ANS:C - Prudent

No answer description is available. 

ANS:D - strrchr()

strrchr() returns a pointer to the last occurrence of character in a string. Example:

#include <stdio.h>
#include <string.h>

int main()
{
    char str[30] = "12345678910111213";
    printf("The last position of '2' is %d.\n",
            strrchr(str, '2') - str);
    return 0;
}

ANS:B - –14 and –13, –27

When we complement 11110010 for 1's complement, we get 00001101. Then add 1 in 1's complement to get 2's complement.

00001101+1 =00001110.

The decimal of 00001110 is 14. And the sign of the number is "-" because in 11110010, the starting number is "1". So, the number is -14.

Similarly the 2's complement of 2nd number is 00001101, and we get 13 as decimal value. The sign of the number is again negative as we can see "1" as MSB, so the number in decimal is -13.

When we add the 2's complement of both numbers, we get 27 as total decimal value and the sign is negative, because both the numbers were negative.

ANS:A - 2's-complement system.

No answer description is available.

ANS:C - Full adders have a carry input capability.

Yes, half adders have only two inputs A and B. When we add two 4 bit binary number like 0001 and 0011, then half adder can not be used because if the first bit of both the numbers is 1, then the sum would be 0 and carry would be 1. But this carry can not be added with the second bits addition of the number. So, half adders are useless. But in full adders, one more carry input is present, so that, if carry of one stage is present, it can be added with the next stage as it is done in normal addition. So, therefore, full adders have a carry input capability.

ANS:C - 14₁₀

Decimal value for A = 10.

B = 11.
C = 12.
D = 13.
E = 14.

So option C is correct.

ANS:B - reduce propagation delay

No answer description is available. 

ANS:A - 10120₁₆

Base should be 2 in question as well in answer.
As, if it is 16 base system...no should be given in hex form.
Ans is correct but in terms of base 2 not 16.

ANS:A - difference = 0
borrow = 0

No answer description is available. 

ANS:B - 0000  1110

The given answer is right because convert 18 and 4 in 8 bit that means 18 = 0001 0010.

4 = 0000 0100.

Now convert 4 into 2's complement i.e 1111 1011.

+ 1.
-----------.
1111 1100.

Now add this by 18.

0001 0010.
+1111 1100.
-------------.
1 0000 1110.

Neglect carry hence we got the answer.