Use the following data definitions for questions 6-12. Which of the following in

Question

Use the following data definitions for questions 6-12. Which of the following instructions is valid: mov a1,0FFFFh mov a1, word1 mov word1, 10000h mov ax, [word1+2] Which of the following instructions is invalid: movzx ax, byte1 movzx edx, b1 movzx word1, a1 movsx dx, a1 Which of the following instructions is invalid: mov bx, ax mov ax, (word1+1) mov byte2, byte1 mov ax, 1000h What is the hexadecimal value of register ax after the instruction movzx ax, [byte 1 + 2). 10h 20h 30h None of the above What is the hexadecimal value of register eax after the instruct ion mov ax. (word1 + 1] 1200h 3400h 5600h None of the above What b the hexadecimal value of register ax after the instruction mov a1, byte1 + 1 10h 11h 20h 21h What is the hexadecimal value of register ax after the instruction xchg ax, [word1+2] 12h 34h 56h None of the above

Explanation / Answer

Answer:

6. b and d -------> are vaild

7. b and c --------->are invalid

8. a and c ---------->are invalid

9. b -------------------> i.e 20h

10. d ------------------->i.e none of the above(5678h)

11. b -------------------->i .e 11h

12. a --------------------->i.e 12h

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