Database Administration Questions


Q:

The word length of a computer is measured in

A) centimeters B) millimeters
C) bytes D) bits
 
Answer & Explanation Answer: D) bits

Explanation:
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Q:

What is the maximum number of characters when applying MsgBox and InputBox ?

Answer

The maximum number of characters allowed is 1024 characters.

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Q:

3/8 as a decimal

A) 1.375 B) 2.375
C) 0.375 D) 3.75
 
Answer & Explanation Answer: C) 0.375

Explanation:

Expressing 3/8 as a decimal fraction:

We can convert 3/8 into a decimal fraction by just dividing 3 by 8 or making 3 into 8 parts.

Then, it is 3/8 = 0.375 as a decimal fraction.

 

Other Method::

3/8 as a Decimal :

In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple.

Now to make 8 into 1000, we multiply numerator and denominator with 125

 

=> (3 x 125)/(8 x 125) = 375/1000 = 0.375.

 

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Q:

What occurs once in a minute twice in a moment?

Answer

Here the letter 'M' appears once in Minute and twice in a MoMent.

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Q:

A practice to learn something

a_practice_to_learn_something1551439875.jpg image

A) Poem B) Summary
C) Lesson D) Introduction
 
Answer & Explanation Answer: C) Lesson

Explanation:

A practice to learn something is a Lesson.

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Q:

CM is about managing the different items in the product, and changes in them.

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

Explanation:

Configuration Management is a support for software in managing the different items in the product, and changes in them.

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Q:

What is Primary Key in DBMS?

Answer

A primary key is a special relational database table column or combination of columns designated to uniquely identify all table records. That is, A primary key is a column or set of columns in a table that uniquely identifies tuples (rows) in that table.


A primary key, also called a Primary Keyword.



Main Features Primary key are ::


It must contain a unique value for each row of data.


It cannot contain null values.

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Q:

What does a VLAN do?

A) Breaks up broadcast domains in a layer 2 switch internetwork B) Provides multiple broadcast domains within a single collision domain
C) Provides multiple collision domains on one switch port D) Acts as the fastest port to all servers
 
Answer & Explanation Answer: A) Breaks up broadcast domains in a layer 2 switch internetwork

Explanation:

virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). LAN is the abbreviation for local area network and in this context, virtual refers to a physical object recreated and altered by additional logic.

VLANs work by applying tags to network packets and handling these tags in networking systems – creating the appearance and functionality of network traffic that is physically on a single network but acts as if it is split between separate networks. In this way, VLANs can keep network applications separate despite being connected to the same physical network, and without requiring multiple sets of cabling and networking devices to be deployed.

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