Elasticsearch 8.15 practice questions: 10 free samples from the Elasticsearch mock exam

10 questions in the style of the Elastic Certified Engineer exam, with their answer options. They are 10 of the 48 in the pool the mock draws from; answers and explanations come back when you sit it, and every question is marked against its domain so you can see where you stand.

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  1. 1. What is a document in Elasticsearch? Documents and indices

    1. AA JSON object stored under an id inside an index
    2. BA query saved for reuse
    3. CA row in a table with a fixed set of columns
    4. DA file on disk that the cluster serves verbatim

  2. 2. Elasticsearch can join two indices at query time the way SQL joins two tables. Documents and indices

    1. 3. A document is visible to search the instant the index request returns success. Documents and indices

      1. 4. A field arrives first as the string "2026-08-29". What is the risk of letting dynamic mapping decide? Mappings and field types

        1. AThe document will be rejected until a mapping exists
        2. BNothing — dynamic mapping revises the type when it sees a new shape
        3. CIt will always be mapped as text, so date ranges will not work
        4. DIt may be mapped as a date, and a later non-date value in that field will be rejected

      2. 5. You can change an existing field from text to keyword on a live index. Mappings and field types

        1. 6. When does an index template take effect? Mappings and field types

          1. AWhen an index matching its pattern is created
          2. BImmediately, on every index that matches, including existing ones
          3. CWhen the first document is written to a matching index
          4. DOn the next cluster restart

        2. 7. How many tokenizers does an analyzer have? Analysis

          1. AExactly one
          2. BOne per field
          3. CAs many as you configure
          4. DNone — tokenizing is optional

        3. 8. A search for "e-mail" returns nothing though the word is in the documents. What do you check first? Analysis

          1. AWhat tokens the analyzer produces for both the text and the query
          2. BWhether the index has enough replicas
          3. CWhether the document was refreshed
          4. DWhether the cluster health is green

        4. 9. Searching a keyword field for "bali" will match a document containing "Bali". Analysis

          1. 10. A term query for "Bali Kids" against a text field returns nothing. Why? Query DSL

            1. Aterm queries only work on numbers and dates
            2. BThe field needs fielddata enabled
            3. CThe stored tokens are "bali" and "kids"; the unanalyzed query looks for the whole string as one term
            4. Dterm queries require an exact id, not a value

          Check your answers

          The mock marks every answer on submit, explains it and breaks the result down by domain. It draws its questions in the published domain weights, and passes at 70% — Elastic publishes no pass mark and the real exam is hands-on. 70% is a convention of this site, not an official figure.

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          Exam facts are taken from the official page: www.elastic.co. Questions here are written for practice and are not from the real exam.