Clock Synchronization - Real-time Systems MCQs

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1. What is the main purpose of clock synchronization in real-time systems?
(A) To perform batch-only processing
(B) To manage memory allocation
(C) To ensure all system components have a consistent and accurate notion of time
(D) To replace scheduling algorithms

2. Clock synchronization is critical in distributed real-time systems because:
(A) CPU idle exclusively
(B) Tasks on different nodes must coordinate based on a shared time reference
(C) Disk batch-only processing
(D) Memory-only scheduling

3. Logical clocks in distributed systems are used to:
(A) Order events without relying on physical time
(B) CPU idle exclusively
(C) Disk batch-only operations
(D) Memory-only operations

4. Physical clock synchronization ensures:
(A) CPU idle exclusively
(B) All nodes’ clocks match a common time standard like UTC
(C) Disk batch-only alignment
(D) Memory-only timing

5. Cristian’s algorithm in clock synchronization:
(A) CPU idle exclusively
(B) Synchronizes a client clock using a time server and network message exchange
(C) Disk batch-only synchronization
(D) Memory-only timing

6. The Berkeley algorithm in distributed systems:
(A) CPU idle exclusively
(B) Uses an averaging approach to synchronize clocks without an external time source
(C) Disk batch-only synchronization
(D) Memory-only timing

7. NTP (Network Time Protocol) is widely used for:
(A) CPU idle exclusively
(B) Synchronizing clocks over packet-switched networks
(C) Disk batch-only time management
(D) Memory-only clocks

8. Clock drift refers to:
(A) Disk batch-only time shifts
(B) CPU idle exclusively
(C) The gradual deviation of a clock from the correct time
(D) Memory-only drift

9. Skew in clock synchronization is:
(A) The difference in time readings between two clocks at a specific instant
(B) CPU idle exclusively
(C) Disk batch-only difference
(D) Memory-only deviation

10. In real-time distributed systems, clock synchronization helps to:
(A) Disk batch-only scheduling
(B) CPU idle exclusively
(C) Maintain temporal consistency and meet task deadlines
(D) Memory-only consistency

11. Lamport timestamps are used for:
(A) Disk batch-only ordering
(B) CPU idle exclusively
(C) Establishing a partial ordering of events in distributed systems
(D) Memory-only sequencing

12. Maximum clock drift tolerance in a real-time system affects:
(A) How often clocks must be resynchronized
(B) CPU idle exclusively
(C) Disk batch-only updates
(D) Memory-only timing

13. Synchronized clocks improve real-time system reliability by:
(A) Disk batch-only reliability
(B) CPU idle exclusively
(C) Ensuring events and actions are executed in correct temporal order
(D) Memory-only accuracy

14. Clock synchronization in sensor networks is important to:
(A) Correlate data from different sensors with accurate timestamps
(B) CPU idle exclusively
(C) Disk batch-only logging
(D) Memory-only recording

15. In distributed real-time systems, unsynchronized clocks can cause:
(A) Incorrect event ordering and deadline violations
(B) CPU idle exclusively
(C) Disk batch-only errors
(D) Memory-only misalignments

16. Precision in clock synchronization refers to:
(A) Memory-only accuracy
(B) CPU idle exclusively
(C) Disk batch-only timing
(D) How closely the clocks agree with each other

17. Accuracy in clock synchronization refers to:
(A) How closely the clocks match a reference time source
(B) CPU idle exclusively
(C) Disk batch-only measurement
(D) Memory-only comparison

18. Time-stamping in real-time systems requires:
(A) Disk batch-only logging
(B) CPU idle exclusively
(C) Synchronized clocks to maintain event order and data consistency
(D) Memory-only tagging

19. Clock synchronization protocols must handle:
(A) CPU idle exclusively
(B) Message delays, network latency, and clock drift
(C) Disk batch-only delays
(D) Memory-only offsets

20. The main advantage of clock synchronization in real-time systems is:
(A) CPU idle exclusively
(B) Reliable, consistent, and temporally correct system operation across nodes
(C) Disk batch-only optimization
(D) Memory-only consistency

Clock Synchronization – Real-time Systems MCQs

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