Database developer sollicitatievragen

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Charles Schwab
Er werd een Junior Database Developer gevraagd...12 maart 2015

Do you need sponsorship for this position?

4 antwoorden

No

No

no

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CMSS Private Limited

1.find second max salary hint using count

4 antwoorden

SELECT max(salary) FROM emptable WHERE salary < (SELECT max(salary) FROM emptable); Minder

SELECT max(salary) FROM emptable WHERE salary < (SELECT max(salary) FROM emptable); Minder

select max(Emp_Sal) from Employee a where 1 = ( select count(*) from Employee b where b.Emp_Sal > a.Emp_Sal) Minder

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Comscore

How do java deal with hash collision?

2 antwoorden

link them

There's quite an extended back and forth in actual interviews for questions like this, so there's no real replacement for actual practice. The Prepfully Comscore Database Developer experts have actually worked in this role, so they're able to do a propermock, which really puts you through the paces and lets you assess your readiness level. prepfully.com/practice-interviews Minder

MetricStream

Remove duplicates from table

2 antwoorden

Using Rowid or Having clause

hdfs dfs -rm /table/duplicates

Texas Association of Community Health Centers

How much SQL do you know.

2 antwoorden

I answered that I used SQL for adding database data for programming a site.

Tons, over 25 years.

KLAS Research

Do you understand database normalization?

2 antwoorden

Honestly

No

Bryant Christie

They gave me a sheet of queries to write and tasks to complete in a sample database that they had built including a few "if you have time" questions, and left me to do that on my own for about a half hour before reviewing what I had done.

2 antwoorden

I got through all of the basic questions with close attention to detail, but did not get to the extra questions. Minder

Nice that you posted great info on the position and interview, but wondering what the starting salary was? Minder

Chegus Infotech

Tell about OOPS concepts in java

2 antwoorden

They are Abstraction, Encapsulation, Inheritance, and Polymorphism. is key to understanding how Java works. Minder

Explained all the OOPS concepts with example 1) Abstraction 2) Encapsulation 3) Inheritance 4) Polymorphism Minder

AIR Worldwide

Table with a single field with integer value. Write a query to display the field in both ascending and descending order.

2 antwoorden

Customerid is one of the integer values

Select * from customers Order by customerid; Similarly, Select*from customers Order by customerid desc; Minder

Zeta Global

How would you deal with a developer who writes bad code?

2 antwoorden

I personally would offer advice and point at similar solutions. I would not be confrontational and sort it out at release time if it was really bad. Perhaps I might want to inform my manager but this is down to level of competence. Nobody is ever wrong in my book, it all boils down to experience. Minder

Tell them "You see all those tasks we have outsourced to India? Do you want yours to be as well? Write better code" Writing readable code is essential, writing efficient code even more so. If a developer cannot do that properly, they need a good scare. Minder

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