Ask Questions First
Before writing a single line of code, clarify the problem.
What are the constraints? What are the edge cases (e.g.,
empty array, negative numbers)? This is also where you
make a good first impression, which starts with
how to introduce yourself
properly.
State the Obvious Solution
Always mention the simple, brute-force solution first
(e.g., the O(n²) approach). This shows you can solve the
problem, even if inefficiently. Then, analyze its time and
space complexity. This sets the baseline you need to beat.
Discuss Trade-offs and Optimize
This is where you shine. Say, "The brute-force is O(n²),
but we can do better." Discuss your optimal approach. "By
using a
Hash Table, we can get this down to O(n) time, but it will take
O(n) space. This is a good trade-off." Explain *why* your
approach is better before you code it.
Write Clean, Modular Code
Now, implement your optimal solution. Write clean,
readable code with meaningful variable names. Talk through
your logic as you type. Consider breaking down the logic
into helper functions. This skill is essential for any
Full Stack Developer
role.
Verify With an Example
Don't just say "it's done." Manually walk through a simple
example input and trace its execution through your code.
This is the best way to catch off-by-one errors or logical
bugs. It's like solving one of the classic
puzzles in interviews—it shows rigorous thinking.