Test Your Programming Skills with Safcode!

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Here is all important interview / exams questions.
Student doing practice apptitude test on safcode platform.
Instruction: "Total Number of Questions: 20
Each question carry 10 mark , no negative marking"

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Quiz Start

1. How much storage space does DATETIME require? 4 bytes
8 bytes
1 byte
2 bytes

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2. A_________ attribute may itself contain two or more attributes, which represent basic attribute having independent meanings of their own. Dependent
Derived
multi-valued
Composite

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3. Microsoft SQL Server data base engine provides a relational__________ named as Azure SQL Database. All of them
Database-As-A Service (DBaaS)
Platform as a Service (PaaS)
Infrastructure as a service (IAAS)

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4. What is a candidate key? Used to identify a column
Alias for foreign key
Used to uniquely identify a Tuple
None of Them

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5. A view is a __________ Table. Real
Dynamic
Static
Virtual

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6. What SQL clause is used to restrict the rows returned by a query? And
From
Having
Where

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7. Hot data means: Data which is not processed
Data not in use
Data being processed
Data in Database

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8. Which MySQL statement is used to delete data from a database? EDIT
REMOVE
COLLAPSE
DELETE

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9. A systematic collection of data stored in a central location is known as? None of Them
Excel
CSV
Database

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10. Which of the following function returns the number of unique values in a column? COUNT(DISTINCT)
COUNT(expression)
COUNT(*)
sUM()

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