Questions

Q:

The 90oEast Ridge lies in the _______Ocean

A) Pacific B) Atlantic
C) Indian D) Arctic
 
Answer & Explanation Answer: C) Indian

Explanation:

The 90oEast Ridge is aseismic, composed of volcanic rock it is about 1700 km long treading in a NNE direction into Bay of Bengal from the Indian Ocean.

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Filed Under: World Geography
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Q:

The element common to all Acids is

A) Nitrogen B) Oxygen
C) Hydrogen D) Carbon
 
Answer & Explanation Answer: C) Hydrogen

Explanation:

Hydrogen is the common element to all Acids. But every element which contains Hydrogen is not an Acid. Most of the acids also contain Oxygen.

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4 3309
Q:

Systems running more than one process concurrently are called ______________

A) Multiprocessing B) Multiprogramming
C) Real time D) Batch processing
 
Answer & Explanation Answer: B) Multiprogramming

Explanation:
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Filed Under: Computer
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Q:

How would you dynamically allocate a 2-D array of integers?

Answer

#include "alloc.h"


#define MAXROW 3


#define MAXcol 4


main()


{


        int *p, i, J;


        p = (int *) malloc (MAXROW * MAXCOL * sizeof (int));


         for ( i=0; i < MaxROW ; i++)


         {


                for (j=0; j < MAXCOL ; j++)


                { 


                      p [ i * MAXCOL + j] = i;


                       printf ( "%d", p [i * MAXCOL + j] );


                 }


                  printf ("\n");


          }


}

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Subject: Programming

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Q:

Whose trademark is the operating system unix?

A) Ashton Tate B) Microsoft
C) INTEL D) BELL Laboratories
 
Answer & Explanation Answer: D) BELL Laboratories

Explanation:

BELL Laboratories trademark is the operating system unix.

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4 3307
Q:

Which of the following TV shows done by Green Gold Animations, Hyderabad ?

A) Chotta Bheem B) Little Krishna
C) Chacha Chowdary D) None
 
Answer & Explanation Answer: A) Chotta Bheem

Explanation:
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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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Q:

Which of the following Rivers has no Bridges built over it?

A) Nile B) Congo river
C) Amazon river D) Yellow river
 
Answer & Explanation Answer: C) Amazon river

Explanation:

There are No bridges over The Amazon River.

The Amazon River, in South America, is the largest river by discharge volume of water in the world and the second longest in length after The Nile in Egypt.

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