Q21Single correct5 Marks1 Sep 2024

The following pseudocode is executed using the "Scores" dataset. What will $first(D[i]) - last(D[i])$ represent for a given key i ? ``` D = {} while(Table 1 has more rows){ Read the first row X in Table 1 if(isKey(D, X.Town/City)){ if(first(D[X.Town/City]) < X.Mathematics){ D[X.Town/City] = [X.Mathematics, last(D[X.Town/City])] } if(last(D[X.Town/City]) > X.Mathematics){ D[X.Town/City] = [first(D[X.Town/City]), X.Mathematics] } } else{ D[X.Town/City] = [X.Mathematics, X.Mathematics] } Move X to Table 2 } ```

A

The difference between highest and lowest Mathematics marks of the city i

B

The difference between overall highest and lowest Mathematics marks of the dataset

C

The difference between highest and second highest Mathematics marks of the city i

D

It will be always 0