111. What operation can be performed by using the instruction SUBA?

1. 1. Clear the accumulator

   
   
   

   2. Subtract A with borrow

   
   
   

   3. Subtract A

   
   
   

   4. None of the above

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Clear the accumulator Q The command subtracts the contents of register specified from the accumulator
   

   Correct Option: A

   Clear the accumulator Q The command subtracts the contents of register specified from the accumulator
   

---

112. Specify the output at PORT1, after the following program has been executed—
     

     MVI	B, 82 H
     MOV	A, B
     MOV	C, A
     MVI	D, 37 H
     DUT	PORT 1
     HLT

1. 1. 82 H

   
   
   

   2. OO H

   
   
   

   3. 37 H

   
   
   

   4. FF H

   
   
   

---

1. View Hint View Answer Discuss in Forum

   82 H
   ∵ Out PORT command outputs the data whatever is present in Accumulator.

   Correct Option: A

   82 H
   ∵ Out PORT command outputs the data whatever is present in Accumulator.

---

---

113. Which of the following is commonly used to interface I/P devices?

1. 1. Latch

   
   
   

   2. Tri-state buffer

   
   
   

   3. Both (A) and (B)

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Tri-state buffer

   Correct Option: B

   Tri-state buffer

---

114. Which of the following device is commonly used to interface O/P devices?

1. 1. Latch

   
   
   

   2. Tri-state buffer

   
   
   

   3. Both (A) and (B

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Latch

   Correct Option: A

   Latch

---

---

115. In an O/P and I/P port can have the same 8-bit address and data. How does the 8085 differentiate between the ports?

1. 1. Control signals

   
   
   

   2. Peripheral signals

   
   
   

   3. Address bus

   
   
   

   4. Data flow

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Control signals

   Correct Option: A

   Control signals

---