CS401-Midterm
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After the execution of MOVS instruction which of the following registers are updated
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The routine that executes in response to an INT instruction is called
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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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Stack is a ______ that behaves in a first in last out manner.
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In 8088 architecture, whenever an element is pushed on the stack
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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one RET is executed, it recovers the values from
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Left-Shift-Operation the left most bit _______
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After the execution of instruction “RET ”
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The maximum parameters a subroutine can receive (with the help of registers) are
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One screen location corresponds to a
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Each screen location corresponds to a word, the lower byte of this word contains ____
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Only instructions allow moving data from memory to memory.
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The iAPX888 architecture consists of _______ register.
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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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Code Segment is associated to _______ register by default.
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Regarding assembler, which statement is true:
18 / 50
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
20 / 50
A 32 Bit processor has accumulator of ---------
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
22 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
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Assembly language is:
24 / 50
allow changing specific processor behaviors and are used to play with it.
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26 / 50
In a video memory, each screen location corresponds to
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The basic function of SCAS instruction is to
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The physical address of the stack is obtained by
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In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
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mov ax,5 has
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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
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The first instruction of “COM” file must be at offset:
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In assembly the CX register is used normally as a ______________register.
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After execution of JCXZ instruction CX will changed with flag affect.
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After the execution of “PUSH AX” statement
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The iAPX88 processor supports ___________ modes of memory access.
37 / 50
REP will always
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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
39 / 50
Which bit of the attributes byte represents the blue component of background color ?
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41 / 50
In the instruction MOV AX, 5 the number of operands are
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43 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
44 / 50
_______ register holds the address of next instruction is to be executed
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After the execution of STOSW the CX will be
46 / 50
The prevalent convention in most high level languages is stack clearing by the
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
48 / 50
If we want to divide a signed number by 2, this operation can better be accomplished by
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50 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
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