What interview questions does Block ask?

Candidates have reported 5 questions from Block interviews to TrueInterview: 4 algorithm and 1 object-oriented programming. Each one is filed under the round it came up in, with the month it was reported where a candidate gave one, and opens in the workspace that format calls for — an editor judged against hidden tests for coding and SQL, a whiteboard for system design.

How recent are these Block interview questions?

The most recent Block question on this page was reported in September 2026. A question shows the month a candidate reported it whenever that is known, so an entry that has gone stale is visible as one rather than presented as current.

Which Block interview rounds do these questions come from?

The reported Block questions on this page are filed under 3 rounds: Online Assessment, Phone Screen and Onsite. Filtering by a round gives you the questions candidates were asked at that stage rather than the whole bank at once.

How hard are Block's interview questions?

Of the 5 rated Block questions on this page, the spread is 2 easy and 3 medium. Difficulty is the rating on the question itself, not a prediction of how a particular loop will go.

Where do these Block interview questions come from?

From candidates who sat the interview. Some send us their questions by email or upload; the rest we summarize from interview experiences, on the public board or published elsewhere, then verify and file by company, format and round. Nothing covered by an NDA is accepted, and the sourcing rules are published in full at /methodology.

Has anyone written up their Block interview?

Yes — 3 candidates have published an account of a Block loop, covering the rounds they sat, what they were asked and how it ended. Each write-up has its own page and links to the questions it mentions.

Is there a guide to the Block interview process?

There is one guide filed under Block on this page, written round by round: what each stage covers, what it is assessing, and what to practise before it.

Do I need an account to practise Block questions?

Browsing this page needs no account, and 2 of the 5 Block questions listed here open in full for free. The rest are part of a paid plan, and every row says which it is before you click it.

Block Interview Questions: 5 Real Questions

About Block

Block, Inc. is the payments and financial-services company behind Square, Cash App and its bitcoin businesses, founded in 2009 by Jack Dorsey and Jim McKelvey as Square and renamed Block in December 2021. It trades on the NYSE and operates across dozens of countries.

Industry: Payments & financial services
Founded: 2009
Size: 5,000+ employees
HQ: San Francisco, CA
Website: block.xyz

Company research

Read it

Block, Inc. is the payments and financial-services company behind Square, Cash App and its bitcoin businesses, founded in 2009 by Jack Dorsey and Jim McKelvey as Square and renamed Block in December 2021. It trades on the NYSE and operates across dozens of countries.

Payments & financial services
San Francisco, CA
Founded 2009
Public

Covered in the research, each with its source

Technology and AI
Recent moves

Read the Block research

Block hiring insights

Computed from candidates’ write-ups and our Block questions.

Reported outcomes

—

None of the 3 shared loops have reached a stated decision yet.

Outcome mix

Still waiting100%(3)

Across the 3 of 3 shared loops that stated an outcome.

Last 12 months: 2 loops
Most recent: Dec 2025

Self-reported by candidates who shared a Block write-up. It describes those loops, not an application-to-offer rate. Read them.

What they ask

Topic mix

Arrays33%(1)
Dynamic Programming33%(1)
Matrix33%(1)

Across the 3 of 5 Block questions tagged with a topic.

Difficulty mix

Easy40%(2)
Medium60%(3)

Across the 5 of 5 questions with a difficulty rating.

Practice this mix

Interview guides1

Block Interview Process & QuestionsFree

Open roles at Block87

Show all 87 Block roles

Interview experiences3

View all

Interview questions5

Filter & trackFilter

Algorithm4 OOP1 OA1 Phone Screen2 Onsite2 Easy2 Medium3

Frequently asked: Block interviews

What interview questions does Block ask?: Candidates have reported 5 questions from Block interviews to TrueInterview: 4 algorithm and 1 object-oriented programming. Each one is filed under the round it came up in, with the month it was reported where a candidate gave one, and opens in the workspace that format calls for — an editor judged against hidden tests for coding and SQL, a whiteboard for system design.
How recent are these Block interview questions?: The most recent Block question on this page was reported in September 2026. A question shows the month a candidate reported it whenever that is known, so an entry that has gone stale is visible as one rather than presented as current.
Which Block interview rounds do these questions come from?: The reported Block questions on this page are filed under 3 rounds: Online Assessment, Phone Screen and Onsite. Filtering by a round gives you the questions candidates were asked at that stage rather than the whole bank at once.
How hard are Block's interview questions?: Of the 5 rated Block questions on this page, the spread is 2 easy and 3 medium. Difficulty is the rating on the question itself, not a prediction of how a particular loop will go.
Where do these Block interview questions come from?: From candidates who sat the interview. Some send us their questions by email or upload; the rest we summarize from interview experiences, on the public board or published elsewhere, then verify and file by company, format and round. Nothing covered by an NDA is accepted, and the sourcing rules are published in full at /methodology.
Has anyone written up their Block interview?: Yes — 3 candidates have published an account of a Block loop, covering the rounds they sat, what they were asked and how it ended. Each write-up has its own page and links to the questions it mentions.
Is there a guide to the Block interview process?: There is one guide filed under Block on this page, written round by round: what each stage covers, what it is assessing, and what to practise before it.
Do I need an account to practise Block questions?: Browsing this page needs no account, and 2 of the 5 Block questions listed here open in full for free. The rest are part of a paid plan, and every row says which it is before you click it.

How these questions are sourced and verified