Database Administration Questions


Q:

How many times can you subtract 5 from 25?

Answer

Technically or logically it is possible only once. As if you subtract 5 from 25 at first te result will be 20. Now, you can't subtract 5 from 25 since the left number is 20.


 


But if you go mathematically, it can be done infinite times and only 5 times without going into the negatives.

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Q:

A man and his son are in a terrible accident and are rushed to the hospital in critical care. The doctor looks at the boy and exclaims "I can't operate on this boy, he's my son!" How could this be?

Answer

This is only possible when that doctor is boy's mother.

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Q:

What is immutable object? Can you write immutable object ?

Answer

Immutable classes are Java classes whose objects can not be modified once created. Any modification in Immutable object result in new object. For example is String is immutable in Java. Mostly Immutable are also final in Java, in order to prevent sub class from overriding methods in Java which can compromise Immutability. You can achieve same functionality by making member as non final but private and not modifying them except in constructor.

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Q:

The time complexity of sequential search is

A) O(n) B) O(2n)
C) O(n^2) D) None
 
Answer & Explanation Answer: A) O(n)

Explanation:

The time complexity of sequential search is O(n)

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Filed Under: Database
Job Role: Database Administration

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Q:

Representation level data models provide the concepts that are close to the way many users perceive data

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

High level data models provide the concepts that are close to the way many users perceive data

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Subject: Database
Job Role: Database Administration

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Q:

Which of the following is not a relational database?

A) 4th Dimension B) Reflex
C) dBASE IV D) FoxPro
 
Answer & Explanation Answer: B) Reflex

Explanation:
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Filed Under: SQL
Job Role: Database Administration , IT Trainer

1 3240
Q:

What is more useful when it is broken?

Answer

An Egg is more useful when it is broken than it is not.

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Q:

Choose the sentence that contains a relative pronoun?

A) That is my books bag B) Some boys are coming for tution
C) The girl, whom you have met yesterday is my sister D) Those are not your things
 
Answer & Explanation Answer: C) The girl, whom you have met yesterday is my sister

Explanation:

Here in the given options, The girl, whom you have met yesterday is my sister is the sentence which has relative pronoun.

 

The pronoun which is used to connect a clause or phrase to a noun or pronoun is called as relative pronoun.

 

The most common relative pronouns are who, whom, whose, which, and that. Sometimes when and where can also be used as relative pronouns.

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