def toggle_bits(n): # Find MSB position binary_str = bin(n)[2:] msb_pos = len(binary_str) # Create mask to toggle bits mask = (1 << msb_pos) - 1 # Toggle bits using XOR result = n ^ mask return result # Example: n=10 (1010) -> Toggle -> 0101 (5) print(toggle_bits(10)) Use code with caution. 4. Tips for Preparing for TCS Coding Questions
public static String encrypt(String text, int shift) StringBuilder result = new StringBuilder(); for (char character : text.toCharArray()) if (Character.isLetter(character)) char base = Character.isLowerCase(character) ? 'a' : 'A'; result.append((char) ((character - base + shift) % 26 + base)); else result.append(character); return result.toString(); Use code with caution. Preparation Strategy for TCS NQT
Finding the Nth term in mixed numeric series (e.g., a series that alternates between Fibonacci and Prime numbers).
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int evenCount = 0, oddCount = 0; int flag = 0;
An analysis of the 2021 placement papers reveals that TCS coding questions consistently recurred across five major archetypes:
In 2021, the TCS recruitment process revolved around the TCS NQT, a multi-section online test. Understanding the format is essential for effective time management. The exam structure was designed to assess a wide range of skills, from aptitude to technical knowledge. Here is a detailed breakdown of the sections, number of questions, and allotted time: Tcs Coding Questions 2021
The hands-on coding section, which formed the core of this article, focused on implementation-based problems from foundational programming concepts.
Functions like malloc() , calloc() , and free() .
coins. Find the number of ways to pick one coin from each such that their product is an even number Quick Logic: A product is even if at least one of the numbers is even. Total Ways def toggle_bits(n): # Find MSB position binary_str =
The TCS National Qualifier Test (NQT) is a crucial step for placement. In 2021, the coding section generally consisted of to be solved in 45 minutes .
Question 3: Vehicle Production System (Linear Equations / Mathematics)
12 45 33