Logic Circuit Design - Comp. Viva

A bulb in the staircase has two switches, one on the ground floor and the other on the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches, irrespective of the state of the other switch. The logic of switching on the bulb resembles ______.

• An AND gate
• An OR gate
• An XOR gate
• A NAND gate

The decimal value of the signed binary number 10101010 expressed in 2’s complement form will be

• -42.0
• -86.0
• -116.0
• -170.0

The smallest integer that can be represented by an 8-bit number in 2’s complement form

• -128.0
• -32.0
• -64.0
• -256.0

The representation of the value of a 16-bit unsigned integer X in a hexadecimal number system is BCA9. The representation of the value of X in the octal number system is

• 571244.0
• 736251.0
• 571247.0
• 136251.0

Let X be the number of distinct 16-bit integers in 2’s complement representation. Let Y be the number of distinct 16-bit integers in sign-magnitude representation. THen X-Y is

• 1.0
• 255
• 65535.0
• 32767.0

In IEEE 32-bit representations, the mantissa of the fraction is said to occupy ____bits.

• 24.0
• 23.0
• 20.0
• 16.0

In double precision format, the size of the mantissa is _____.

• 32 bit
• 52 bit
• 64 bit
• 72 bit

The hexadecimal representation of 657 of octal is

• D78
• 1AF
• D71
• 32F

The decimal equivalent of the hexadecimal number C3B1 is

• 12197.0
• 32097.0
• 52097.0
• 50097.0

The octal equivalent of hexadecimal D.C is

• 15.6
• 61.6
• 15.3
• 61.3