CS401-Midterm
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The basic function of SCAS instruction is to
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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 iniAPX88 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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one DIV instruction has
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The physical address of the stack is obtained by
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Code Segment is associated to _______ register by default.
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The maximum parameters a subroutine can receive (with the help of registers) are
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REP will always
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“mov byte [num1],5” is _______ instruction.
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one RET is executed, it recovers the values from
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Each screen location corresponds to a word, the lower byte of this word contains ____
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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
14 / 50
The iAPX88 processor supports ___________ modes of memory access.
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JC and JNC test the ____________ flag.
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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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In 8088 architecture, whenever an element is pushed on the stack
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assembly the CX register is used normally as a ______________register.
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After the execution of instruction “RET ”
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In assembly the CX register is used normally as a ______________register.
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After the execution of “PUSH AX” statement
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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 character “A” on screen, color of the character will be
24 / 50
| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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The first instruction of “COM” file must be at offset:
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Which bit of the attributes byte represents the red component of background color ?
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The iAPX888 architecture consists of _______ register.
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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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Left-Shift-Operation the left most bit _______
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one Only ___________ instructions allow moving data from memory to memory.
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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
35 / 50
In STOS instruction, the implied source will always be in
36 / 50
which bit sets the character "blinking" on the screen?
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If we want to divide a signed number by 2, this operation can better be accomplished by
38 / 50
A 32 Bit processor has accumulator of ---------
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
40 / 50
In the word designated for one screen location, the higher address contains
41 / 50
Which bit of the attributes byte represents the blue component of foreground color
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Which mathematical operation is dominant during the execution of SCAS instruction
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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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if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
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47 / 50
The second byte in the word designated for screen location holds
48 / 50
RETF will pop the offset in the
49 / 50
In the instruction MOV AX, 5 the number of operands are
50 / 50
Your score is
The average score is 64%
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