Assertion (A): Utility software performs tasks to allow smooth functioning of a computer system.

Reasoning (R): Without utility software, it is not possible for a computer system to work.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Cache memory is an extremely fast memory that is placed between the CPU and RAM.

Reasoning (R): Cache memory temporarily stores frequently used instructions and data for quicker processing by the Central Processing Unit (CPU) of a computer.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

How does an ALU work?

Briefly explain the working of a control unit.