CUET PG 2026 — Computer PYQ

Solution

In digital electronics, a register is a group of flip-flops. Its primary purpose is explained through the following technical points:

• Storage Element: A single flip-flop is a $1$-bit storage cell. When we group $n$ flip-flops together, we create an $n$-bit register capable of holding $n$ bits of binary data.

• Data Retention: Registers are used within the CPU (Central Processing Unit) to hold data temporarily so that it can be accessed quickly by the ALU (Arithmetic Logic Unit).

• Binary Information: The fundamental function is to store binary information ($0$s and $1$s) until it is needed for processing or transferred to another part of the system.

• Comparison of options:

  • Option (a): Arithmetic operations are performed by the ALU.

  • Option (c): Comparing numbers is done by a Comparator.

  • Option (d): Encoding signals is done by an Encoder.

Conclusion

The fundamental function of a register is to store binary information.

The correct option is (b).