Interview Questions

Question 1

Things to consider in whiteboard interviews while trying to understand the problem

Answer 1

if the input is a string or an array, could it be empty? If so, what should the output be?
if the input is a number, could it be negative or zero? If so, what should the output be?
if the input is an array, is it sorted?
if the input is a number, could it be an integer or a decimal?
if the input is an array, could it contain duplicate elements?

Question 2

Example Pseudo Code

Answer 2

Define a function named sumAll that takes an array of numbers and returns their sum.

declare variable to hold the sum, initialized at 0
use a loop to iterate through the array from beginning to end
for each number in the array:
add the number to the current sum
assign the result of the addition back to the sum
after the loop completes, return the final value of sum

Question 3

Steps to take when you first get the problem from interviewer

Answer 3

Write down the prompt.
Understand the problem.
Write pseudo-code for a solution.
Translate the pseudo-code to actual code.
Trace the code with example inputs.

Question 4

Common types of technical questions asked

Answer 4

variables
conditionals
loops
primitive data (booleans, numbers, strings)
collections (objects, arrays, and maybe a couple of other data structures)
functions / methods