Interview Query

Fast Interview Questions

IQ Team
Written by IQ Team
IQ Team
Published December 11, 2025
Estimated reading time: 5 minutes

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Data Structures & Algorithms
(1)

Fast Interview Questions

Practice for the Fast interview with these recently asked interview questions.

QuestionTopicDifficulty
Data Structures & Algorithms
Medium

Given two strings, string1 and string2, write a function is_subsequence to find out if string1 is a subsequence of string2.

Bonus: A subsequence is a sequence that can be derived from another sequence by deleting some elements without changing the order of the remaining elements.

Example:

Input:

string1 = 'abc'
string2 = 'asbsc'
string3 = 'acedb'

is_subsequence(string1, string2) -> True
is_subsequence(string1, string3) -> False
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SQL
Easy
Machine Learning
Medium
Statistics
Medium
SQL
Hard
Machine Learning
Medium
Python
Easy
Deep Learning
Hard
SQL
Medium
Statistics
Easy
Machine Learning
Hard

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Fast Salaries by Position

Software Engineer*
$210K
Software Engineer
Median: $210K
Mean (Average): $210K
Data points: 1
Data Scientist*
$170K
Data Scientist
Median: $170K
Mean (Average): $170K
Data points: 1
Base salary
Median
Mean (Average)
* = Low confidence (less than 5 data points)

Most data science positions fall under different position titles depending on the actual role.

From the graph we can see that on average the Software Engineer role pays the most with a $210,000 base salary while the Data Scientist role on average pays the least with a $170,000 base salary.

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