System Programming MCQs with Answers
Practice important System Programming MCQs with answers and explanations.
Chapter: 152
Q3341:
What is the role of InterlockedIncrement(&mBlock.mSequence) in Produce()?
A. Increase message count atomically
B. Signal event
C. Release mutex
D. Reset flags
Correct Answer:
A
Chapter: 152
Q3342:
What function waits for the consumer and producer threads to finish?
A. WaitForSingleObject
B. CreateMutex
C. CloseHandle
D. ReportError
Correct Answer:
A
Chapter: 152
Q3343:
The message checksum is calculated using which operator?
A. AND
B. XOR
C. OR
D. NOT
Correct Answer:
B
Chapter: 152
Q3344:
What does the Consume thread do when the user inputs 's'?
A. Sets fStop flag to stop consumption
B. Consumes the next message
C. Displays the message
D. Resets the mutex
Correct Answer:
A
Chapter: 152
Q3345:
In the Consume thread, what does WaitForSingleObject(mBlock.mReady, INFINITE) do?
A. Waits until a message is ready
B. Waits for mutex
C. Waits for thread completion
D. Waits for user input
Correct Answer:
A
Chapter: 152
Q3346:
Which function is responsible for displaying message details?
A. MessageDisplay
B. MessageFill
C. Produce
D. Consume
Correct Answer:
A
Chapter: 152
Q3347:
Mutexes ensure:
A. Exclusive access to message data
B. Simultaneous access to message data
C. Message duplication
D. Unrestricted access
Correct Answer:
A
Chapter: 152
Q3348:
If the checksum validation fails during MessageDisplay, what happens?
A. The message is discarded
B. The message is processed anyway
C. The program crashes
D. The checksum is recalculated
Correct Answer:
A
Chapter: 152
Q3349:
The MSG_BLOCK structure uses which data type for the message buffer?
A. DWORD
B. CHAR
C. INT
D. HANDLE
Correct Answer:
B
Chapter: 152
Q3350:
What does the fStop flag signify in the Producer-Consumer program?
A. Stop producing and consuming
B. Ready message
C. Mutex status
D. Checksum error
Correct Answer:
A
Chapter: 152
Q3351:
The producer uses which synchronization primitive to guard the message block?
A. Event
B. Mutex
C. Semaphore
D. Critical Section
Correct Answer:
B
Chapter: 152
Q3352:
The producer-consumer problem solution described is implemented using which programming language?
A. C++
B. Java
C. C#
D. Python
Correct Answer:
A
Chapter: 152
Q3353:
fReady and fStop are examples of:
A. Flags
B. Mutexes
C. Events
D. Threads
Correct Answer:
A
Chapter: 152
Q3354:
In the context of the code, what does SetEvent() function do?
A. Signals that a message is ready
B. Locks the message buffer
C. Starts the producer thread
D. Stops the consumer thread
Correct Answer:
A
Chapter: 152
Q3355:
The consumer thread checks the command input. What are the valid commands?
A. c and s
B. a and b
C. x and y
D. p and q
Correct Answer:
A
Chapter: 152
Q3356:
When the consumer consumes a message, what happens to nCons?
A. It increments
B. It decrements
C. It resets
D. It remains unchanged
Correct Answer:
A
Chapter: 152
Q3357:
The condition 0 <= nLost + nCons <= mSequence ensures:
A. Message count consistency
B. Checksum validity
C. Mutex locking
D. Thread synchronization
Correct Answer:
A
Chapter: 152
Q3358:
What is the initial value of mBlock as defined in the program?
A. All zeros
B. All ones
C. Random values
D. Uninitialized
Correct Answer:
A
Chapter: 152
Q3359:
Which synchronization object type is created by CreateMutex?
A. Event
B. Mutex
C. Semaphore
D. Critical Section
Correct Answer:
B
Chapter: 152
Q3360:
MessageFill uses a for loop to:
A. Fill mData with random values
B. Lock mutex
C. Validate checksum
D. Wait for event
Correct Answer:
A