CS401-Midterm
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The instruction ADC has________ Operand(s)
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Only instructions allow moving data from memory to memory.
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REP will always
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Which bit of the attributes byte represents the blue component of background color ?
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Left-Shift-Operation the left most bit _______
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The maximum parameters a subroutine can receive (with the help of registers) are
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The second byte in the word designated for one screen location holds
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After the execution of instruction “RET 2”
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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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In 8088 architecture, whenever an element is pushed on the stack
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In STOSB instruction, when DF is Set, SI is
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To convert any digit to its ASCII representation
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Which mathematical operation is dominant during the execution of SCAS instruction
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When an item is pushed on the decrementing stack, the top of the stack 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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After the execution of “PUSH AX” statement
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Regarding assembler, which statement is true:
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19 / 50
JC and JNC test the ____________ flag.
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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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When a 32 bit number is divided by a 16 bit number, the quotient is of
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The first instruction of “COM” file must be at offset:
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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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After the execution of instruction “RET”
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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The iAPX888 architecture consists of _______ register.
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An offset alone is not complete without
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To transfer control back the RET instruction take
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Each screen location corresponds to a word, the lower byte of this word contains ____
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One screen location corresponds to a
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32 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
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_________ is one of the reasons due to which string instructions are used in 8088
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After the execution of MOVS instruction which of the following registers are updated
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While using STOBS, if DF=1 then
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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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ASCII stands for ____________. The screen is two dimensional space having:
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Code Segment is associated to _______ register by default.
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The routine that executes in response to an INT instruction is called
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Which bit of the attributes byte represents the red component of background color ?
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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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The basic function of SCAS instruction is to
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The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
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The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
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The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
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In a video memory, each screen location corresponds to
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The execution of the instruction “mov word [ES: DI], 0x0720”
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Stack is a ______ that behaves in a first in last out manner.
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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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