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Memcached MCQs and Answers With Explanation – Memcached is an open-source, high-performance, distributed memory caching system that is widely used in web applications to speed up database-driven websites by caching data in memory. It is known for its simplicity, scalability, and performance, and is used by many popular websites such as Facebook, Twitter, and YouTube. Understanding Memcached and its commands is crucial for developers working on web applications that utilize this caching system. Now follow this article entirely to get the Top 50 Memcached MCQs.
Memcached MCQs
Through this article on Memcached Multiple Choice Questions, we’ll test your knowledge of Memcached and its various commands and configurations. This Memcached Quiz covers a range of topics including data storage, retrieval, deletion, configuration, and best practices for handling concurrent access, timeouts, and connection failures.
Memcached Multiple Choice Questions
| Name | Memcached |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 50 Memcached MCQ Questions | Practice Online Quiz
1. What is Memcached?
A. A web server
B. A distributed caching system
C. A database management system
D. A load balancer
Answer: B
Explanation: Memcached is an open-source, high-performance, distributed memory object caching system.
2. What is the primary use case for Memcached?
A. Database management
B. Web application caching
C. Network security
D. Operating system optimization
Answer: B
Explanation: Memcached is typically used for web application caching to improve website performance.
3. Which protocol does Memcached use for communication?
A. HTTP
B. TCP
C. FTP
D. SMTP
Answer: B
Explanation: Memcached uses the TCP protocol for communication between clients and servers.
4. How does Memcached store data?
A. In files
B. In a database
C. In memory
D. In a cache
Answer: C
Explanation: Memcached stores data in memory for fast access.
5. What is the maximum size of an object that can be stored in Memcached?
A. 1 MB
B. 5 MB
C. 10 MB
D. 20 MB
Answer: A
Explanation: The maximum size of an object that can be stored in Memcached is 1 MB.
6. Which of the following is not a supported programming language for Memcached?
A. PHP
B. Java
C. Python
D. COBOL
Answer: D
Explanation: COBOL is not a supported programming language for Memcached.
7. What is the default port number for Memcached?
A. 80
B. 443
C. 11211
D. 8080
Answer: C
Explanation: The default port number for Memcached is 11211.
8. Which of the following is not a typical use case for Memcached?
A. Session storage
B. Full-text search
C. Object caching
D. Page caching
Answer: B
Explanation: Full-text search is not a typical use case for Memcached.
9. How many servers can a Memcached cluster consist of?
A. 5
B. 10
C. 50
D. 100
Answer: D
Explanation: A Memcached cluster can consist of up to 100 servers.
10. Which of the following is not a feature of Memcached?
A. Replication
B. Sharding
C. Clustering
D. Compression
Answer: D
Explanation: Compression is not a feature of Memcached.
11. Which of the following is not a valid Memcached command?
A. SET
B. GET
C. DELETE
D. UPDATE
Answer: D
Explanation: UPDATE is not a valid Memcached command.
12. Which of the following Memcached commands allows you to retrieve multiple keys at once?
A. GET
B. SET
C. DELETE
D. FLUSH_ALL
Answer: A
Explanation: The GET command allows you to retrieve multiple keys at once.
13. Which of the following Memcached commands allows you to store a value with a specific expiration time?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: A
Explanation: The SET command allows you to store a value with a specific expiration time.
14. Which of the following Memcached commands allows you to delete a key-value pair?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: C
Explanation: The DELETE command allows you to delete a key-value pair.
15. Which of the following Memcached commands allows you to delete all key-value pairs?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: D
Explanation: The FLUSH_ALL command allows you to delete all key-value pairs.
16. Which of the following is not a supported Memcached data type?
A. String
B. Integer
C. Float
D. Boolean
Answer: D
Explanation: Boolean is not a supported Memcached data type.
17. Which of the following Memcached libraries supports connection pooling?
A. PHP Memcached
B. Python Memcached
C. Java Memcached
D. Ruby Memcached
Answer: A
Explanation: PHP Memcached supports connection pooling.
18. Which of the following Memcached libraries supports consistent hashing?
A. PHP Memcached
B. Python Memcached
C. Java Memcached
D. Ruby Memcached
Answer: C
Explanation: Java Memcached supports consistent hashing.
19. Which of the following is not a recommended practice for using Memcached?
A. Use a single Memcached server
B. Use multiple Memcached servers
C. Use a load balancer to distribute traffic
D. Use a failover mechanism
Answer: A
Explanation: Using a single Memcached server is not a recommended practice as it can result in a single point of failure.
20. What is the purpose of consistent hashing in Memcached?
A. To distribute keys evenly across multiple servers
B. To store data more efficiently
C. To reduce network latency
D. To improve security
Answer: A
Explanation: Consistent hashing is used in Memcached to distribute keys evenly across multiple servers.
21. Which of the following is not a benefit of using Memcached?
A. Reduced load on the database
B. Faster response times
C. Increased scalability
D. Improved security
Answer: D
Explanation: Memcached does not provide any significant improvements in security.
22. Which of the following is not a recommended use case for Memcached?
A. Caching frequently accessed database records
B. Storing large binary files
C. Storing frequently used API responses
D. Caching user sessions
Answer: B
Explanation: Memcached is not recommended for storing large binary files.
23. Which of the following is not a disadvantage of using Memcached?
A. Data loss on server failure
B. Limited storage capacity
C. Difficulty in managing large clusters
D. Slow read and write speeds
Answer: D
Explanation: Memcached is known for its fast read and write speeds.
24. Which of the following is not a type of Memcached deployment?
A. Single-server deployment
B. Multi-server deployment
C. Distributed deployment
D. Centralized deployment
Answer: D
Explanation: Centralized deployment is not a type of Memcached deployment.
25. Which of the following is a commonly used alternative to Memcached?
A. Redis
B. MongoDB
C. Cassandra
D. Elasticsearch
Answer: A
Explanation: Redis is a commonly used alternative to Memcached.
26. Which of the following is not a supported operating system for Memcached?
A. Windows
B. Linux
C. macOS
D. FreeBSD
Answer: A
Explanation: Windows is not a supported operating system for Memcached.
27. Which of the following is not a recommended hardware configuration for Memcached servers?
A. High CPU
B. High RAM
C. High disk space
D. Fast network connectivity
Answer: C
Explanation: High disk space is not a significant factor in determining the hardware configuration for Memcached servers.
28. Which of the following is not a recommended caching strategy for Memcached?
A. Cache everything
B. Cache frequently accessed data
C. Cache data with long expiration times
D. Cache data with short expiration times
Answer: A
Explanation: Caching everything can lead to performance issues and memory exhaustion.
29. What is the role of a Memcached client library?
A. To store data in Memcached
B. To retrieve data from Memcached
C. To manage Memcached servers
D. To configure Memcached
Answer: B
Explanation: The role of a Memcached client library is to retrieve data from Memcached.
30. Which of the following Memcached commands is used to retrieve data from Memcached?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: B
Explanation: The GET command is used to retrieve data from Memcached.
31. Which of the following Memcached commands is used to delete data from Memcached?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: C
Explanation: The DELETE command is used to delete data from Memcached.
32. Which of the following Memcached commands is used to store data in Memcached?
A. SET
B. GET
C. DELETE
D. FLUSH_ALL
Answer: A
Explanation: The SET command is used to store data in Memcached.
33. Which of the following is a common issue with Memcached?
A. Slow read and write speeds
B. Limited storage capacity
C. Data loss on server failure
D. Difficulty in managing large clusters
Answer: B
Explanation: Limited storage capacity is a common issue with Memcached.
34. Which of the following is not a recommended way to secure a Memcached deployment?
A. Use a firewall to restrict access
B. Use SSL/TLS encryption
C. Use password authentication
D. Use anonymous access
Answer: D
Explanation: Anonymous access is not a recommended way to secure a Memcached deployment.
35. Which of the following is a recommended way to handle data loss on server failure in Memcached?
A. Use replication
B. Use sharding
C. Use consistent hashing
D. Use load balancing
Answer: A
Explanation: Replication is a recommended way to handle data loss on server failure in Memcached.
36. Which of the following is a recommended way to handle a sudden increase in traffic to a Memcached deployment?
A. Use a failover mechanism
B. Use a load balancer
C. Use consistent hashing
D. Use data compression
Answer: B
Explanation: Using a load balancer is a recommended way to handle a sudden increase in traffic to a Memcached deployment.
37. Which of the following is a recommended way to reduce the load on the database in a Memcached deployment?
A. Use a failover mechanism
B. Use a load balancer
C. Use consistent hashing
D. Use caching
Answer: D
Explanation: Caching is a recommended way to reduce the load on the database in a Memcached deployment.
38. Which of the following is a recommended way to handle a Memcached server outage?
A. Use replication
B. Use sharding
C. Use consistent hashing
D. Use a failover mechanism
Answer: D
Explanation: Using a failover mechanism is a recommended way to handle a Memcached server outage.
39. Which of the following is a recommended way to handle a network failure in a Memcached deployment?
A. Use replication
B. Use sharding
C. Use consistent hashing
D. Use a failover mechanism
Answer: D
Explanation: Using a failover mechanism is a recommended way to handle a network failure in a Memcached deployment.
40. Which of the following is a recommended way to handle a sudden increase in data size in a Memcached deployment?
A. Use replication
B. Use sharding
C. Use consistent hashing
D. Use data compression
Answer: B
Explanation: Using sharding is a recommended way to handle a sudden increase in data size.
41. Which of the following Memcached commands is used to check if data exists in Memcached?
A. SET
B. GET
C. EXISTS
D. CHECK
Answer: C
Explanation: The EXISTS command is used to check if data exists in Memcached.
42. Which of the following is a recommended way to handle concurrent access to data in Memcached?
A. Use a locking mechanism
B. Use sharding
C. Use consistent hashing
D. Use a failover mechanism
Answer: A
Explanation: Using a locking mechanism is a recommended way to handle concurrent access to data in Memcached.
43. Which of the following is a recommended way to handle stale data in Memcached?
A. Use a TTL (time-to-live) value
B. Use replication
C. Use consistent hashing
D. Use sharding
Answer: A
Explanation: Using a TTL (time-to-live) value is a recommended way to handle stale data in Memcached.
44. Which of the following is a recommended way to handle a large number of small values in Memcached?
A. Use a single key-value pair
B. Use multiple key-value pairs
C. Use consistent hashing
D. Use sharding
Answer: B
Explanation: Using multiple key-value pairs is a recommended way to handle a large number of small values in Memcached.
45. Which of the following is a recommended way to handle a large number of large values in Memcached?
A. Use a single key-value pair
B. Use multiple key-value pairs
C. Use consistent hashing
D. Use sharding
Answer: A
Explanation: Using a single key-value pair is a recommended way to handle a large number of large values in Memcached.
46. Which of the following is a recommended way to handle a Memcached client timeout?
A. Use a retry mechanism
B. Use a failover mechanism
C. Use consistent hashing
D. Use sharding
Answer: A
Explanation: Using a retry mechanism is a recommended way to handle a Memcached client timeout.
47. Which of the following is a recommended way to handle a Memcached server timeout?
A. Use a retry mechanism
B. Use a failover mechanism
C. Use consistent hashing
D. Use sharding
Answer: B
Explanation: Using a failover mechanism is a recommended way to handle a Memcached server timeout.
48. Which of the following is a recommended way to handle a Memcached client connection failure?
A. Use a retry mechanism
B. Use a failover mechanism
C. Use consistent hashing
D. Use sharding
Answer: A
Explanation: Using a retry mechanism is a recommended way to handle a Memcached client connection failure.
49. Which of the following is a recommended way to handle a Memcached server connection failure?
A. Use a retry mechanism
B. Use a failover mechanism
C. Use consistent hashing
D. Use sharding
Answer: B
Explanation: Using a failover mechanism is a recommended way to handle a Memcached server connection failure.
50. Which of the following is not a recommended way to configure Memcached?
A. Use appropriate memory allocation
B. Use appropriate thread settings
C. Use appropriate network settings
D. Use anonymous access
Answer: D
Explanation: Anonymous access is not a recommended way to configure Memcached.
Memcached is a widely used caching system in web applications that offers high performance and scalability. Testing your knowledge of Memcached and its commands through these Memcached MCQs that the Freshersnow team has provided can help you gain a better understanding of how to efficiently use this caching system to speed up database-driven websites.