TCS NQT Guide TCS NQT Coding Capability & AlgorithmsString Processing: Palindrome, Anagram, and Substring Algorithms

String Processing: Palindrome, Anagram, and Substring Algorithms

Learn core concepts, essential formulas, and attempt practice questions designed on the latest TCS NQT testing patterns.

Key Concepts & Formulas

1Palindrome: String matches its reversed form (e.g. 'radar').
2Anagram: Two strings have identical character frequencies (e.g. 'listen', 'silent').

Practice Question 1

Which of the following is an anagram of 'TRIANGLE'?

A) INTEGRAL

B) RECTANGLE

C) ALIGNMENT

D) TRIGONOMETRY

Correct Answer: A) INTEGRAL

Step-by-step Solution: 'INTEGRAL' contains the exact same letters as 'TRIANGLE' in different order, making them anagrams.

Practice Question 2

How do you check a string palindrome efficiently?

A) Two-pointer matching from ends

B) Reversing string using auxiliary array

C) Character search

D) Binary search

Correct Answer: A) Two-pointer matching from ends

Step-by-step Solution: Comparing characters using two pointers moving inwards requires no extra memory, running in O(N) time and O(1) space.

Sorting string characters is a simple way to verify anagram properties.