Tcs Coding Questions 2021 Apr 2026

Example: Input - 1 -> 2 -> 3 -> 4 -> 5, Output - 3

def count_pairs_with_sum(arr, target_sum): count = 0 seen = set()

def first_non_repeating_char(s): char_count = {} for char in s: if char in char_count: char_count[char] += 1 else: char_count[char] = 1 Tcs Coding Questions 2021

return max_sum

for num in arr: current_sum = max(num, current_sum + num) max_sum = max(max_sum, current_sum) Example: Input - 1 -> 2 -> 3

Given an array of integers and a target sum, count the number of pairs with that sum.

Example: Input - [-2, 1, -3, 4, -1, 2, 1, -5, 4], Output - 6 Example: Input - 1 -&gt

Here are some TCS coding questions from 2021, along with a useful piece of code for each:

Given a linked list, find the middle element.

print(count_pairs_with_sum([1, 2, 3, 4, 5], 7)) # Output: 2

Given a string, find the first non-repeating character in it.