Coding Interview Resources
This channel contains the free resources and solution of coding problems which are usually asked in the interviews. Managed by: @love_data
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Coding Interview Resources (@crackingthecodinginterview) Ingliz til segmentidagi kanali faol ishtirokchi. Hozirda hamjamiyat 52 237 obunachidan iborat bo'lib, Texnologiyalar & Aralashmalar toifasida 2 482-o'rinni va Hindiston mintaqasida 6 824-o'rinni egallagan.
📊 Auditoriya ko‘rsatkichlari va dinamika
невідомо sanasidan buyon loyiha tez o‘sib, 52 237 obunachiga ega bo‘ldi.
27 Avgust, 2026 dagi oxirgi ma’lumotlarga ko‘ra kanal barqaror faollikka ega. Oxirgi 30 kunda obunachilar soni 8 ga, so‘nggi 24 soatda esa 1 ga o‘zgardi va umumiy qamrov yuqori darajada qolmoqda.
- Tasdiqlash holati: Tasdiqlanmagan
- Jalb etish (ER): Auditoriya o‘rtacha 1.85% darajada jalb etiladi. Nashrdan keyingi dastlabki 24 soatda kontent odatda umumiy obunachilar sonining 0.77% ini tashkil etuvchi reaksiyalarni to‘playdi.
- Post qamrovi: Har bir post o‘rtacha 968 marta ko‘riladi; birinchi sutkada odatda 404 ta ko‘rish yig‘iladi.
- Reaksiyalar va o‘zaro ta’sir: Auditoriya faol: har bir postga o‘rtacha 2 ta reaksiya keladi.
- Tematik yo‘nalishlar: Kontent array, stack, algorithm, programming, sort kabi asosiy mavzularga jamlangan.
📝 Tavsif va kontent siyosati
Muallif resursni shaxsiy fikrni ifoda etish maydoni sifatida ta’riflaydi:
“This channel contains the free resources and solution of coding problems which are usually asked in the interviews.
Managed by: @love_data”
Yuqori yangilanish chastotasi (oxirgi ma’lumot 28 Avgust, 2026 da olingan) sababli kanal doimo dolzarb va katta qamrovli bo‘lib qoladi. Analitika auditoriya kontent bilan faol hamkorlik qilishini, uni Texnologiyalar & Aralashmalar toifasidagi muhim ta’sir nuqtasiga aylantirishini ko‘rsatadi.
document.getElementById()
⦁ document.querySelector()
⦁ element.innerHTML (sets HTML content), element.textContent (sets text only), element.style (applies CSS)
Example: document.querySelector('p').textContent = 'Updated text!';
4️⃣ Q: What is event handling in JavaScript?
A:
It allows reacting to user actions like clicks or key presses.
Example:
document.getElementById("btn").addEventListener("click", () => {
alert("Button clicked!");
});
5️⃣ Q: What are arrow functions?
A:
A shorter syntax for functions introduced in ES6.
const add = (a, b) => a + b;
💬 Double Tap ❤️ For Morepython
def length_of_longest_substring(s):
seen = set()
left = max_len = 0
for right in range(len(s)):
while s[right] in seen:
seen.remove(s[left])
left += 1
seen.add(s[right])
max_len = max(max_len, right - left + 1)
return max_len
22. Explain backtracking with N-Queens problem
Backtracking tries placing a queen in each column, then recursively places the next queen if safe. If no safe position is found, it backtracks.
python
def solve_n_queens(n):
result = []
board = [-1]×n
def is_safe(row, col):
for r in range(row):
if board[r] == col or abs(board[r] - col) == abs(r - row):
return False
return True
def backtrack(row=0):
if row == n:
result.append(board[:])
return
for col in range(n):
if is_safe(row, col):
board[row] = col
backtrack(row + 1)
board[row] = -1
backtrack()
return result
23. What is a trie? Where is it used?
A Trie is a tree-like data structure used for efficient retrieval of strings, especially for autocomplete or prefix matching.
Used in:
- Dictionary lookups
- Search engines
- IP routing
24. Explain bit manipulation tricks
- Check if number is power of 2: n & (n - 1) == 0
- Count set bits: bin(n).count('1')
- Swap without temp: x = x ^ y; y = x ^ y; x = x ^ y
25. Kadane’s Algorithm for maximum subarray sum
python
def max_subarray(nums):
max_sum = current = nums[0]
for num in nums[1:]:
current = max(num, current + num)
max_sum = max(max_sum, current)
return max_sum
26. What are heaps and how do they work?
Heap is a binary tree where parent is always smaller (min-heap) or larger (max-heap) than children. Supports O(log n) insert and delete.
Use Python’s heapq for min-heaps.
27. Find kth largest element in an array
python
import heapq
def find_kth_largest(nums, k):
return heapq.nlargest(k, nums)[-1]
28. How to detect cycle in a graph?
Use DFS with visited and recursion stack.
python
def has_cycle(graph):
visited = set()
rec_stack = set()
def dfs(v):
visited.add(v)
rec_stack.add(v)
for neighbor in graph[v]:
if neighbor not in visited and dfs(neighbor):
return True
elif neighbor in rec_stack:
return True
rec_stack.remove(v)
return False
for node in graph:
if node not in visited and dfs(node):
return True
return False
29. Topological sort of a DAG
Used to sort tasks with dependencies.
python
def topological_sort(graph):
visited, result = set(), []
def dfs(node):
if node in visited:
return
visited.add(node)
for neighbor in graph.get(node, []):
dfs(neighbor)
result.append(node)
for node in graph:
dfs(node)
return result[::-1]
30. Implement a stack using queues
python
from collections import deque
class Stack:
def init(self):
self.q = deque()
def push(self, x):
self.q.append(x)
for _ in range(len(self.q) - 1):
self.q.append(self.q.popleft())
def pop(self):
return self.q.popleft()
def top(self):
return self.q[0]
def empty(self):
return not self.q
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