Programming, Data Structures And Algorithms Using Python Week 4 NPTEL Assignment Answers 2025

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✅ Subject: Programming, Data Structures And Algorithms Using Python (nptel programming, DSA using python answers)
📅 Week: 4
🎯 Session: NPTEL 2025 July-October
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Programming, Data Structures And Algorithms Using Python Week 4 NPTEL Assignment Answers 2025

1. Consider the following Python function.

def mystery(l):
if l == []:
return(l)
else:
return(l[-1:]+mystery(l[:-1]))

What does mystery([23,35,19,58,93,46]) return?

Answer : See Answers

2. What is the value of pairs after the following assignment?

pairs = [ (x,y) for x in range(6,1,-1) for y in range(3,1,-1) if (x+y)%2 == 0 ]

Answer :

3. Consider the following dictionary.

goals = {“Country”:{“Ronaldo”:123,”Messi”:103,”Pele”:83},”Club”:{“Ronaldo”:[512,51,158],”Pele”:[604,49,26]}}

Which of the following statements does not generate an error?

• goals[“Club”][“Messi”][0:] = [496,71,145]
• goals[“Club”][“Messi”].extend([496,71,145])
• goals[“Club”][“Messi”] = [496,71,145]
• goals[“Club”][“Messi”] = goals[“Club”][“Messi”] + [496,71,145]

Answer :

4. Assume that wickets has been initialized as an empty dictionary:

wickets = {}

Which of the following generates an error?

• wickets[“Muralitharan, tests”] = 800
• wickets[“Muralitharan”] = {“tests”:800}
• wickets[(“Muralitharan”,”tests”)] = 800
• wickets[[“Muralitharan”,”tests”]] = 800

Answer : See Answers