Binary System — Set 3
Computers · बाइनरी सिस्टम · Questions 21–30 of 60
What is the result of the binary OR operation on bits 1 and 0?
Correct Answer: D. 1
The OR gate outputs a '1' if at least one of its inputs is '1'. Since one input is true, the resulting state is true or 1. This operation is fundamental for setting specific bits in a data word.
Which binary number represents the decimal value 8?
Correct Answer: C. 1000
The value 8 is represented by a '1' in the fourth position (2^3). All positions to the right are set to 0. This illustrates how binary values grow exponentially with each added digit.
What is the term for a binary digit that is used to check for errors during data transmission?
Correct Answer: A. Parity bit
A parity bit is an extra bit added to a string of binary code to ensure that the total number of set bits is even or odd. It allows the receiving system to detect simple errors that occur during transit. This is a basic form of error detection in digital communication.
In a 8-bit binary number, which bit is known as the Most Significant Bit (MSB)?
Correct Answer: D. The bit on the far left
The Most Significant Bit is the bit with the highest positional value, located at the far left. In an 8-bit number, the MSB has a weight of 128 (2^7). It is often used to indicate whether a number is positive or negative in signed notation.
What is the binary representation of the decimal number 0?
Correct Answer: A. 0
Zero is represented by '0' in binary, just as it is in the decimal system. It signifies the complete absence of value or an 'off' electrical state. In any base system, zero always remains represented by the same symbol.
Which logic gate outputs a '1' only if its two inputs are different from each other?
Correct Answer: C. XOR Gate
The XOR (Exclusive OR) gate outputs true only when the inputs are 1 and 0 or 0 and 1. It is widely used in arithmetic circuits like adders and for simple encryption. If both inputs are the same, the output is always 0.
How many bits are in 2 bytes of computer memory?
Correct Answer: A. 16
Since one byte is 8 bits, two bytes equal 16 bits. This was the standard word size for many early home computers. It allows for 65,536 different unique values to be represented.
The 'LSB' in binary terminology stands for?
Correct Answer: D. Least Significant Bit
The Least Significant Bit is the bit at the far right of a binary number with a weight of 1 (2^0). Changing this bit has the smallest possible impact on the overall value of the number. It is used to determine if a binary number is even or odd.
What is the binary equivalent of decimal 3?
Correct Answer: A. 11
Decimal 3 is the sum of 2 and 1, so the binary representation is 11. Both the first and second positional slots are set to 'on'. It is the largest value that can be represented by only two binary digits.
In binary multiplication, what is the result of 1 x 0?
Correct Answer: A. 0
Binary multiplication follows the same rules as decimal multiplication where any number multiplied by zero is zero. The four possible outcomes are 0x0=0, 0x1=0, 1x0=0, and 1x1=1. This logic is physically implemented using AND gates in processors.