This Database Administration and SQL Online Test Separates Good From Bad Hires

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About the test

The Database Administration and SQL online test assesses a candidate's knowledge of managing and administering database management systems to store and organize data, along with the knowledge of SQL.

It's an ideal test for pre-employment screening. A good database administrator needs to have knowledge of capacity planning, installation, configuration, database design, migration, performance monitoring, security, troubleshooting, as well as backup and data recovery along with the ability to write SQL queries for the purpose of database administering.

This online test requires candidates to answer multiple-choice and fill the blanks questions about various procedures required for database administration, and to write SQL queries that extract, combine, and manipulate data.

Sample public questions

Under a new database backup plan:

  • Full backups of the database are taken every 6 hours starting at 00:00.
  • Differential backups are taken every 1 hour starting at 01:00, except for intervals of 6 hours (when full backups are taken).
  • Transaction/redo log backups are taken every 30 minutes starting at 00:00. The transactional/redo log is reset/cleared after a backup is taken.

Due to a missed scenario during the testing phase, a development error in setting wrong query conditions resulted in the loss of all records from a table at 13:45, which had data prior to the implementation of the backup plan. All further backups were taken as per the mentioned schedule.

A diagram showing the backup schedules

Select all the ways to restore the database until 13:45.

Database Administration
5 min

Given the following data definition, write a query that returns the number of students whose first name is John.

TABLE students
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL
3 min

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43 more premium Database Administration and SQL questions

  Roads,   Authors,   Autocomplete,   Ban Users,   Bank Branches,   Cheapest Product,   Countries,   Developers,   Hospital Patients,   Index Performance,   Menu Items,   Movies,   Projects,   Rectangles,   Restaurant Menu,   Retirees,   SMS Messages,   Poll,   Users and Accounts,   Matching Clothes,   Agents,   Sales,   Employee Manager,   Auto Show,   Delete Orders,   Welfare Organization,   Tasks,   Manager Sales,   Student Rankings,   Student Activities,   Youngest Child,   Movies Live,   Department Report,   Ingredients,   Average Salary,   Movie Genres,   River Discharge,   ATM Locations,   Database Storage Space,   Index Fragmentation,   Master Slave,   Transactions,   Merge Stock Index.

Skills and topics tested

  • SQL
  • Conditions
  • Views
  • Select
  • Create Index
  • Database Schema
  • Performance Tuning
  • Alter Table
  • Constraints
  • Create Table
  • Aggregation
  • Subqueries
  • Ordering
  • Bug Fixing
  • Indexes
  • Group by
  • Update
  • Insert
  • Joins
  • Left Join
  • Right Join
  • Delete
  • Union
  • CTE
  • Database Normalization
  • Database Administration
  • Database Logs
  • Server Clustering

For job roles

  • Database Administrator
  • SQL Developer

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