C Programming & Assembly Language Nptel Week 4 Answers
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C Programming & Assembly Language Nptel Week 4 Answers (July-Dec 2025)
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Question 1. By observing the compiled assembly output, the values of V3, V4, V5, and V6 respectively are:
a) V3 = 5; V4 = 7; V5 = 4; V6 = 8
b) V3 = 8; V4 = 4; V5 = 5; V6 = 7
c) V3 = 4; V4 = 2; V5 = 4; V6 = 9
d) V3 = 8; V4 = 4; V5 = 7; V6 = 5
Question 2. What does the above C code return after execution? (Enter -1 if the executable results in an error after compiling)
Question 3. Based on passing parameters between functions, what are the values of V1 and V2, respectively?
a) V1 = 4; V2 = 8
b) V1 = -4; V2 = -8
c) V1 = 8; V2 = 12
d) V1 = -8; V2 = -12
Question 4. Based on the calling convention used to call the function area shown in the C code, what is the value of V7?
Question 5. If the calling convention of the function area was __cdecl or __stdcall, then, what is the value of V8? (Mark all the correct options)
a) If __stdcall convention, then V8 = 8
b) If __stdcall convention, then V8 = 0
c) If __stdcall convention, then V8 = 16
d) If __cdecl convention, then V8 = 0
e) If __cdecl convention, then V8 = 8
f) If __cdecl convention, then V8 = 16
Question 6. Based on the function main, what is the value of V9?
Question 7. Assembly statement 6 is executed on calling which C statement in the above C code?
a) Statement 3
b) Statement 4
c) Statement 8
d) Statement 9
Question 8. What data types can the above function myprintf handle correctly?
a) int as %d
b) char as %c
c) double as %f
d) string as %s
These are C Programming & Assembly Language Nptel Week 4 Answers
Question 9. The statement 10 of the above C Program translates to the following assembly instructions:lea eax, DWORD PTR [ebp+V1]mov DWORD PTR [ebp+V2], eax
What are the RED highlighted integer V1?
Question 10. What are the RED highlighted integer V2?
Question 11. What is printed after the execution of the above C code?
a) Check: print, Integer: 4, Fraction: 2.167, UF
b) Check: print, Integer: 4, Fraction: 2.167, 4
c) Check: print, Integer: 4, Fraction: 2.17, UF
d) Check: print, Integer: 4, Fraction: 2.17, 4
Question 12. Upon execution of statement 13 of the above C code, is the value 207 in the C variable a secure?
a) No, it can be accessed if a stack snapshot is taken after statement 11 executes.
b) Yes, it is secure, as its value is now changed to 0.
These are C Programming & Assembly Language Nptel Week 4 Answers
Question 13. If statement 13 is changed to val = func(0); then, upon execution of statement 14 of the above C code, is the value 207 in the C variable a secure?
a) No, it can be accessed if a stack snapshot is taken after statement 11 executes.
b) Yes, it is secure as its value is now changed to 0.
Question 14. What is the hidden integer key defined inside the function? (In decimal)
Question 15. What is the correct input password to be entered to the function if the linear transformation of the input is directly compared with the internal key? (In decimal)
These are C Programming & Assembly Language Nptel Week 4 Answers