BCS Study Guide 2026
Everything you need to pass the BCS exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 BCS Exam Format at a Glance
📚 BCS Topics to Study (21)
✍️ Sample BCS Questions & Answers
1. How many ways can 5 distinct books be arranged on a shelf?
The number of permutations of 5 distinct objects is 5! = 5×4×3×2×1 = 120.
2. Dynamic programming is best used when a problem exhibits which two properties?
Dynamic programming applies when a problem has overlapping subproblems (same sub-calculations repeated) and optimal substructure (optimal solution built from optimal sub-solutions).
3. Which protocol operates at the Network layer and is used to report error conditions?
ICMP (Internet Control Message Protocol) operates at the Network layer and is used to send error messages and operational information, as used by the ping command.
4. What is the cardinality of the power set of a set with 4 elements?
The power set of a set with n elements has 2^n subsets; for n=4, that is 2^4 = 16.
5. What is a foreign key constraint?
A foreign key is a column in one table that refers to the primary key in another table, ensuring referential integrity between related tables.
6. Which page replacement algorithm suffers from Belady's Anomaly?
FIFO can suffer from Belady's Anomaly, where increasing the number of page frames counterintuitively increases the number of page faults.