Easy Collections Question 50 of 215

When do you prefer List over array in C#?

.NET / C# · Speak this in 60–90 seconds · Faridabad & Delhi NCR

01234

Index starts at 0. Scan once for max — O(n).

List grows dynamically and has helpful methods.

Why interviewers care about Collections:

They are checking judgment

on Collections.

A good answer names

the situation, the default choice, and one exception - that reads as experience.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before you speak the answer, walk the interviewer through these steps:

1
List grows dynamically and
has helpful methods.
2
Arrays are fixed size
and slightly leaner.
3
I start with List
unless a fixed buffer or span-friendly API needs an array.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“Arrays are fixed size and slightly leaner.”

Break into beats

Arraysarefixedsizeandslightly

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

List grows dynamically and has helpful methods. Arrays are fixed size and slightly leaner.