Computer System Chapter 01 XIAB

Define the difference between analog and digital signals.

• Analog signals are discrete and represent data; digital signals are continuous.

• Analog signals are always digital; digital signals are continuous.

• Analog signals are continuous and represent physical quantities; digital signals are discrete and represent data in binary form.

• Analog signals use binary code; digital signals use waveforms.

What are the basic logic gates used in digital circuits?

• ADD, SUBTRACT, MULTIPLY

• AND, OR, NOT, ADD

• AND, OR, NOT, NAND, NOR, XOR, XNOR

• XOR, XNOR, DIVIDE

Explain the first phase of the Software Development Life Cycle (SDLC).

• The first phase of the SDLC is the 'Deployment' phase.

• The first phase of the SDLC is the 'Testing' phase.

• The first phase of the SDLC is the 'Maintenance' phase.

• The first phase of the SDLC is the 'Planning' phase.

What is a star network topology?

• A star network topology connects devices in a linear fashion.

• A star network topology requires each device to connect directly to every other device.

• A star network topology is a network configuration where all devices are connected to a central hub or switch.

• A star network topology has devices connected in a ring formation.

How many bits are in a byte?

• 16

• 32

• 8

• 4

What is the purpose of a NOT gate in digital logic?

• The purpose of a NOT gate is to invert the input signal.

• The purpose of a NOT gate is to combine multiple input signals.

• The purpose of a NOT gate is to delay the input signal.

• The purpose of a NOT gate is to amplify the input signal.

What is the difference between a mesh and a bus network topology?

• A mesh topology connects devices to a single central cable, while a bus topology provides multiple direct connections.

• A bus topology allows for more devices to connect than a mesh topology.

• A mesh topology is less reliable than a bus topology due to fewer connections.

• A mesh topology provides multiple direct connections between devices, while a bus topology connects devices to a single central cable.

What is the role of encryption in cybersecurity?

• Encryption is a method for data storage optimization.

• Encryption speeds up data transfer rates.

• Encryption secures data by making it unreadable to unauthorized users.

• Encryption is used to create backups of data.

What is a truth table and how is it used in logic gates?

• A truth table is a type of logic gate.

• A truth table only applies to binary numbers.

• A truth table is used to calculate the area of shapes.

• A truth table is a tool used to represent the output of logic gates for all possible input combinations.

What are the advantages of using a waterfall model in SDLC?

• Best suited for projects with high uncertainty

• Complex management with many stages

• Flexible structure for changing requirements

• Advantages of using a waterfall model include clear structure, easy management, well-defined stages, and suitability for projects with stable requirements.