Statement The following pseudocode is executed using the “Scores” dataset. At the end of the execution, count captures the number of pairs of students having either same gender or from the same city but not both. But the pseudocode may have mistakes. Identify all such mistakes (if any). Assume that all statements not listed in the options below are free of errors. [MSQ] 1 count = 0 2 while(Table 1 has more rows){ 3 Read the first row X in Table 1 4 Move X to Table 2 5 while(Table 1 has more rows){ 6 Read the first row Y in Table 1 7 Move Y to Table 3 8 count = count + findPair(X, Y) 9 } 10 Move all rows from Table 3 to Table 1 11 } 12 Procedure findPair(X, Y) 13 A = False, B = True 14 if(X.Gender == Y.Gender){ 15 A = True 16 } 17 if(X.CityTown == Y.CityTown){ 18 B = True 19 } 20 if((A and not B) and (not A and B)){ 21 return(1) 22 } 23 return(0) 24 End findPair

(A) Line 13: Incorrect initialisation of B

(C) Line 20: Incorrect condition

(B) Line 18: Incorrect update of B

(D) Line 21: It should return(0)

Computational Thinking · Qualifier · 16 Mar 2025 · January 2025 term

Question 11: Statement The following pseudocode is executed using the…

Question 11

+5 marksOne or more correct options

Statement

The following pseudocode is executed using the “Scores” dataset. At the end of the execution, count captures the number of pairs of students having either same gender or from the same city but not both. But the pseudocode may have mistakes. Identify all such mistakes (if any). Assume that all statements not listed in the options below are free of errors. [MSQ]

text

1 1  count = 0
2 2  while(Table 1 has more rows){
3 3      Read the first row X in Table 1
4 4      Move X to Table 2
5 5      while(Table 1 has more rows){
6 6          Read the first row Y in Table 1
7 7          Move Y to Table 3
8 8          count = count + findPair(X, Y)
9 9      }
1010      Move all rows from Table 3 to Table 1
1111  }
1212  Procedure findPair(X, Y)
1313      A = False, B = True
1414      if(X.Gender == Y.Gender){
1515          A = True
1616      }
1717      if(X.CityTown == Y.CityTown){
1818          B = True
1919      }
2020      if((A and not B) and (not A and B)){
2121          return(1)
2222      }
2323      return(0)
2424  End findPair

Select all that apply.

A
Line 13: Incorrect initialisation of B
B
Line 18: Incorrect update of B
C
Line 20: Incorrect condition
D
Line 21: It should return(0)

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Correct answers

A
Line 13: Incorrect initialisation of B
C
Line 20: Incorrect condition

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Question 11 of 12 in the IIT Madras BS Computational Thinking (Computational Thinking (CT)) Qualifier paper sat on 16 Mar 2025, in the January 2025 term (IIT M QUALIFIER AN EXAM QDQ1 16 Mar 2025). It carries 5 marks.

Question 11: Statement The following pseudocode is executed using the…

Question 11

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