IT Trainer Questions


Q:

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, what will be the sum of the highest number and the lowest number?

A) 120 B) 160
C) 80 D) 60
 
Answer & Explanation Answer: A) 120

Explanation:

Let the three numbers be x, y, z.

From the gien data,

x = 2y ....(1)

x = z/2 => z = 2(2y) = 4y .....(From 1)  ...........(2)

Given average of three numbers = 56

Then,

 

x + y + z3 = 562y + y + 4y3 = 56  (From 1 & 2)7y = 56 x 3y = 24

Now,

x = 2y => x = 2 x 24 = 48

z = 4y = 4 x 24 = 96

 

Now, the highest number is z = 96 & smallest number is y = 24

 

Hence, required sum of highest number and smallest number

= z + y

= 96 + 24

= 120.

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15 7140
Q:

The brain of any computer system is

A) CPU B) Memory
C) Control D) ALU
 
Answer & Explanation Answer: A) CPU

Explanation:

Central Processing Unit (CPU) is the brain of any computer system.

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19 7019
Q:

Order of basicity of amines in gaseous state?

A) 2'> 1'> 3' > NH3 B) 3' > 2' > 1'> NH3
C) 1' > 2' > 3'> NH3 D) 2'> 3'> 1' > NH3
 
Answer & Explanation Answer: B) 3' > 2' > 1'> NH3

Explanation:

The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding.

 

So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic.

 

But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.

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Filed Under: Chemistry
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6 6982
Q:

Microwave communication uses high-frequency.

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

Explanation:

Microwaves are high-frequency signals in the 300 MHz to 300 GHz range. This is in contrast to radio signals, which are typically broadcast in all directions. Radio signals operate in the 3 Hz to 300 MHz range.


Microwave signals are used for both satellite and ground-based communications.

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Subject: Physics
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5 6975
Q:

A DBMS query language is designed to

A) Specify the structure of a database B) Support in the development of complex applications software
C) Support end users who use English-like commands D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:
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2 6952
Q:

What is always coming but never arrives?

Answer

It is Tomorrow. It always be tomorrow which represents coming but never arrives.

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7 6928
Q:

Onion Eating Festival is celebrated in which country ?

A) Sweden B) Thailand
C) New Delhi D) Spain
 
Answer & Explanation Answer: D) Spain

Explanation:

Sweden - Potato Festival

Thailand - Vegetarian Festival

New Delhi - International Mango Festival

Spain - Onion Eating Festival

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21 6884
Q:

Which of the following is Not an Operating System?

A) UNIX B) Windows NT
C) C++ D) DOS
 
Answer & Explanation Answer: C) C++

Explanation:

C++ is not an Operating System.

 

An Operating System is a collection of system programs that manages all the other programs application programs in a computer as well as the allocation and use of hardware resources such as the CPU, Memory and the Hard Disk Drive.

It acts as an interface between the hardware and the user level program.

It controls and facilitates the overall operation of a computer. 

 

Here

UNIX : UNIX is a popular multi-user, multitasking operating system (OS) developed at Bell Labs.

 

Windows NT : Windows NT is a family of operating systems produced by Microsoft, the first version of which was released in July 1993.

 

DOS : DOS is Disk Operating System. The term DOS can refer to any operating system.

 

C++ : C++ is a programming language and computing platform.

 

Hence, C++ is not an Operating System.

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