56. The highest priority in 8085 micropr ocessor system is

1. 1. RST 7.5

   
   
   

   2. RST 6.5

   
   
   

   3. INTR

   
   
   

   4. TRAP

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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57. In 8085 microprocessor system, the direct addressing instruction is

1. 1. MOV A, B

   
   
   

   2. MOVB, OAH

   
   
   

   3. MOV C, M

   
   
   

   4. STA addr

   
   
   

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   NA

   Correct Option: D

   NA

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58. An interrupt in which the external device supplies its address as well as the interrupt request, is known as

1. 1. vectored interrupt

   
   
   

   2. maskable interrupt

   
   
   

   3. polled interrupt

   
   
   

   4. non-maskable interrupt

   
   
   

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   NA

   Correct Option: C

   NA

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59. In 8085 microprocessor, the value of the most significant bit of the result following the execution of any arithmetic or Boolean instruction is stored in the

1. 1. carry status flag

   
   
   

   2. auxiliary carry status flag

   
   
   

   3. sign status flag

   
   
   

   4. zero status flag

   
   
   

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   NA

   Correct Option: C

   NA

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60. Following program is written for an 8085 microprocessor to add two bytes located at memory addresses 1FFE and 1FFF
    LXI H, 1FFF
    MOV      B, M
    INR      L
    MOV      A,M
    ADD      B
    INR      L
    MOV      M, A
    XOR      A
    On completion of the execution of the program, the result of addition is found

1. 1. in the register A

   
   
   

   2. at the memory address 1000

   
   
   

   3. at the memory address 1F00

   
   
   

   4. at the memory address 2000

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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