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Computer Knowledge - MCQ Practice Questions

Practice free Computer Knowledge multiple-choice questions with detailed answers and explanations. Perfect for competitive exam preparation.

309 questions | 100% Free

Q.21Easy

What does ACID stand for in database transactions?

Q.22Easy

In SQL, which JOIN returns only matching records from both tables?

Q.23Medium

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

Q.24Easy

What is the time complexity of searching in a balanced binary search tree?

Q.25Easy

In cloud computing, what does IaaS stand for?

Q.26Medium

Which normalization form eliminates transitive dependencies?

Q.27Medium

What is the primary purpose of database replication in distributed systems?

Q.28Easy

In cybersecurity, what is the primary purpose of a firewall?

Q.29Medium

Which algorithm is commonly used for sorting in most programming language standard libraries?

Q.30Hard

What does CAP theorem state in distributed systems?

Q.31Medium

In machine learning basics, what is overfitting?

Q.32Medium

Which of the following is a characteristic of NoSQL databases?

Q.33Medium

What is the purpose of database sharding?

Q.34Medium

In AI/ML, what does a neural network's activation function do?

Q.35Medium

Which of the following best describes microservices architecture?

Q.36Medium

What is the purpose of connection pooling in database management?

Q.37Hard

In cybersecurity, what is a zero-day vulnerability?

Q.38Medium

Which sorting algorithm is most efficient for nearly sorted data?

Q.39Hard

What does BASE model in NoSQL stand for?

Q.40Medium

In cloud security, what is the principle of least privilege?