JOBSEEKER?

A company is designing the class hierarchy for various cache implementations:

public class Cache {}

public class DiskCache : Cache {}

public class MemoryCache : Cache {}

public class OptimizedDiskCache : DiskCache {}

Select all the answers that will result in a runtime exception.

(Select all acceptable answers.)

OptimizedDiskCache optimizedDiskCache = new OptimizedDiskCache();
Cache cache = (Cache) optimizedDiskCache;
MemoryCache memoryCache = new MemoryCache();
Cache cache = (Cache) memoryCache;
DiskCache diskCache = (DiskCache) cache;
DiskCache diskCache = new DiskCache();
OptimizedDiskCache optimizedDiskCache = (OptimizedDiskCache) diskCache;
OptimizedDiskCache optimizedDiskCache = new OptimizedDiskCache();
DiskCache diskCache = (DiskCache) optimizedDiskCache;
Cache cache = new Cache();
MemoryCache memoryCache = (MemoryCache) cache;
OptimizedDiskCache optimizedDiskCache = new OptimizedDiskCache();
Cache cache = (Cache) optimizedDiskCache;
DiskCache diskCache = (DiskCache) cache;
   

Tags
C# Inheritance OOP New Public
Easy

3min

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