NPTEL C Programming And Assembly Language Week 2 Assignment Solutions
NPTEL C Programming And Assembly Language Week 2 Assignment Answers 2023
1. What expression will the register EAX bear immediately after the execution of statement 11?
- EAX=((a&b)|x)⊕(x&y)
- EAX=(a|b|x)⊕(x+y)
- EAX=((a&b)|x)⊕(x+y)
- EAX=(a|b+x)⊕(x|y)
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2. What value will the register EAX bear immediately after the execution of statement 11?
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3. If after statement 11, we added the statements
what value will the register EDX bear immediately after the execution of statement 13?
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4. What is the value in EAX when the program reaches statement 14?
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5. If the instructions were executing on a 32-bit processor, what is the largest value one can assign to N in statement 3 such that the program reaches statement 14 without an overflow of the accumulator in statement 9?
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6. Let the answer to question 5 be k. If we replace N=5 (in statement 3) by N=k, what is the value in EAX when the program reaches statement 14?
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7. Which of the following C statements do not get compiled to assembly statements when compiled for maximumoptimizations ?
- statement 3
- statement 4
- statement 5
- statement 6
- statement 7
- None of the above
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8. If statement 4 was changed to a=s+z and statement 6 was changed to r=a−s , then which of the following C statements do not get compiled to assembly statements when compiled for maximumoptimizations ?
- statement 3
- statement 4
- statement 5
- statement 6
- statement 7
- None of the above
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9. If statement 7 was changed to return x , then which of the following C statements do not get compiled to assembly statements when compiled for maximumoptimizations ?
- statement 3
- statement 4
- statement 5
- statement 6
- statement 7
- None of the above
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10. After the execution of the following code snippet, what is the value by which the pointer variables pB and pA are incremented respectively?
- 4, 8
- 4, 4
- 2, 8
- 8, 4
- None of the above
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11. Which of the following is the purpose of the assembly statement 3?
- To initialise the C variable count
- To load the register ECX with the value of C variable count
- To load the register ECX with the address of the C variable pA
- To load the register ECX with the value in the address pointed by the C variable pA
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12. Which of the following assembly statement(s) implement the functionality of the C statement 4?
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13. Statement 5 in the C code maps to assembly statement _____.
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14. If arrlenfn is called from main, as shown below, it will print out len= ______?
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15. If statement 1 of the C code is changed to int arrlenfn(short int pA), then which of the following will statement 5 of the compiled assembly code change to?
- cmp WORD PTR [ecx+eax2], 0
- cmp DWORD PTR [ecx+eax2], 0
- cmp WORD PTR [ecx+eax4], 0
- cmp DWORD PTR [ecx+eax*4], 0
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16. Mark the valid option/s that will be printed once the above C program is executed.
- Print=160,60
- Return Value=160
- Print=60,160
- Return Value=60
- Print=160,160
- Return Value=160
- Print=60,160
- Return Value=160
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17. What is the value in the C variables a and b after statement 6 executes? (Assume that the main() function is executed first and control has been transferred to the function swap(int x, int y))
- a=160, b=60
- a=60, b=60
- a=60, b=160
- a=160, b=160
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18. What is the value in the C variables a and b after statement 7 executes? (Assume that the main() function is executed first and control has been transferred to the function swap(int x, int y ))
- a=60, b=160
- a=60, b=60
- a=160, b=60
- a=160, b=160
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19. Mark the valid option/s that will be printed once the above C program is executed.
- Print=160,60
- Print=60,60
- Print=160,160
- Print=60,160
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