Club Coding Quiz - MCA

1. Which of the following best describes an idempotent HTTP method?

• A. It can only be called once
• B. It modifies server state on each call
• C. It gives the same result no matter how many times it’s called
• D. It always returns status code 200

2. What does event loop do in Node.js?

• A. It executes all functions sequentially
• B. It blocks the thread while waiting for I/O
• C. It manages asynchronous callbacks and non-blocking I/O
• D. It prevents functions from executing in parallel

3. Which data structure is best for implementing a LRU (Least Recently Used) cache?

• A. Stack
• B. Queue
• C. HashMap + Doubly Linked List
• D. Binary Search Tree

4. What does ACID stand for in database systems?

• A. Atomicity, Consistency, Isolation, Durability
• B. Access, Commit, Indexing, Durability
• C. Algorithm, Column, Insert, Delete
• D. Asynchronous, Cache, Inherit, Drop

5. What is the main difference between == and === in JavaScript?

• A. == checks type and value, === checks only value
• B. === checks type and value, == allows type coercion
• C. No difference
• D. == is faster

6. Which sorting algorithm is best for nearly-sorted arrays?

• A. Merge Sort
• B. Bubble Sort
• C. Insertion Sort
• D. Quick Sort

7. In RESTful APIs, what status code means “Resource created successfully”?

• A. 200
• B. 201
• C. 204
• D. 302

8. What will be the output of the following Python code? x = [1, 2, 3] y = x y.append(4) print(x)

• A. [1, 2, 3]
• B. [1, 2, 3, 4]
• C. Error: Cannot modify list
• D. None

9. What is the time complexity of binary search in a sorted array?

• A. O(n)
• B. O(log n)
• C. O(n log n)
• D. O(1)

10. What does docker run -it ubuntu bash do?

• A. Installs Ubuntu on your system
• B. Runs Ubuntu in the background
• C. Starts an interactive Ubuntu container with a bash shell
• D. Builds a Dockerfile named bash