Digital Systems Quiz

What defines a digital system?

• A system that represents information by continuous signals

• A system that represents information by discrete signals

• A system that transmits only analog information

• A system with varying physical quantities

The telegraph is considered a digital system because:

• It transmits information using Morse code

• It uses continuous signal transmission

• It represents data with pulses of varying lengths

• It processes analog information only

A dial telephone functions as a digital system because:

• It uses a constant, continuous signal

• The dial produces pulses counted by switches

• It operates based on a binary system

• It has no direct connection to digital devices

What is 'switching theory'?

• A theory describing the design of analog circuits

• A theory regarding the function of computer networks

• A theory developed from the use of telephone switches

• A theory about continuous signal modulation

The I/O section of a digital computer includes:

• Magnetic and electronic memory only

• Arithmetic circuits and registers

• Devices like Keyboard and Joystick

• Only the central processing unit

Which component temporarily stores information in a digital computer?

• Input devices

• Output interfaces

• Registers in the ALU

• All types of memory units

The Arithmetic-Logic Unit (ALU) primarily:

• Stores permanent data

• Manages the I/O operations

• Processes data using logical circuits

• Controls all computer functions

In a combinational digital circuit:

• The output depends only on current inputs

• The output depends on past input sequences

• It has a combination of input and storage

• It functions only in analog systems

A sequential digital circuit's output depends on:

• The combination of all inputs only

• Both current inputs and past events

• Current inputs only

• The total number of inputs applied

What is the purpose of a logic gate in digital circuits?

• To amplify signals in the circuit

• To control the flow of analog data

• To perform logical operations based on inputs

• To store data temporarily