- Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Questions And Answers
- Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Questions
- Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Example
- Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Question And Answer
Interviewing and hiring database administrators is tough for managers. It’s hard to understand what a DBA does, let alone whether or not the DBA is good at it. This is especially difficult in shops with just one DBA, and that DBA is now gone – or when you’re hiring your first DBA.
- Data loss is a high-pressure situation for a database administrator, especially if a migration project falls behind schedule. You get to see their thought process, how they handle stress and the strategies they use for disaster recovery.
- Explain - a.) Storage Manager b.) Buffer Manager c.) Transaction Manager d.) File Manager a.) Storage Manager - A program module providing the interface between low-level data in database, application programs & queries submitted to the system is referred to as a storage manager. B.) Buffer Manager - A program module responsible to get data from disk storage into main memory and decide on the.
SQLPro Studio 1.0.91 (Mac OS X) Categories: Software » Mac A simple, powerful database manager for Mac OS X - SQLPro Studio is the premium database management tool for Postgres, MySQL, Microsoft Management Studio and Oracle databases. A simple, powerful database manager for macOS, iOS and Windows. Download Toggle Dropdown. No problem, SQLPro Studio supports most cloud based instances. Multiple result sets. Need to see the results for multiple tables at once? You can execute multiple queries and have the results for each displayed at the same time, including. Dear readers, these SQL Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of SQL.As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on further.
- Core DBA questions (23 minutes) – things I think most DBAs should know
- Infrastructure DBA questions (19m) – hardware, storage, virtualization, Windows
- Development DBA questions (20m) – performance tuning queries and indexes
- Screenshot questions (13m) – I show you a screenshot, and you tell me what you see
- Open-ended questions (10m) – story-telling questions where I want you to talk about your experience and this job
- Bad DBA Job Detector Test (19m) – how to gauge your own goals first, then how to read a job description and understand whether it makes sense for you
Developer, Sysadmin, and SQL Interview Questions
- Top 10 Questions to Ask a Senior SQL Server DBA – if you’re hiring a database administrator, here’s ten questions to ask along with the types of answers you should expect to hear.
- Top 10 Developer Interview Questions About SQL Server – the best questions to ask in an interview of a developer who will be storing data in SQL Server. Whether you’re hiring a C#, VB, or Java developer, they all need to know the basics.
- Windows System Administrator Interview Questions – how to find the right candidates to manage backups, network infrastructures, and desktop support.
Good Tips for Interviewing Database Administrators
- How to Hire Top Talent – First of all, you’re not the only one looking. But guess what? You’re probably looking for the wrong person, and you’re almost certainly asking the wrong questions.
- The Myth of the Perfectly Qualified Candidate – companies look for someone with exactly the right amount of experience – but what kind of employee has it? I explain.
- (SQL Server) Size Matters – how to determine if a DBA’s experience is right for your company.
- Tips for Hiring a DBA – my thoughts after going through the interview process at a few companies.
- Show Candidates Their Work Areas – and watch their reactions. It’ll help you gauge if they’re a good fit for you, plus give you insight about your environment.
Interview Tips for Candidates
- Top Ten Questions to Ask at Your Own Job Interview – avoid taking a crappy job that you’ll regret later!
- How to Get a Telecommuting Job – I’ve been telecommuting off and on since 2000, and I’ve accumulated a set of tips on how to get a remote DBA job.
- Being the Porsche of Job Candidates – you can get a decent job by being a decent candidate, but to get the best jobs, you have to be the best candidate. That means having an online presence.
- Ask for a List of Servers – DBA candidates need to ask as many questions as they answer during the interview.
Need to Practice for Your Next Interview?
We’ve got training! Brent recorded videos helping you prepare and practice for interviews with 100 practice DBA interview questions on on your desktop, laptop, iPad, or iPhone. Learn more.
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- SQL Useful Resources
- Selected Reading
Dear readers, these SQL Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of SQL. As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on further discussion and what you answer:
SQL or Structured Query Language is a language; language that communicates with a relational database thus providing ways of manipulating and creating databases. MySQL and Microsoft’s SQL Server both are relational database management systems that use SQL as their standard relational database language.
PL/SQL is a dialect of SQL that adds procedural features of programming languages in SQL. It was developed by Oracle Corporation in the early 90's to enhance the capabilities of SQL.
Following are various DDL or Data Definition Language commands in SQL −
- CREATE − it creates a new table, a view of a table, or other object in database.
- ALTER − it modifies an existing database object, such as a table.
- DROP − it deletes an entire table, a view of a table or other object in the database.
Following are various DML or Data Manipulation Language commands in SQL −
- SELECT − it retrieves certain records from one or more tables.
- INSERT − it creates a record.
- UPDATE − it modifies records.
- DELETE − it deletes records.
Following are various DCL or Data Control Language commands in SQL −
- GRANT − it gives a privilege to user.
- REVOKE − it takes back privileges granted from user.
Yes. A column alias could be used in the ORDER BY clause.
A NULL value is not same as zero or a blank space. A NULL value is a value which is ‘unavailable, unassigned, unknown or not applicable’. Whereas, zero is a number and blank space is a character.
Say True or False. Give explanation if False.If a column value taking part in an arithmetic expression is NULL, then the result obtained would be NULLM.
A query result displays all rows including the duplicate rows. To eliminate duplicate rows in the result, the DISTINCT keyword is used in the SELECT clause.
The BETWEEN operator displays rows based on a range of values. The IN condition operator checks for values contained in a specific set of values.
In such cases, the LIKE condition operator is used to select rows that match a character pattern. This is also called ‘wildcard’ search.
The default sorting order is ascending. It can be changed using the DESC keyword, after the column name in the ORDER BY clause.
SQL functions have the following uses −
- Performing calculations on data
- Modifying individual data items
- Manipulating the output
- Formatting dates and numbers
- Converting data types
The MOD function returns the remainder in a division operation.
The NVL function converts a NULL value to an actual value.
The NVL(exp1, exp2) function converts the source expression (or value) exp1 to the target expression (or value) exp2, if exp1 contains NULL. The return value has the same data type as that of exp1.
The NVL2(exp1, exp2, exp3) function checks the first expression exp1, if it is not null then, the second expression exp2 is returned. If the first expression exp1 is null, then the third expression exp3 is returned.
The NULLIF function compares two expressions. If they are equal, the function returns null. If they are not equal, the first expression is returned.
The COALESCE function has the expression COALESCE(exp1, exp2, …. expn)
It returns the first non-null expression given in the parameter list.
There are two ways to implement conditional processing or IF-THEN-ELSE logic in a SQL statement.
- Using CASE expression
- Using the DECODE function Itube studio 7 4 0 56.
The result would be the Cartesian product of two tables with 20 x 10 = 200 rows.
The cross join produces the cross product or Cartesian product of two tables. The natural join is based on all the columns having same name and data types in both the tables.
Group functions in SQL work on sets of rows and returns one result per group. Examples of group functions are AVG, COUNT, MAX, MIN, STDDEV, SUM, VARIANCE.
Say True or False. Give explanation if False.By default the group functions consider only distinct values in the set.
By default, group functions consider all values including the duplicate values.
Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Questions And Answers
Say True or False. Give explanation if False.The DISTINCT keyword allows a function consider only non-duplicate values.
Say True or False. Give explanation if False.All group functions ignore null values.
True.
Say True or False. Give explanation if False.COUNT(*) returns the number of columns in a table.
False. COUNT(*) returns the number of rows in a table.
It doesn’t have a GROUP BY clause. The subject_code should be in the GROUP BY clause.
The WHERE clause cannot be used to restrict groups. The HAVING clause should be used.
Say True or False. Give explanation if False.Group functions cannot be nested.
False. Group functions can be nested to a depth of two.
A subquery is a SELECT statement embedded in a clause of another SELECT statement. It is used when the inner query, or the subquery returns a value that is used by the outer query. It is very useful in selecting some rows in a table with a condition that depends on some data which is contained in the same table.
Say True or False. Give explanation if False.Viscosity 1 7 8 – graphical user interface for openvpn. A single row subquery returns only one row from the outer SELECT statement
False. A single row subquery returns only one row from the inner SELECT statement.
Say True or False. Give explanation if False.A multiple row subquery returns more than one row from the inner SELECT statement.
Say True or False. Give explanation if False.Multiple column subqueries return more than one column from the inner SELECT statement.
Everweb 2 2 download free. True.
Here a single row operator = is used with a multiple row subquery.
The DML statements are used to add new rows to a table, update or modify data in existing rows, or remove existing rows from a table.
Say True or False. Give explanation if False.While inserting new rows in a table you must list values in the default order of the columns.
True.
Null values can be inserted into a table by one of the following ways −
Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Questions
- Implicitly by omitting the column from the column list.
- Explicitly by specifying the NULL keyword in the VALUES clause.
Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Example
INSERT statement does not allow copying rows from one table to another.
False. INSERT statement allows to add rows to a table copying rows from an existing table.
The INSERT statement can be used to add rows to a table by copying from another table. In this case, a subquery is used in the place of the VALUES clause.
Yes. Use of subqueries in UPDATE statements allow you to update rows in a table based on values from another table.
Say True or False. Give explanation if False.The DELETE statement is used to delete a table from the database.
False. The DELETE statement is used for removing existing rows from a table.
Yes, subqueries can be used to remove rows from a table based on values from another table.
Say True or False. Give explanation if False.Sqlpro Studio 1 0 169 – Powerful Database Manager Interview Question And Answer
Attempting to delete a record with a value attached to an integrity constraint, returns an error.
Say True or False. Give explanation if False.You can use a subquery in an INSERT statement.
True.
The MERGE statement allows conditional update or insertion of data into a database table. It performs an UPDATE if the rows exists, or an INSERT if the row does not exist.
Say True or False. Give explanation if False.A DDL statement or a DCL statement is automatically committed.
VARCHAR2 represents variable length character data, whereas CHAR represents fixed length character data.
Say True or False. Give explanation if False.A DROP TABLE statement can be rolled back.
False. A DROP TABLE statement cannot be rolled back.
A view is a logical snapshot based on a table or another view. It is used for −
- Restricting access to data;
- Making complex queries simple;
- Ensuring data independency;
- Providing different views of same data.
A view doesn’t have data of its own.
What is Next ?
Further you can go through your past assignments you have done with the subject and make sure you are able to speak confidently on them. If you are fresher then interviewer does not expect you will answer very complex questions, rather you have to make your basics concepts very strong.
Second it really doesn't matter much if you could not answer few questions but it matters that whatever you answered, you must have answered with confidence. So just feel confident during your interview. We at tutorialspoint wish you best luck to have a good interviewer and all the very best for your future endeavor. Cheers :-)
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