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IBPS RRB 2026: Officer Scale I & Office Assistant complete guide

IBPS RRB XV guide for Officer Scale I and Office Assistant: tentative dates, separate Prelims timers, selection routes and a practical preparation plan.

IBPS RRB XV has different selection routes for Officer Scale I and Office Assistant. Choose the post first, then check its eligibility, language requirements and examination scheme. “RRB PO” and “RRB Clerk” are common search terms; the official notice uses the post names.

Source check: 20 September 2026. Use the RRBs-XV notification and tentative IBPS calendar. The dates below are calendar plans, subject to later notices and your call letter.

StageOfficer Scale IOffice Assistant
Prelims21–22 November 20266, 12 and 13 December 2026
Mains20 December 202630 January 2027

Use the separate Prelims clocks

Both routes have 80 questions in 45 minutes, but that time is divided: Reasoning gets 25 minutes and Numerical Ability or Quantitative Aptitude gets 20. Do not use an unrestricted 45-minute timer for a full simulation. Neither Prelims paper includes an English section.

Start a practice session by choosing its purpose. Untimed work helps repair a concept; a timed section tests decisions under the clock. Mixing the two makes the score hard to interpret. If you pause a mock to read a solution, keep the learning but do not count it as an exam simulation.

For each wrong answer, record the cause. A calculation error, a puzzle abandoned halfway and an unfamiliar method need different follow-up work. Revisit the method with new questions before taking another full paper.

The paths separate after Prelims

Office Assistant goes through Mains without an interview. Officer Scale I includes Mains and interview. Both need preparation beyond the two Prelims subjects. Read the Office Assistant stage guide or Scale I Mains and interview guide before choosing a weekly timetable.

If you are considering Scale II or III, use the separate single-exam guide. Those are not simply harder versions of the Scale I route; post and experience requirements also differ.

Check language and posting conditions properly

Read the language clause for the post and participating RRB you select. Check what evidence counts, whether a learning period applies and which conditions the bank will enforce. The optional English/Hindi examination component is not a substitute for the separate local-language requirement.

Do not assume a home-town posting or copy another bank’s language-test exemption. Match the application choices with the current notice and the bank’s conditions. Keep copies of the documents supporting each eligibility claim.

Build the next week around one weakness

Keep subject foundations active while adding the awareness and computer work required for Mains. For banking developments, write short notes explaining the institution, the change and why it matters. A source-linked explanation is more useful than a list of isolated headlines.

At the end of the week, compare like-for-like timed sections. Did fewer errors come from calculation? Did you leave a difficult set sooner? Use those observations to choose the next repair task. No fixed accuracy percentage or attempt count guarantees a cutoff.

Check the upcoming exam calendar for related recruitments and the results directory when you need the official authority’s portal. For shared subject preparation, the banking guides explain where formats overlap and where they differ.