Assembly Language UPDATED Exam Questions and CORRECT Answers

Assembly Language UPDATED Exam
Questions and CORRECT Answers

What is the largest positive value that may be stored in 20 bits? - CORRECT ANSWER-


Why learn assembly language? - CORRECT ANSWER- Precise control timing
Optimize memory


myBytes BYTE 80h,66h,0A5h
mov al,myBytes
add al,[myBytes+2]


Evaluation of al? - CORRECT ANSWER- 0A5h


array WORD 8000h,6600h,4400h
mov ax,array
add ax,[array+2]


Evaluation of ax? - CORRECT ANSWER- 6600


Unsigned Byte Range - CORRECT ANSWER- 0 to 255
0 to (2^8 - 1)


Unsigned word range - CORRECT ANSWER- 0 to (2^16 - 1)


Unsigned doubleword range - CORRECT ANSWER- 0 to (2^32 - 1)


Signed byte range - CORRECT ANSWER- - 128 to + 127
- 2^7 to (2^7 - 1)

, Signed word range - CORRECT ANSWER- - 2^15 to (2^15 - 1)


Signed doubleword range - CORRECT ANSWER- - 2^31 to (2^31 - 1)


Converting from unsigned Decimal to Hexadecimal - CORRECT ANSWER- Repeatedly
divide the decimal value by 16. Each remainder is a hexadecimal digit.
(Last remainder obtained is the first hexadecimal digit)


Convert Unsigned Decimal to Binary - CORRECT ANSWER- Repeatedly divide the decimal
value by 2. Each remainder is a binary digit.(Last remainder obtained is the first binary
digit)"


Obtaining 2's complement notation - CORRECT ANSWER- Invert bits.
Add 1


Hexadecimal number is positive if: - CORRECT ANSWER- MSB ≤ 7


Hexadecimal number is negative if: - CORRECT ANSWER- MSB ≥ 8


Converting Signed Decimal to Binary - CORRECT ANSWER- 1. Convert absolute value of
the decimal to binary.
2. If the original decimal integer was negative, create the two's complement of the binary
number from the previous step


Translate -4 to binary - CORRECT ANSWER- Binary representation of unsigned 4: 0100
Two's complement of 0100: 1100
decimal -4 = 1100 binary


CPU (Central Processor Unit)
Components: - CORRECT ANSWER- Clock
Control unit (CU)