Sayan Biswas

Junior Analyst

Has solved a first real set of interview questions.

Practicing since October 20261-day streak

Points

865

Questions solved

35

Projects finished

0

Longest streak

3 days

Badges

• First question
• 10 questions
• 25 questions
• 3-day streak

Skills

Skill map

Every topic in the question bank, and how much of each one Sayan has worked through.

• Query foundations

  Learning · 19 of 69

  Reading a table and asking it a straight question.

  • Dates7/16
  • Conditional logic7/12
  • Strings0/11
  • Calculations0/10
  • NULL handling1/9
  • Filtering4/7
  • Logical operators0/4

• Combining data

  Learning · 4 of 36

  Putting tables together without losing or duplicating rows.

  • Joins2/15
  • Reshaping0/15
  • Subqueries1/5
  • Deduplication1/1

• Aggregation and windows

  Learning · 12 of 71

  Summarizing, ranking and comparing rows against their group.

  • Window functions2/32
  • Ranking4/15
  • Aggregations5/14
  • Running totals1/10

• Python foundations

  Not started · 0 of 21

  The data structures every Python interview leans on.

  • Arrays0/6
  • Lists0/5
  • Tuples0/3
  • Dictionaries0/3
  • Math0/3
  • Sorting0/1

• Algorithms

  Not started · 0 of 17

  The patterns behind the timed screening rounds.

  • Hashing0/8
  • Two pointers0/4
  • Binary search0/4
  • Sliding window0/1

Certificates

• Junior Analyst

  Earned Oct 20, 2026

  Open certificate

Projects

No Data Labs projects posted yet.