each screen location corresponds to
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Regarding assembler, which statement is true:
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When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called
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If we want to divide a signed number by 2, this operation can better be accomplished by
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Which of the following options contain the set of instructions to open a window to the video memory?
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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REP will always
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31 / 50
The basic function of SCAS instruction is to
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The instruction ADC has________ Operand(s)
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which bit sets the character "blinking" on the screen?
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36 / 50
_______ register holds the address of next instruction is to be executed
37 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
38 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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40 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
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The extended ASCII has
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The physical address of the stack is obtained by
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mov ax,5 has
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45 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
46 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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48 / 50
In assembly the CX register is used normally as a ______________register.
49 / 50
one DIV instruction has
50 / 50
Assembly language is:
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