DLD Quiz 02

In a busy city, a traffic control system is designed to manage multiple traffic signals at various intersections. What is the primary function of this traffic control system?

• To convert traffic signals into pedestrian signals.

• To store traffic data for later analysis.

• To amplify the sound of traffic alerts for better clarity.

• To select one of many traffic signals and route it to a single control center.

In a digital communication system, GULSHAAN is responsible for managing data flow. He uses a multiplexer to route data from multiple sources into a single channel for transmission. INAM UL HASSAN, on the other hand, uses a demultiplexer at the receiving end to separate the incoming data back into its original sources. How does a demultiplexer differ from a multiplexer?

• A multiplexer and a demultiplexer perform the same function in digital circuits.

• A multiplexer splits one input into multiple outputs, while a demultiplexer combines multiple outputs into one input.

• A multiplexer routes one input to multiple outputs, while a demultiplexer combines multiple inputs into one output.

• A multiplexer combines multiple inputs into one output, while a demultiplexer routes one input to multiple outputs.

Jawad is working on a digital circuit project where he needs to control multiple devices based on specific input signals. He needs to define the role of a decoder in her circuit design.

• A decoder converts analog signals into digital format.

• A decoder stores data in memory for later retrieval.

• A decoder amplifies input signals to increase their strength.

• A decoder translates binary input signals into a unique output line, enabling the selection of specific outputs based on the input code.

BILAL is sending a large amount of data over the internet to his colleague ALI DAAR. What is the purpose of an encoder in data transmission?

• To enhance data security during transmission.

• To convert data into a format suitable for transmission.

• To compress data for faster transmission.

• To store data in a database before transmission.

UMER is working on a project where he needs to ensure data integrity during transmission. He decided to use a parity encoder to help with this task. Explain how a parity encoder works in this context.

• A parity encoder generates a parity bit based on the input bits to ensure even or odd parity.

• A parity encoder adds extra bits to increase data size without error detection.

• A parity encoder is used to compress data for faster transmission.

• A parity encoder only transmits the original data without modification.

Ali Hassan is designing a digital circuit for a new gadget. He needs a component that can store and maintain a single bit of data. What are latches used for in digital electronics?

• Latches are used to store and maintain a single bit of data in digital circuits.

• Latches are used to amplify signals in digital circuits.

• Latches are used to perform arithmetic operations in digital circuits.

• Latches are used to convert analog signals to digital signals.

SHAYAN is working on a project that involves designing a digital clock. He needs to choose a display that can show the time clearly. What is the function of a 7-segment display in his project?

• To measure temperature and humidity levels.

• The function of a 7-segment display is to visually represent numerical digits and some letters by illuminating specific segments.

• To provide audio output for digital devices.

• To display images and graphics by lighting up all segments.

In a small electronics workshop, NAVEED is designing a circuit that includes a 2-to-4 decoder. He needs to determine how many inputs this decoder will require for her project.

• 2

• 1

• 4

• 3

During a crucial data transmission between two computers in a network, James noticed that some of the data packets were arriving corrupted. To address this issue, he decided to implement a system that uses parity bits. What is the significance of parity bits in error detection?

• Parity bits are used to increase data transmission speed.

• Parity bits are a method for data compression.

• Parity bits help in detecting errors in data transmission by ensuring the integrity of the data.

• Parity bits are only relevant in analog signals.

In a digital communication system, HUZAIFA is trying to send multiple signals over a single channel. He wonders if a multiplexer can be used as a data selector to choose which signal to send at any given time. Can a multiplexer be used as a data selector? If so, how?

• A multiplexer is used to amplify signals.

• Yes, a multiplexer can be used as a data selector.

• A multiplexer cannot be used for data selection.

• A multiplexer only transmits analog signals.