Quiz on Array

What is Array?

• Collection of different type of elements

• Collectionof similar type of elements

• None of the above

• Both a n b

What is right way to Initialize array?

• int num[6] = { 2, 4, 12, 5, 45, 5 };

• int n{} = { 2, 4, 12, 5, 45, 5 };

• int n{6} = { 2, 4, 12 };

• int n(6) = { 2, 4, 12, 5, 45, 5 };

Size of the array need not be specified, when

• It is a declaratrion

• Initialization is a part of definition

• Only It is a formal parameter

• All the above

Predict the output of below code:

#include<stdio.h>

int main()

{

int a[5] = {5, 1, 15, 20, 25};

int i, j, m;

i = ++a[1];

j = a[1]++;

m = a[i++];

printf("%d, %d, %d", i, j, m);

return 0;

}

• 2,5,15

• 3, 2, 15

• 1,2,5

• 12,15,1

What is the value of a[4]?

int a[5]={1,2,4,1,0}

• 1

• 10

• 0

• Error

What is the output of C program with arrays?

int main()

{

int a[3] = {20,30,40};

int b[3];

b=a;

printf("%d", b[0]);

}

• Compiler Error

• Output : 20

• Output : 30

• Output : 0

applications of a multidimensional array

• Matrix-Multiplication

• Minimum Spanning Tree

• Finding connectivity between nodes

• All the above

#include <stdio.h>

int main()

{

int ary[2][3][4], j = 20;

ary[0][0] = &j;

printf("%d\n", *ary[0][0]);

}

• Junk Value

• No output

• Compile time Error

• Address of j

Predict the output of below code:

#include<stdio.h>

int main()

{

int arr[5], i=0;

while(i<5)

arr[i]=++i;

for(i=0; i<5; i++)

printf("%d, ", arr[i]);

return 0;

}

• 1,2,3,4

• Garbage value, 1, 2, 3, 4,

• 2,4

• none of these

Array base address in C language

• Base address is the address of 0th index element.

• An array b[] base address is &b[0]

• An array b[] base address can be printed with printf("%d", b);

• None of the above