Database Administration Questions


Q:

Statement: A large number of students who have passed their XII Std. terminal examination in the country could not get admission to colleges as the number of seats available are grossly inadequate.
Courses of action:
a. The evaluation system of XII Std. terminal examination should be made more tough so that fewer students pass the examination.
b. The Government should encourage the private sector to open new colleges by providing them land at cheaper rate.
c. The rich people should be asked to send their wards to foreign countries for higher studies enabling the needy students to get admission in colleges within the country.

A) only a and b follows B) Only c follows
C) Only b follows D) All a, b & c follows
 
Answer & Explanation Answer: C) Only b follows

Explanation:

Clearly, reducing the number of aspirants for admission to colleges or sending the students of well-to-do families to foreign countries for higher studies, is no proper solution. So, both I and III do not follow. The right solution is to increase the number of colleges so as t accommodate the increasing number of admission-seekers. So, only II follows.

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Q:

3 x 3 + 3 - 3 + 3 = ?

A) 9 B) 12
C) -3 D) 3
 
Answer & Explanation Answer: B) 12

Explanation:

Using BODMAS law,

3 x 3 + 3 - 3 + 3 =

3 x 3 = 12

= 12 + 3 - 3 + 3

=  9 + 3

= 12

 

Hence, 3 x 3 + 3 - 3 + 3 = 12.

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Q:

I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound.

 What am I?

Answer

A Windmill.

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Q:

Which command displays memory usage in linux?

A) Top B) Free
C) Buffer D) Swap
 
Answer & Explanation Answer: B) Free

Explanation:

Free command displays memory usage in linux.

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Q:

What is String Args in Java?

Answer

String Args (String []) is an array of parameters of type String.


In Java, 'args' contains the supplied command-line arguments as an array of String objects. In other words, if you run your program as 'java MyProgram Hello World' then 'args' will contain ["Hello", "World"]. When a java class is executed from the console, the main method is what is called.

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Q:

A source program is

A) a program to be translated into machine language B) a program written in a machine language
C) a machine language translation of a program D) All of the above
 
Answer & Explanation Answer: A) a program to be translated into machine language

Explanation:

A_source_program_is1563521242.png image

A source program is is a text file that contains instructions or a program written in a language other than machine code, typically a high-level language.

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Q:

Which file format can be added to a powerpoint show?

A) .Gif B) .Wav
C) .Jpg D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:
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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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