Word Length in a Digital Computer

The number of bits that a digital computer can process in parallel at a time is known as the word length. It refers to the size of the registers or data paths within the computer's central processing unit (CPU) that can be manipulated or processed simultaneously. The word length determines the maximum amount of information that can be processed at once, which in turn affects the computer's performance and capabilities.

Definition of Word Length:

The word length is the number of bits that can be processed in a single instruction or operation by the computer's CPU. It determines the maximum size of data that can be stored in the computer's memory or operated on by the CPU. The word length is typically a fixed value for a given computer architecture and is usually expressed in bits.

Importance of Word Length:

The word length is a critical factor in determining the performance and capabilities of a digital computer. It affects several aspects of the computer's operation, including:

1. Processing Speed: A larger word length allows more data to be processed in parallel, leading to faster computation and higher processing speeds.

2. Memory Capacity: The word length determines the maximum size of data that can be stored in the computer's memory. A larger word length allows for larger memory capacity and the ability to handle more complex data types.

3. Precision: In numerical computations, the word length affects the precision of the calculations. A longer word length provides greater precision and reduces the chances of rounding errors.

4. Addressable Memory: The word length also determines the maximum addressable memory size. In many computer architectures, the addressable memory is limited by the word length.

Conclusion:

In conclusion, the word length in a digital computer refers to the number of bits that can be processed in parallel at a time. It plays a crucial role in determining the computer's processing speed, memory capacity, precision, and addressable memory. A larger word length generally leads to improved performance and increased capabilities of the computer. Therefore, the correct answer to the given question is option 'C' - word length.