Visual Programming MCQs with Answers
Practice important Visual Programming MCQs with answers and explanations.
Chapter: 2
Q41:
What is an "improving driver" in the flower delivery system?
A. A driver who accepts more assignments over time.
B. A driver whose assignments increase or stay the same day by day.
C. A driver who has higher rankings over time.
D. A driver who takes additional training.
Correct Answer:
B
Chapter: 2
Q42:
What does event-driven programming focus on?
A. Writing code that executes sequentially without interruptions.
B. Performing operations based on the occurrence and handling of events.
C. Maximizing CPU usage by continuous polling.
D. Managing memory allocation efficiently.
Correct Answer:
B
Chapter: 2
Q43:
Which of the following is a key benefit of event-driven programming mentioned in the lecture?
A. It simplifies multi-threading.
B. It scales well to applications with multiple GUI elements and many event sources.
C. It eliminates the need for asynchronous operations.
D. It ensures real-time performance.
Correct Answer:
B
Chapter: 2
Q44:
In the context of the lecture, what does "deterministic" mapping mean in event processing systems?
A. The mapping from real-world events to system events always follows a predictable pattern.
B. The mapping is random and cannot be predicted.
C. The mapping does not correlate with real-world events.
D. The mapping only applies to synchronous operations.
Correct Answer:
A
Chapter: 2
Q45:
Why might one prefer event-driven programming over a non-event-driven approach?
A. Because event-driven programming always performs better.
B. Because it avoids blocking operations and can handle multiple events efficiently.
C. Because it uses less memory.
D. Because it requires less code.
Correct Answer:
B
Chapter: 2
Q46:
In the code example, what would happen if the iskeyboardpressed() function always returns false?
A. The program would never terminate.
B. The program would only respond to file changes.
C. The program would respond to both keyboard and file events.
D. The program would exit immediately.
Correct Answer:
B
Chapter: 2
Q47:
In the refactored code, which part is responsible for handling file change events?
A. The onkeypress() function.
B. The onfilechanged() function.
C. The main() function.
D. The f.peek() function.
Correct Answer:
B
Chapter: 2
Q48:
In the refactored code, why is f.close() called after handling file changes?
A. To ensure the file is not read again.
B. To release the file resource.
C. To check if the file has changed.
D. To reopen the file.
Correct Answer:
B
Chapter: 2
Q49:
What would be a potential problem in the code example provided in Lecture 1 that was mentioned in Lecture 2?
A. Busy wait.
B. Memory leak.
C. Syntax errors.
D. Security vulnerabilities.
Correct Answer:
A
Chapter: 2
Q50:
What is the purpose of refactoring code into functions like onkeypress() and onfilechanged()?
A. To make the code run faster.
B. To make the code more focused and handle one thing at a time.
C. To make the code use less memory.
D. To make the code less readable.
Correct Answer:
B
Chapter: 2
Q51:
In the context of event processing, what is the difference between observed events and deduced events?
A. Observed events are generated by the system, deduced events are inferred by the system.
B. Observed events require a reaction, deduced events do not.
C. Observed events are detected directly, deduced events are inferred from observed events.
D. Observed events are synchronous, deduced events are asynchronous.
Correct Answer:
C
Chapter: 2
Q52:
Which of the following is NOT an example of an event in computing systems as given in the lecture?
A. Interrupts.
B. File changes.
C. Multi-threading conflicts.
D. Sensor alerts.
Correct Answer:
C
Chapter: 2
Q53:
In the context of the lecture, what does "blocking" mean in event-driven programming?
A. When an operation prevents further operations from proceeding until it completes.
B. When an operation runs in a separate thread.
C. When an operation is scheduled to run after a delay.
D. When an operation is canceled.
Correct Answer:
A
Chapter: 2
Q54:
What does "event-based architecture" refer to?
A. An architecture where components are tightly coupled.
B. An architecture where the flow is controlled by events and their handlers.
C. An architecture designed for batch processing.
D. An architecture that ignores user input.
Correct Answer:
B
Chapter: 2
Q55:
What is an example of a probabilistic event mentioned in the lecture?
A. A mouse click event.
B. A fraud detection event on a banking transaction.
C. A file open event.
D. A network packet received.
Correct Answer:
B
Chapter: 2
Q56:
In event-driven programming, what does "scaling well" refer to?
A. The application can run on multiple operating systems.
B. The application can handle an increasing number of events and event sources efficiently.
C. The application can use multiple programming languages.
D. The application can be easily translated into other languages.
Correct Answer:
B
Chapter: 2
Q57:
What does the term "busy wait" refer to, as mentioned in the lecture?
A. Continuously checking for a condition without doing useful work.
B. Waiting for user input.
C. Waiting for a network response.
D. Waiting for a file to be opened.
Correct Answer:
A
Chapter: 3
Q58:
What type of architecture does a web browser typically use?
A. Event-driven
B. Request-response
C. Service-oriented
D. Peer-to-peer
Correct Answer:
B
Chapter: 3
Q59:
What is the main difference between events and requests in software architecture?
A. Events ask for something to happen, requests are based on past actions
B. Events have already happened, requests ask for something to happen
C. Events are synchronous, requests are asynchronous
D. Events are service-based, requests are client-based
Correct Answer:
B
Chapter: 3
Q60:
In event-driven architecture, who typically initiates communication?
A. The server
B. The client
C. The event producer
D. The event consumer
Correct Answer:
C