The correct answer is: D. logical
A digital computer is a device that manipulates numbers and symbols according to instructions stored in its memory. It does this by performing a series of logical operations on the data it receives. These operations are based on the principles of Boolean algebra, which is a branch of mathematics that deals with logic and truth.
Boolean algebra is based on the idea that there are only two possible states: true or false. This is in contrast to traditional mathematics, which deals with numbers that can be any value. In Boolean algebra, each variable can only be either true or false.
The basic operations of Boolean algebra are AND, OR, and NOT. AND is true only if both of its operands are true. OR is true if either of its operands is true. NOT is true if its operand is false.
These three operations can be combined to create more complex logical expressions. For example, the expression (A AND B) OR C is true if either A and B are true, or if C is true.
Digital computers use Boolean algebra to perform logical operations on the data they receive. This allows them to perform a wide variety of tasks, from simple calculations to complex problem-solving.
The other options are incorrect because they do not accurately describe the operation of a digital computer.
- Option A, counting, is incorrect because digital computers do not actually count. They perform logical operations on data.
- Option B, measuring, is incorrect because digital computers do not measure anything. They perform logical operations on data.
- Option C, electronic, is incorrect because digital computers are not just electronic devices. They are also logical devices.
- Option E, none of the above, is incorrect because the correct answer is option D.