CS401-Midterm
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When an item is pushed on the decrementing stack, the top of the stack is
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Left-Shift-Operation the left most bit _______
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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The physical address of the stack is obtained by
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Stack is a ______ that behaves in a first in last out manner.
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one RET is executed, it recovers the values from
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An offset alone is not complete without
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When a 32 bit number is divided by a 16 bit number, the quotient is of
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“mov byte [num1], 5” is _________ instruction.
10 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
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The iAPX88 processor supports ___________ modes of memory access.
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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After execution of JCXZ instruction CX will changed with flag affect.
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Only instructions allow moving data from memory to memory.
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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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The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
17 / 50
REP will always
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In the instruction “CMP AX,BX” the contents of
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When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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21 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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Which bit of the attributes byte represents the red component of background color ?
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After the execution of MOVS instruction which of the following registers are updated
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After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
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The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
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After the execution of “PUSH AX” statement
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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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To convert any digit to its ASCII representation
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After the execution of instruction “RET”
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In a video memory, each screen location corresponds to
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After the execution of STOSW the CX will be
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The second byte in the word designated for screen location holds
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35 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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38 / 50
Regarding assembler, which statement is true:
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The clear screen operation initialize whole block of memory
40 / 50
The instruction ADC has________ Operand(s)
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After the execution of instruction “RET ”
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In STOSB instruction, when DF is Set, SI is
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44 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
45 / 50
To transfer control back the RET instruction take
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The first instruction of “COM” file must be at offset:
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“Far” jump is not position relative but is _______________
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49 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
50 / 50
_________ is one of the reasons due to which string instructions are used in 8088
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