What is the primary purpose of caching in ASP.NET?
a. To improve application performance by storing frequently accessed data
b. To increase the size of web pages
c. To encrypt sensitive data
d. To handle user authentication
Answer: a. To improve application performance by storing frequently accessed data
Which caching method is used to store data on the server side in ASP.NET?
a. Server-side caching
b. Client-side caching
c. Distributed caching
d. Memory caching
Answer: a. Server-side caching
Which caching mechanism stores data on the client’s browser?
a. Client-side caching
b. Server-side caching
c. Distributed caching
d. In-memory caching
Answer: a. Client-side caching
What is the default caching provider in ASP.NET?
a. In-memory cache
b. SQL Server cache
c. Redis cache
d. Azure cache
Answer: a. In-memory cache
How do you specify the duration for caching an item in ASP.NET?
a. By setting the absolute or sliding expiration time
b. By configuring cache expiration in the web.config
c. By specifying cache keys
d. By setting cache priorities
Answer: a. By setting the absolute or sliding expiration time
Which class is used for managing items in ASP.NET in-memory cache?
a. MemoryCache
b. Cache
c. CacheItem
d. CacheManager
Answer: a. MemoryCache
What does the CacheItemPolicy class define in the MemoryCache class?
a. Expiration and eviction policies for cached items
b. The priority of cache items
c. The size of cached items
d. The source of cached items
Answer: a. Expiration and eviction policies for cached items
How can you clear a specific item from the ASP.NET cache?
a. By using the Remove method on the cache object
b. By setting the item’s expiration time to now
c. By using the Flush method
d. By removing the cache entry from the configuration file
Answer: a. By using the Remove method on the cache object
What is the difference between absolute expiration and sliding expiration in caching?
a. Absolute expiration sets a fixed time when the cache item will expire, while sliding expiration resets the expiration time with each access
b. Sliding expiration sets a fixed time, while absolute expiration resets the expiration time
c. Both methods work the same way
d. Absolute expiration is used for client-side caching, while sliding expiration is for server-side caching
Answer: a. Absolute expiration sets a fixed time when the cache item will expire, while sliding expiration resets the expiration time with each access
Which method is used to add an item to the cache in ASP.NET?
a. Add method
b. Put method
c. Insert method
d. Set method
Answer: a. Add method
How can you implement cache dependency in ASP.NET?
a. By associating a cached item with a file, database, or other resource
b. By setting the cache expiration policy
c. By using a cache key prefix
d. By configuring the cache in the web.config
Answer: a. By associating a cached item with a file, database, or other resource
What is a common use case for distributed caching in ASP.NET?
a. Sharing cached data across multiple server instances in a web farm
b. Caching data for a single server
c. Storing data temporarily on the client’s browser
d. Managing session state
Answer: a. Sharing cached data across multiple server instances in a web farm
Which caching approach uses HttpRuntime.Cache in ASP.NET Web Forms?
a. In-memory caching
b. Distributed caching
c. Client-side caching
d. Database caching
Answer: a. In-memory caching
How can you handle cache invalidation when using ASP.NET caching?
a. By setting expiration policies and cache dependencies
b. By manually removing cached items
c. By configuring cache size limits
d. By updating the cache entry
Answer: a. By setting expiration policies and cache dependencies
What is the purpose of the CacheItemRemovedCallback delegate?
a. To handle the event when a cache item is removed
b. To add items to the cache
c. To update existing cache items
d. To clear all items from the cache
Answer: a. To handle the event when a cache item is removed
Which caching strategy involves storing data in a distributed cache system?
a. Distributed caching
b. In-memory caching
c. Client-side caching
d. Persistent caching
Answer: a. Distributed caching
How can you monitor cache performance and usage in an ASP.NET application?
a. By using performance counters and cache profiling tools
b. By examining the cache configuration in web.config
c. By reviewing server logs
d. By manually counting cache hits and misses
Answer: a. By using performance counters and cache profiling tools
What does the Cache.Add method do when an item with the same key already exists?
a. It does not add the item and returns false
b. It replaces the existing item with the new one
c. It throws an exception
d. It updates the existing item with new expiration settings
Answer: a. It does not add the item and returns false
Which class is used for caching data across multiple web applications in ASP.NET?
a. SqlCacheDependency
b. RedisCache
c. ObjectCache
d. DistributedCache
Answer: b. RedisCache
What is the advantage of using a sliding expiration in caching?
a. It extends the cache duration with each access, keeping frequently accessed data in cache longer
b. It ensures data is always cached for a fixed duration
c. It removes data from the cache immediately after it expires
d. It makes the cache less reliable
Answer: a. It extends the cache duration with each access, keeping frequently accessed data in cache longer
How do you configure cache settings in an ASP.NET Core application?
a. By using the Startup class and configuring services with services.AddMemoryCache()
b. By modifying the web.config file
c. By using the Cache class directly in code
d. By setting cache parameters in the appsettings.json file
Answer: a. By using the Startup class and configuring services with services.AddMemoryCache()
Which caching strategy is suitable for large-scale web applications requiring high availability?
a. Distributed caching
b. Client-side caching
c. In-memory caching
d. File-based caching
Answer: a. Distributed caching
What is the purpose of cache expiration policies?
a. To determine when a cache item should be removed or refreshed
b. To encrypt cache data
c. To compress cache data
d. To synchronize cache data across servers
Answer: a. To determine when a cache item should be removed or refreshed
How can you implement caching in ASP.NET MVC using ActionFilters?
a. By creating a custom ActionFilterAttribute and setting cache properties
b. By configuring caching in web.config
c. By using caching methods in controller actions
d. By applying cache settings to view files
Answer: a. By creating a custom ActionFilterAttribute and setting cache properties
What is a potential drawback of using caching extensively?
a. Increased memory usage and complexity in cache management
b. Decreased application performance
c. Increased network bandwidth usage
d. Reduced application scalability
Answer: a. Increased memory usage and complexity in cache management
How do you clear all cached items in ASP.NET?
a. By calling the Cache.Remove method on each item
b. By using the Cache.Clear method
c. By restarting the application
d. By updating the cache configuration
Answer: b. By using the Cache.Clear method
What is the primary benefit of using a cache expiration policy based on time-to-live (TTL)?
a. It automatically removes stale data after a specified period
b. It ensures that cached data is always up-to-date
c. It reduces the amount of data stored in the cache
d. It provides an immediate response for all cache requests
Answer: a. It automatically removes stale data after a specified period
How do you implement caching for static data that does not change frequently?
a. By using absolute expiration to cache the data for a long duration
b. By using sliding expiration to refresh the data regularly
c. By avoiding caching for static data
d. By configuring cache dependencies for the data
Answer: a. By using absolute expiration to cache the data for a long duration
What is the role of the CacheDependency class in caching?
a. It specifies conditions under which a cached item should be invalidated
b. It encrypts cached data
c. It manages the size of the cache
d. It handles cache events
Answer: a. It specifies conditions under which a cached item should be invalidated
How can you handle cache coherence in a distributed caching environment?
a. By using a distributed cache system that handles coherence internally
b. By manually synchronizing cache data across servers
c. By setting up replication between cache servers
d. By disabling caching on multiple servers
Answer: a. By using a distributed cache system that handles coherence internally
What is the effect of setting a high priority for a cached item?
a. The item is less likely to be removed from the cache when memory is low
b. The item is removed from the cache more quickly
c. The item is always stored in the cache
d. The item uses more disk space
Answer: a. The item is less likely to be removed from the cache when memory is low
Which method is used to retrieve an item from the cache in ASP.NET?
a. Cache.Get
b. Cache.Fetch
c. Cache.Retrieve
d. Cache.Find
Answer: a. Cache.Get
How can you implement cache sliding expiration for a specific item?
a. By setting a sliding expiration time when adding the item to the cache
b. By configuring sliding expiration in the web.config file
c. By using cache dependency settings
d. By defining cache expiration in the Startup class
Answer: a. By setting a sliding expiration time when adding the item to the cache
What is the primary purpose of the CacheItemRemovedReason enumeration?
a. To specify the reason why a cache item was removed
b. To determine the priority of cache items
c. To handle cache item expiration
d. To configure cache item dependencies
Answer: a. To specify the reason why a cache item was removed
How can you use caching to improve the performance of a web application?
a. By storing frequently accessed data in the cache to reduce database queries and processing time
b. By increasing the size of web pages
c. By minimizing the use of server resources
d. By reducing the amount of data sent to clients
Answer: a. By storing frequently accessed data in the cache to reduce database queries and processing time
Which method allows you to specify a callback function when a cache item is removed?
a. Cache.Add with the CacheItemRemovedCallback delegate
b. Cache.Insert with the CacheItemRemovedCallback delegate
c. Cache.Put with the CacheItemRemovedCallback delegate
d. Cache.Update with the CacheItemRemovedCallback delegate
Answer: a. Cache.Add with the CacheItemRemovedCallback delegate
What is the difference between a cache hit and a cache miss?
a. A cache hit occurs when the requested data is found in the cache, while a cache miss occurs when it is not found
b. A cache miss occurs when the requested data is found in the cache, while a cache hit occurs when it is not found
c. A cache hit means the data was recently added, while a cache miss means it was recently removed
d. A cache miss occurs due to a network issue, while a cache hit means no issues
Answer: a. A cache hit occurs when the requested data is found in the cache, while a cache miss occurs when it is not found
How can you implement caching for frequently accessed web service data?
a. By using an in-memory cache or distributed cache to store responses
b. By caching data in a file system
c. By storing data in a database
d. By using server-side session state
Answer: a. By using an in-memory cache or distributed cache to store responses
What is the role of the CacheItemPriority enumeration?
a. To specify the priority of cached items when memory is low
b. To define the expiration time of cached items
c. To manage cache dependencies
d. To set cache item encryption settings
Answer: a. To specify the priority of cached items when memory is low
How does ASP.NET Core handle caching compared to traditional ASP.NET?
a. ASP.NET Core uses a unified caching API and supports various caching providers
b. ASP.NET Core does not support caching
c. ASP.NET Core only supports in-memory caching
d. ASP.NET Core requires external libraries for caching
Answer: a. ASP.NET Core uses a unified caching API and supports various caching providers
What caching technique is best suited for temporary data that changes frequently?
a. Sliding expiration
b. Absolute expiration
c. Distributed caching
d. In-memory caching
Answer: a. Sliding expiration
How do you configure a distributed cache in ASP.NET Core?
a. By using the AddDistributedMemoryCache, AddDistributedSqlServerCache, or similar methods in the Startup class
b. By setting up cache settings in the web.config file
c. By using the Cache class directly
d. By modifying cache configuration in appsettings.json
Answer: a. By using the AddDistributedMemoryCache, AddDistributedSqlServerCache, or similar methods in the Startup class
What is a benefit of using ResponseCache in ASP.NET Core?
a. It allows you to control caching of responses at the HTTP level
b. It stores data on the server side
c. It caches data in the client’s browser
d. It automatically handles cache dependencies
Answer: a. It allows you to control caching of responses at the HTTP level
How does the MemoryCache class handle cache item expiration?
a. It supports both absolute and sliding expiration policies
b. It only supports absolute expiration
c. It handles expiration based on cache size limits
d. It requires manual implementation of expiration logic
Answer: a. It supports both absolute and sliding expiration policies