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.