C Programming & Assembly Language Nptel Week 2 Answers
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C Programming & Assembly Language Nptel Week 2 Answers (July-Dec 2025)
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Question 1. What expression will the register EAX bear immediately after the execution of statement 11?
a) EAX = (n & p) & ((t ⊕ e) | l)
b) EAX = (n | p) ⊕ ((t & e) | l)
c) EAX = (n | p) & ((t ⊕ e) | l)
d) EAX = (n | p) ⊕ ((t | e) & l)
Question 2. What value will the register EAX bear (in decimal) immediately after the execution of statement 11?
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Question 3. What value is present in the register EAX (expressed in decimal) when the code is run?
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Question 4. If in the above code, x is replaced with 0x80000000, what is the value present in the register EAX (in decimal) when the code is run?
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Question 5. Which of the following can be used to detect the end of a string present in the data segment in assembly?
a) CMP EBX 0x00, where EBX holds the values of 4 characters at once
b) CMP BL 0x00, where the value of a character is loaded in BL
c) CMP BYTE PTR [EBX] 0x00, where the pointer to the character is loaded in EBX
d) None of these
These are C Programming & Assembly Language Nptel Week 2 Answers
Question 6. Which of the following C statements do not get compiled to assembly statements when compiled for maximum optimizations?
a) statement 3
b) statement 4
c) statement 5
d) statement 6
e) None of the above
Question 7. If statement 7 was changed to return g, then which of the following C statements are not compiled to assembly statements when compiled for maximum optimizations?
a) statement 3
b) statement 4
c) statement 5
d) statement 6
e) None of the above
These are C Programming & Assembly Language Nptel Week 2 Answers
Question 8. How many basic ALU operations (Addition, Subtraction, Multiplication and Division) are performed during execution of the above un-optimized code?
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Question 9. How many basic ALU operations (Addition, Subtraction, Multiplication and Division) are performed during execution when maximum optimization is applied to the above code?
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Question 10. After the execution of the following code snippets, what is the value by which the variables pA and value stored in eax are incremented respectively?
a) 4, 8
b) 2, 4
c) 4, 1
d) 4, 4
e) None of the above
Question 11. Which of the following is the purpose of the assembly statement 3?
a) To initialise the C variable parity
b) To load the register EDX with the value of C variable n
c) To load the register EDX with the address of the C variable n
d) To load the register EDX with the value in the address pointed by the C variable n
Question 12. Which of the following assembly statement(s) implement the functionality of the C statement 6?
a) statement 9
b) statement 10
c) statement 11
d) statement 12
These are C Programming & Assembly Language Nptel Week 2 Answers
Question 13. Statement 12 in the assembly code maps to C statement _______.
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Question 14. If Parity is called from main, as shown below, it will print out output = _______ ?
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Question 15. If statement 1 of the C code is changed to bool Parity(short int n), then which of the following statements of the compiled assembly code change?
a) 3
b) 5
c) 11
d) 14
Question 16. Mark the valid option/s that will be printed once the above C program is executed.
a) Print = 63, 47 Return_Value = 63
b) Print = 47, 63 Return_Value = 47
c) Print = 53, 63 Return_Value = 63
d) Print = 47, 63 Return_Value = 63
These are C Programming & Assembly Language Nptel Week 2 Answers
Question 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) a = 63, b = 47
b) a = 47, b = 47
c) a = 47, b = 63
d) a = 63, b = 63
Question 18. Mark the valid option/s that will be printed once the above C program is executed.
a) Print = 63, 47
b) Print = 47, 47
c) Print = 63, 63
d) Print = 47, 63
Question 19. Mark the valid option/s that will be printed once the above C program is executed.
a) Print = 63, 47
b) Print = 63, 63
c) Print = 47, 47
d) Print = 47, 63
These are C Programming & Assembly Language Nptel Week 2 Answers