TCS NQT Placement Simulation

Capitalize turns "debug" into "Ddebug"

capitalize(word) makes the first letter a capital. Example: capitalize("debug") → "Debug".

Score total turns into NaN

sumScores(players) adds up every player's score. A player with no score counts as 0. Example: [{ score: 10 }, {}, { score: 5 }] → 15.

Playlist shows undefined as the last song

lastSong(playlist) returns the last song. Example: lastSong(["Intro", "Hook", "Outro"]) → "Outro".

Zero counter also counts "" and false

countZeros(values) counts the entries that are the number 0. Example: countZeros([0, "", false, 0]) → 2.

Counting odd numbers freezes on an even one

countOdds(nums) counts the odd numbers. Example: countOdds([1, 2, 3]) → 2.

Counting capitals freezes on a lowercase letter

countUppercase(text) counts the capital letters. Example: countUppercase("aBc") → 1.

isEven says 4 is not even

isEven(n) returns true when n is even and false when it is odd. Example: isEven(4) → true, isEven(3) → false.

Adding shipping gives a list of undefined

withShipping(prices) adds 5 for shipping to every price. Example: withShipping([10, 20]) → [15, 25].

Highest price comes back as NaN

highestPrice(prices) returns the biggest price. Example: highestPrice([3, 7, 2]) → 7.

Prime checker thinks 1 is prime

is_prime(n) returns True if n is a prime number. Example: is_prime(7) → True, is_prime(8) → False, is_prime(1) → False.

AI Attempt: The palindrome checker

An AI assistant wrote this to check if a word reads the same backwards, ignoring capitals. Example: is_palindrome("Racecar") → True, is_palindrome("hello") → False.

Vowel counter skips capital letters

count_vowels(text) counts the vowels, capital or small. Example: count_vowels("Apple") → 2.

AI Attempt: Fibonacci starts one step ahead

An AI assistant wrote this for a recursion exercise. fib(n) returns the nth number in 0, 1, 1, 2, 3, 5, 8 … Example: fib(0) → 0, fib(1) → 1, fib(6) → 8.

AI Attempt: The Two Sum Trap

An AI assistant wrote this for a classic interview question. has_pair_sum(numbers, target) returns True if two different numbers in the list add up to target. Example: has_pair_sum([1, 2, 3], 5) → True, has_pair_sum([5], 10) → False.

Duplicate finder reports each duplicate twice

find_duplicates(nums) lists each repeated value once, in the order it first appears. Example: find_duplicates([1, 2, 2, 3]) → [2].

Word search misses a match at the start

mentions(text, word) returns True if word appears anywhere in text. Example: mentions("hello world", "hello") → True.

Countdown never stops

countdown(n) returns a list counting down from n to 1. Example: countdown(3) → [3, 2, 1].

Average of 1 and 2 comes out as 1

average(nums) returns the average of the numbers, including any decimal part. Example: average([1, 2]) → 1.5.