CS401-Midterm
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The iAPX888 architecture consists of _______ register.
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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Which bit of the attributes byte represents the blue component of background color ?
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To transfer control back the RET instruction take
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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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A 32 Bit processor has accumulator of ---------
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The execution of the instruction “mov word [ES: DI], 0x0720”
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In 8088 architecture, whenever an element is pushed on the stack
9 / 50
The physical address of the stack is obtained by
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REP will always
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When a 32 bit number is divided by a 16 bit number, the quotient is of
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Assembly language is:
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In the Rotate Right Operation every bit moves one position to right and the bit dropped from the right is inserted at the left and:
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The basic function of SCAS instruction is to
15 / 50
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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Stack is a ______ that behaves in a first in last out manner.
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decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
20 / 50
After the execution of “PUSH AX” statement
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The maximum parameters a subroutine can receive (with the help of registers) are
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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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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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After the execution of STOSW, the CX will be
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26 / 50
JC and JNC test the ____________ flag.
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ASCII stands for ____________. The screen is two dimensional space having:
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After the execution of instruction “RET ”
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To convert any digit to its ASCII representation
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The routine that executes in response to an INT instruction is called
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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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All the addressing mechanisms iniAPX88 return a number called ______ address.
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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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35 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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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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Left-Shift-Operation the left most bit _______
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After the execution of STOSW the CX will be
39 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
40 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
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Which bit of the attributes byte represents the red component of background color ?
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Each screen location corresponds to a word, the lower byte of this word contains ____
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44 / 50
_________ is one of the reasons due to which string instructions are used in 8088
45 / 50
Code Segment is associated to _______ register by default.
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Only instructions allow moving data from memory to memory.
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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49 / 50
“mov byte [num1],5” is _______ instruction.
50 / 50
The iAPX88 processor supports ___________ modes of memory access.
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