Today's quiz questions

These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.

1. 1.What is a race condition?

   • •A bug where the system's behavior depends on the unpredictable timing of multiple concurrent operations
   • •A database error when two queries target the same row
   • •A performance issue where two processes compete for CPU resources
   • •A testing scenario where two tests run simultaneously

2. 2.What is the reactor pattern?

   • •The underlying pattern of React.js components
   • •A pattern where components react to configuration changes
   • •An event-driven pattern that demultiplexes and dispatches incoming I/O events to registered handlers using a single-threaded event loop
   • •A nuclear physics simulation pattern

3. 3.What is type erasure in Java generics?

   • •A technique that automatically converts between types
   • •A way to delete type definitions from Java bytecode for security
   • •The compiler removes generic type information at compile time, replacing type parameters with their bounds or Object
   • •A process that removes unused type declarations during compilation

4. 4.What is the CAP theorem?

   • •A theorem about CPU, Allocation, and Processing speed tradeoffs
   • •A database design principle for Caching, Aggregation, and Partitioning
   • •At most two of Consistency, Availability, and Partition tolerance can be guaranteed
   • •A security model for Cloud, Access, and Privacy

5. 5.What is the visitor pattern?

   • •A web analytics pattern for monitoring traffic
   • •A pattern where objects visit a central registry before execution
   • •A pattern for tracking user visits to web pages
   • •A behavioral pattern that lets you add new operations to objects without modifying their classes by separating algorithm from object structure

6. 6.What is the Byzantine Generals Problem?

   • •A distributed computing problem about reaching consensus when some participants may be malicious or faulty
   • •A network routing problem with unreliable nodes
   • •A database consistency problem involving multiple write conflicts
   • •A military strategy problem about coordinating attacks from multiple directions

7. 7.What is a microservices architecture?

   • •A technique for running multiple programs on a single server
   • •A way to compress code to make programs smaller
   • •A design pattern for creating lightweight user interfaces
   • •An approach where an application is built as a collection of small, independently deployable services

8. 8.What is tail call optimization (TCO)?

   • •An algorithm optimization that processes the tail of an array first
   • •An optimization that removes the last function call for performance
   • •A compiler optimization that reuses the current stack frame for tail calls
   • •A technique for optimizing the last element in a linked list

9. 9.What is the difference between stack and heap memory?

   • •Stack is for large data; heap is for small data
   • •Stack stores local variables with LIFO order and automatic management; heap stores dynamically allocated objects
   • •Stack is for functions; heap is for variables
   • •Stack is permanent storage; heap is temporary

10. 10.What is the difference between strong and weak typing?

    • •Strong typing is for compiled languages; weak typing is for interpreted languages
    • •Strong typing enforces type rules strictly (Python, Java); weak typing allows implicit type coercion (JavaScript, C)
    • •Strong typing requires type annotations; weak typing doesn't
    • •Strong typing is faster; weak typing is slower