Digital Circuits : Practice Questions and Answers

For logical manipulations, 1’s complement is used, as all logical operations take place with binary numbers.

Only one operation is required for 1’s complement operation. This includes only inversion of 1’s to 0’s and 0’s to 1’s.

The advantage of 2’s complement is that only one arithmetic operation is required for 2’s complement’s operation and that is only addition. Just by adding a 1 bit to 1’s complement, we get 2’s complement.

With the help of inverter the 1’s complement is easily obtained. Since, during the operation of 1’s complement 1 is converted into 0 and vice-versa and this is well suited for the inverter.

To check the overflow logic circuitry is used in each case. Overflow occurs when the processor cannot handle the result properly when it produces an out of the range output.

No explanation is available for this question yet.

An overflow is a software problem which occurs when the processor cannot handle the result properly when it produces an out of the range output.

If the number of bits in the sum exceeds the number of bits in each added numbers, it results in overflow and is also known as excess-one. In case of any arithmetic operation, if the result has less number of bits than the operands, then it is known as underflow condition.

RAM (i.e. Random Access Memory) is not a primary storage device.

A storage location of a computer is an address/memory location, used to store instructions and data.

CD-ROM is a non-volatile memory. Once a program is uploaded in it then it can’t be erasable. Thus, it stores the data permanently.

PROM has the capability to store the data due to the presence of MOSFET which is processed by the CPU. It is one-time programmable by the user.

As semiconductor memories enjoy common interface and technology between sensing and decoding circuitry and the storage element itself, so RAMs are self-compatible. Also, they provide high speed and fast operation.

RAM is more economical than ROM because MOS memories are more economical than the magnetic core for small and medium sized systems.

The advantages of RAM are Non-destructive read out, Fast operating speed and Low power dissipation.

RAMs are utilized in the computer as a scratch-pad, buffer and main memories. These are the applications of RAMs. Mostly, these RAMs are DRAMs as they provide high speed.

The full form of PSRAM is Pseudo Static RAM. It is a dynamic RAM having built-in fresh logic, which is implemented as a SRAM. So, it can not be accessed for read or write during the refresh operation.

The full form of PSRAM is Pseudo Static RAM. It is a dynamic RAM having built-in fresh logic, which is implemented as an SRAM.

The full form of PSRAM is Pseudo Static RAM. It is a dynamic RAM which is implemented as a SRAM.

IC 4116 is a DRAM of 16 KB storage memory. It requires three supply voltages (+5V, -5V, and +12V) to operate the IC unit.