Google & Microsoft Interview Questions For 2025: Stack And Queue Problems

Stack Problems:

Next Greater Element – https://lnkd.in/dHF2MQYj
Largest Rectangle in Histogram – https://lnkd.in/dPThG46V
Trapping Rain Water – https://lnkd.in/dXBFHC7a
Min Stack – https://lnkd.in/dWj4a_sz
Evaluate Reverse Polish Notation – https://lnkd.in/dGjnYXYH
Basic Calculator I – https://lnkd.in/das5ZEjh
Valid Parentheses – https://lnkd.in/dz7Y9kQq
Asteroid Collision – https://lnkd.in/d89athmy
Daily Temperatures – https://lnkd.in/d3-yDATy
Remove K Digits – https://lnkd.in/dsjQ3r6d
Decode String – https://lnkd.in/d99wjnxm
132 Pattern – https://lnkd.in/df6zs3Pc
Online Stock Span – https://lnkd.in/dVuuej-2
Car Fleet – https://lnkd.in/dZCeb6BN
Next Greater Element II – https://lnkd.in/d4bGepc7

Queue & Deque Problems:

Sliding Window Maximum – https://lnkd.in/d-cnF5_y
LRU Cache – https://lnkd.in/dSef2nVS
LFU Cache – https://lnkd.in/dKT3PcET
Number of Recent Calls – https://lnkd.in/ddJTcr-r
Implement Queue using Stacks – https://lnkd.in/d5gNt2Fg
Design Circular Queue – https://lnkd.in/d5EHAZuX
Design Front Middle Back Queue – https://lnkd.in/dZa6SjmF
Jump Game VI (Monotonic Queue) – https://lnkd.in/d5ayciW5
Shortest Subarray with Sum at Least K – https://lnkd.in/dBi5u55k
Rotting Oranges – https://lnkd.in/drjkG6F5
The Maze II – https://lnkd.in/dQzRHwyk
Maximal Rectangle – https://lnkd.in/d_Fsq42i
Max Sum of Rectangle No Larger Than K – https://lnkd.in/dtfBu4hn
All O`one Data Structure – https://lnkd.in/dFj6QKR9
Shortest Path in Binary Matrix – https://lnkd.in/dSscn-tH

You Should Know:

Here are some practical commands and code snippets related to stack and queue problems:

1. Stack Implementation in Python:

stack = []
stack.append(1) # Push
stack.append(2)
print(stack.pop()) # Pop
print(stack[-1]) # Peek

2. Queue Implementation in Python:

from collections import deque
queue = deque()
queue.append(1) # Enqueue
queue.append(2)
print(queue.popleft()) # Dequeue

Linux Command to Monitor System Processes (Queue-like behavior):
```
top
```
Windows Command to Check System Logs (Stack-like behavior):
```
eventvwr
```

5. Bash Script to Simulate a Stack:

stack=()
stack+=("item1")
stack+=("item2")
echo ${stack[-1]} # Peek
unset 'stack[${#stack[@]}-1]' # Pop

What Undercode Say:

Mastering stack and queue problems is essential for cracking technical interviews at top tech companies like Google and Microsoft. These data structures are foundational for solving complex algorithmic challenges, such as parsing expressions, managing caches, and optimizing sliding window problems.

To deepen your understanding, practice implementing stacks and queues in different programming languages and explore their applications in real-world systems, such as process scheduling in operating systems or managing network packets. Additionally, familiarize yourself with Linux and Windows commands that simulate stack and queue behaviors, as they are often used in system administration and debugging.

For further reading, explore the provided URLs to dive deeper into each problem and its solution. Happy coding!