Allegis Group Senior Analyst Interview Questions and Answers

Aptitude test based on RS Agarwal and similar numerical types

Q1. Reverse a link list and reverse a string
Ans. 
Reverse a linked list and reverse a string
• To reverse a linked list, iterate through the list and change the pointers to reverse the order

• To reverse a string, use a loop to iterate through the characters and build a new string in reverse order

• Example: Linked list 1->2->3->4 can be reversed to 4->3->2->1

• Example: String 'hello' can be reversed to 'olleh'
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Q2. Check for weighted sum
Ans. 
The question is asking to calculate the weighted sum of a set of values.
• Calculate the product of each value with its corresponding weight

• Sum up all the products to get the weighted sum

• Example: Values [2, 3, 4] with weights [0.5, 0.3, 0.2] would result in (2*0.5) + (3*0.3) + (4*0.2) = 1 + 0.9 + 0.8 = 2.7
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