Basis Interview Questions

1. Memory Management in SAP 

Ask the candidate to describe how SAP handles memory management. They may refer to transactions such as ST02 and ST03, and explain concepts like table buffers, work processes, roll-in/roll-out mechanisms, and heap (private) memory. While a deep dive into these areas is possible, it's important to note—as a Unix or DBA administrator would—that specifics are typically referenced as needed.

2. Buffer Statistics and Adjustments 

Ask the candidate to explain where they would look to analyze buffer statistics and how they would go about adjusting them. Expected references include transactions ST02 (for buffer analysis) and RZ10 (for profile parameter adjustments).

3. Printer Setup and Troubleshooting in SAP 

Ask the candidate to describe the process of setting up a printer in SAP and where they would investigate issues related to users being unable to print. Relevant transactions may include:
  • SPAD – for printer configuration
  • SP01 – to check spool requests
  • SM50 – to monitor work processes
  • SU01 – to verify user authorizations
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SAP Basis Interview Guide: 3 Core Areas

1. Database (DB) – Oracle Focus

Keep this section minimal, as SAP Basis admins typically rely on SAP tools for daily DB monitoring.

Topics to cover:

  • Oracle directory structure and key file locations:
    • init.ora, alert logs, redo logs, archive logs
  • High-level response when archive directory fills up
  • Emphasize that Oracle is treated as a "bit bucket"—SAP handles most monitoring and maintenance

Suggested questions:

  • Where are Oracle alert logs and configuration files typically located?
  • What would you do if the archive log directory fills up?
  • How does SAP interact with Oracle for daily operations?

2. Operating System (OS) – Unix/Linux Basics

Focus on essential OS knowledge needed for SAP Basis tasks.

Topics to cover:

  • Directory structure and NFS mounts (what/why/where)
  • OS error logs and message file locations
  • Basic Unix commands:
    • mv, cp, ls, grep, ps -ef, df -k
  • Client/server architecture understanding

Suggested questions:

  • What is NFS and why is it used in SAP environments?
  • Where would you find OS-level error logs?
  • Which Unix commands do you use most often in SAP Basis support?

3. SAP Application – Core Administration

This is the most critical area. Focus on directory structure, configuration files, transaction codes, and troubleshooting.

Topics to cover:

  • SAP directory structure and profile files:
    • START (startup only), INSTANCE, DEFAULT
    • Order of precedence: INSTANCE → DEFAULT → internal standard (RZ10)
  • Key functional areas:
    • Transports, user/print/spool/batch management
    • Monitoring, client tools/copies, support packages, kernel patches
    • Workload analysis, roles and security

Essential T-Codes:

SM50, SM51, SM66, SM12, SM13, SM21, DB01, DB02, DB13,
ST01, ST02, ST03, ST04, ST05, ST06, SU01, SUIM, PFCG,
SCC4, SE01, SE09, SE10, SPAM, SM35, SM36, SM37,
SPAD, SP01, SCC3, SCCL, SCC9

Troubleshooting Scenarios:

  • User cannot connect to SAP
  • Check SAP logon settings
  • Ping the host
  • Verify message server and dispatcher status
  • User cannot print
  • Check user setup in SU01
  • Review printer config in SPAD
  • Inspect spool requests in SP01
  • Check OS-level print queues
  • System performance is slow
  • Use SM66, SM51, SM50 for process overview
  • Check logs in SM21
  • Analyze system load in ST06, ST03
  • Review load balancing via SMLG and user sessions in AL08

Interview Philosophy

When evaluating candidates, prioritize:
  • Critical thinking over memorized answers
  • Curiosity and continuous learning mindset
  • Analytical persistence—willingness to dig deep and escalate when needed
Avoid installation-specific questions. Focus on general principles and cross-system understanding.

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