Instruction SET

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Question 1 of 21
1. Question
Atmega328P is ___ pin PDIP
- 23
- 28
- 32
- 24
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Question 2 of 21
2. Question
All Port pins cannot be used as digital input/output
- False
- True
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Question 3 of 21
3. Question
In AVR microcontrollers, ADD instruction affects the status of which of the following bits of a status register?
- Z
- C
- N
- All the above
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Question 4 of 21
4. Question
ADC instruction is used for?
- add with carry
- analog to digital conversion
- automatic digital control
- none of the mentioned
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Question 5 of 21
5. Question
AVR supports which of the following mentioned subtraction instructions?
- SUB
- SBC
- SUBI
- All of the mentioned
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Question 6 of 21
6. Question
What steps are involved when we subtract two numbers present at two different locations?
- take the two’s complement of the subtrahend
- add it to the minuend
- invert the carry
- All of the mentioned
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Incorrect
Question 7 of 21
7. Question
In executing subtraction based instructions, state the role of the C flag?
- if C=1, the result is negative
- if C=1, the result is positive
- none of the mentioned
- All the above mentioned
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Question 8 of 21
8. Question
Which of the following is correct about the MUL instruction?
- it is a byte-by-byte multiplication instruction
- the product is stored in two registers R1 and R0
- all of the mentioned
- none of the mentioned
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Question 9 of 21
9. Question
In AVR, when is the V flag set?
- there is a carry from D7 bit
- there is a carry from D6 to D7 bit
- when carry is generated only from D6 to D7 or carry is generated only from D7
- none of the mentioned
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Question 10 of 21
10. Question
To set the bits of a register R1 to 1, we must OR the contents of the register with?
- 00H
- 11H
- FFH
- 0FH
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Question 11 of 21
11. Question
CP instruction alters the value of the register?
- True
- False
- none of the mentioned
- can’t be said
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Question 12 of 21
12. Question
What is right about the ROR instruction?
- it rotates the contents of the register left to right
- it rotates the contents of the register from right to left
- it rotates the contents of the register from left to right through carry
- it rotates the contents of the register from right to left through carry
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Question 13 of 21
13. Question
Which of the following is not a single bit instruction in AVR?
- SBI
- PORT
- CBI
- All of the mentioned
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Question 14 of 21
14. Question
Which of the following is correct about the SBIS instruction?
- it is used to monitor status of bit in I/O register
- it is a byte oriented instruction
- it is a 4 byte instruction
- all of the mentioned
Correct
Incorrect
Question 15 of 21
15. Question
Instruction CBI PORTB,1 means
- clearing the PORTB register
- clearing the first bit of the PORTB register
- setting the PORTB register
- setting the first bit of the PORTB register
Correct
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Question 16 of 21
16. Question
Which of the following instruction can be used to toggle a bit of the PORT?
- SBI
- CBI
- SBI & CBI
- None of the mentioned
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Question 17 of 21
17. Question
What is the main function of the SBIC instruction?
- it is used to clear a particular bit of a port
- it is used to jump unconditionally
- it is used to skip the instruction if a particular bit of a port is zero
- none of the mentioned
Correct
Incorrect
Question 18 of 21
18. Question
Which of the following is correct about BRNE instruction in AVR microcontrollers?
- it is used to compare two registers
- it is used to compare two values
- it is used to check the zero flag
- it is used to jump to the given mentioned label when the zero flag accounts to 0
Correct
Incorrect
Question 19 of 21
19. Question
Which of the following statements are correct about the RCALL instruction?
- it is a 2 byte instruction
- it is a 4 byte instruction
- it is a 16 byte instruction
- none of the mentioned
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Question 20 of 21
20. Question
Which of the following statements is true?
- CALL instruction is used to transfer control anywhere in the 4M memory space
- PUSH instruction is used to take out the value from the stack into some register
- POP instruction is used to jump to any location
- RCALL is a 4 byte instruction
Correct
Incorrect
Question 21 of 21
21. Question
In the JMP instruction, how many bits are there for determining the target address?
- 16
- 32
- 22
- 10
Correct
Incorrect

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