Questions

Q:

Nucleus of Hydrogen atom consists of

A) 2 protons only B) 2 neutrons only
C) 1 proton only D) 1 electron only
 
Answer & Explanation Answer: C) 1 proton only

Explanation:

The nucleus of hydrogen consists of only a single proton.

Its parts are a single negatively-charged electron that circles a single positively-charged nucleus of the hydrogen atom.

The electron is bound to the nucleus by the Coulomb force.

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Filed Under: Chemistry
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4 4011
Q:

What always works with something in its eye?

Answer

A Needle works when it has thread in its eye that is in its tiny hole.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL
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6 4010
Q:

Write a c program to find out sum of diagonal element of a matrix.

Answer

#include<stdio.h>

int main(){

  int a[10][10],i,j,sum=0,m,n;

  printf("\nEnter the row and column of matrix: ");
  scanf("%d %d",&m,&n);

  printf("\nEnter the elements of matrix: ");
  for(i=0;i<m;i++)
      for(j=0;j<n;j++)
           scanf("%d",&a[i][j]);
  printf("\nThe matrix is\n");

  for(i=0;i<m;i++){
      printf("\n");
      for(j=0;j<m;j++){
      printf("%d\t",a[i][j]);
      }
 }
 for(i=0;i<m;i++){
     for(j=0;j<n;j++){
          if(i==j)
              sum=sum+a[i][j];
     }
 }
 printf("\n\nSum of the diagonal elements of a matrix is: %d",sum);

 return 0;
}

Sample output:

Enter the row and column of matrix: 3 3
Enter the elements of matrix:
2
3
5
6
7
9
2
6
7
The matrix is
2       3       5
6       7       9
2       6       7
Sum of the diagonal elements of a matrix is: 16

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Subject: Programming

1 4009
Q:

What is the capital of Hungary?

A) Budapest B) Reykjavik
C) Santo Domingo D) None
 
Answer & Explanation Answer: A) Budapest

Explanation:

Budapest is the capital of Hungary

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13 4008
Q:

An Oracle System Change Number (SCN):

A) is a value that is incremented whenever a dirty read occurs. B) is incremented whenever a deadlock occurs.
C) is a value that keeps track of explicit locks. D) is a value that is incremented whenever database changes are made.
 
Answer & Explanation Answer: D) is a value that is incremented whenever database changes are made.

Explanation:
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Filed Under: Database

0 4008
Q:

What is the name for the process that is used to convert a series of instructions or programs, written in a high-level language into instructions(or a program) that can be run on a computer? 

A) Assembling B) Compiling
C) Translating D) Uploading
 
Answer & Explanation Answer: B) Compiling

Explanation:
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Q:

A bond formed by the transfer of electrons between atoms of the elements is called

A) Ionic bond B) Covalent bond
C) Co-ordinate bond D) Hydrogen bond
 
Answer & Explanation Answer: A) Ionic bond

Explanation:
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Filed Under: Chemistry

5 4006
Q:

Is Air a Mixture?

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

Explanation:

True, Air is a Mixture.


Air is considered as mixture for the following reasons ;


1. Air can be separated into its components like N2, O2 , Argon and CO2 by the process of fractional distillation of liquid air.


2. Air shows the properties of all the gases present in the atmosphere.
For example : Oxygen is good Supporter of combustion. Hence air also is good supporter of combustion.


3. Air does not have a fixed formula.


4. Air has a variable composition because air at different places contains different amount of gases.


5. Heat or Light energy is neither absorbed nor released when air is prepared physical by mixing required amount of gases .


6. Mixture does have fixed boiling Point. It holds good in case of liquid air.

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Subject: Physics
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7 4005