106. The results of the arithmetic and logic operations are usually placed in which Register?

1. 1. A

   
   
   

   2. C

   
   
   

   3. B

   
   
   

   4. D

   
   
   

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   A

   Correct Option: A

   A

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107. Which of the following instruction can be set to clear the CY flag?

1. 1. XRA A

   
   
   

   2. CLR

   
   
   

   3. AND A

   
   
   

   4. ADD A

   
   
   

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   XRA A

   Correct Option: A

   XRA A

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108. Specify the flag status (CY, S, Z) after the instruction DRA is executed.
     

     MVI	A, A9 H
     MVI	B, 57 H
     ADD	B
     ORA	A

     
     

1. 1. 1, 1, 1

   
   
   

   2. 0, 1, 10

   
   
   

   3. 1, 0, 1

   
   
   

   4. 1, 1, 0

   
   
   

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   1, 1, 1

   Correct Option: A

   1, 1, 1

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109. Specify the contents of register A after the execution of following program—
     

     MVI	A, F8 H
     SUI	69 H
     HLT

1. 1. F8 H

   
   
   

   2. 8F H

   
   
   

   3. 69 H

   
   
   

   4. 96 H

   
   
   

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   8FH
   A: 1111 1000
   69: 0110 1001
   
   1001 1111: 8 F

   Correct Option: B

   8FH
   A: 1111 1000
   69: 0110 1001
   
   1001 1111: 8 F

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110. What will be the O/P, if the following program is executed?
     

     MVI	A, OO H
     DCR	A
     OUT	PORT 1
     HLT

1. 1. OOH

   
   
   

   2. FF H

   
   
   

   3. OOH with CY = 1

   
   
   

   4. Error

   
   
   

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   FF H
   

   Correct Option: B

   FF H
   

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