Questions

Q:

How many gold medal have been won by India in the Olympics so far

A) 4 B) 6
C) 8 D) 10
 
Answer & Explanation Answer: C) 8

Explanation:
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Q:

Fat can be seperated from milk in a cream seperator because of :

A) Cohesive Force B) Gravitational Force
C) Centripetal Force D) Centrifugal Force
 
Answer & Explanation Answer: D) Centrifugal Force

Explanation:
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Filed Under: Physics

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Q:

TATA Projects has recently launched which initiative to promote green cover in India  ?

A) Green World B) Green India
C) Green Earth D) Green Thumb
 
Answer & Explanation Answer: D) Green Thumb

Explanation:

The TATA Projects has launched unique “Green Thumb” initiative in India to promote green cover and to protect the environment on 2017 World Environment Day (WED). The Green Thumb 2017 is in continuation to 2016 TATA Projects’ programme wherein it aimed to get 10,000 people to click (pledge) to plant a sapling on their behalf – the response received was a tremendous 23,000. Encouraged by the response, TATA Projects planted a total of over 42,000 saplings across the country in over 100 locations in the last one year (2016-17). This year, under Green Thumb initiative, the company will plants trees, citizens who wish to do their bit to save the environment, can express their support for the cause. They can do so by clicking on the banner to plant a sapling on the Green Thumb.

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Exam Prep: Bank Exams , CAT
Job Role: Bank PO

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Q:

what is the gram formula mass of NH43PO4?

A) 139.54 B) 140.70
C) 149.08 D) 153.24
 
Answer & Explanation Answer: C) 149.08

Explanation:

The gram formula mass is nothing but molar mass.

 

Composition :

 

Symbol      Element       Atomic weight       Atoms
   

     P         Phosphorus       30.973762               1       = 30.973
   

     O         Oxygen             15.9994                  4       =  63.998
   

     N         Nitrogen            14.0067                  3       =  42.020
   

     H         Hydrogen          1.00794                  12      =  12.096

   

Total   =  30.973+63.998+42.020+12.096 = 149.087

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Filed Under: Chemistry
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Q:

OSI Reference Model provides a framework for discussing network operations and design

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

Explanation:

It provides a framework for discussing network operations and design

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Subject: Networking
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Q:

State funding of elections takes place in

A) France and Italy B) USA and Canada
C) Germany and Austria D) Britain and Switzerland
 
Answer & Explanation Answer: C) Germany and Austria

Explanation:
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Q:

Magnetic Tape can serve as

A) Input device B) Secondary storage device
C) Output device D) None of the above
 
Answer & Explanation Answer: B) Secondary storage device

Explanation:

Related image

Magnetic tape can serve as a Secondary storage unit. It is a medium for magnetic recording, made of a thin, magnetizable coating on a long, narrow strip of plastic film.

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Filed Under: Computer
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Q:

What are the different Adder circuits you studied?

Answer

Adders are generally of five types:


1.Ripple Carry Adder:


The Ripple carry adder(RCA) consists of a building block named Half Adder(HA) which is cascaded to form a Full Adder(FA). These buildingblocks HAs and FAs are also the building blocks of all types of adders.The n full adders are cascaded to form n bit RCA.


The full adder has three input pins(input Ai,input Bi,carryin Ci) and two output pins(Sum and Ci+1).Its equations are:


Sum=Ai^Bi^Ci


Ci+1=Ai.Bi+Bi.Ci+Ai.Ci


 


2. Carry Lookahead Adder:


The Carry Lookahead Adder(CLA) reduces the delay as that in RCA. Let Gi=Ai.Bi, and Pi=Ai^Bi, then Ci+1=Gi+Pi.Ci.


The expressions for Sum and Ci+1 is then defined completely in terms of input pins rather wait for input carry to appear.


 


3. Carry Select Adder:


The carry select adder uses duplicate modules for each combination of input carry(i.e. 1 and 0).The multiplexers then select the appropriate sum and carry output according to the carry output of the preceding stages.


 


4. Carry Skip Adder:


The carry skip adder are as fast as carry lookahead adders which are the fastest adders but its spped decreases to about 20-30% if input operands are 64-bit or more. In these adders we divide the input bit stream into various blocks and make use of two observations:


-if each element of the two bit streams are unequal,i.e. Ai!=Bi than the carry input of the block is equal to the carry input.


-if each element of the two bit streams are equal,i.e. Ai=Bi than the carry input of the block is opposite of the carry input.


 


5. Carry Save Adder:


The carry save adder reduces the addition of three elements into addition of two elements,i.e. if you want sum of nine numbers it reduces it into sum of six numbers. In first step the sum of three numbers is calculated without bothering for the carry.During the second step only carry is calculated which is then added to the generated sum to give the required sum. 

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Subject: Hardware

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