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

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2. Character? limit to create database name in mysql? 44
40
64
54

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3. ______________ Command is used to remove rights or privileges from user accounts DELETE
REVOKE
REMOVE
CANCEL

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

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

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6. ________________ is the capability of a system, network, or process to manage a growing amount of work, or its ability to enlarge so as to adapt to that growth CPU Utilization
Performance
Performance optimization
Scalability

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

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

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9. which of the following commands is used view the default installed database? DISPLAY DATABASE
VIEW DATABASE
SELECT DATABASE
SHOW DATABASE

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10. Which is the default order of sort in ORDER BY clause? Not in Order by Default
Both Ascending and Descending
Ascending
Descending

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