B CompE Bachelor of Computer Engineering Cheat Sheet 2026

The 30 highest-yield B CompE Bachelor of Computer Engineering facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the output of calling a virtual method through a base class pointer pointing to a derived object in C++? → Derived class version is called
2. Which layer of the OSI model is responsible for end-to-end communication and error recovery? → Transport Layer
3. In a full adder, how many inputs does it have? → 3
4. What is the IPv6 equivalent of an IPv4 broadcast address? → IPv6 does not support broadcast
5. According to the Nyquist sampling theorem, a band-limited signal with maximum frequency f_max must be sampled at a minimum rate of: → 2 × f_max
6. When a parent process terminates, all child processes also end, which is known as cascading termination. → Normally or abnormally
7. Which cache write policy writes data to both the cache and main memory simultaneously on every write hit? → Write-through
8. In virtual memory systems, what structure maps virtual page numbers to physical frame numbers? → Page table
9. How long does it take to insert at the end of a dynamic array? → Either O(1) or O(n)
10. How many words can an 8-bit CPU process? → 8-bits – 64 bits
11. Which type of network topology connects every node directly to every other node? → Mesh
12. Regarding polymorphism, which of the following is false? → Increases overhead of function definition always
13. What kind of computer architecture is the following? → All of the above
14. Which Boolean expression represents De Morgan's first theorem? → (A·B)' = A'+B'
15. Which function is used to release memory allocated by `malloc`? → free
16. What is the purpose of a database view? → Provide a virtual table based on the result of a stored query
17. What exactly is an operating system? → All of the above
18. The processor is considered to have _____ if an exception is thrown and the subsequent instructions are fully executed. → Imprecise exceptions
19. Which of the following is not an operating system that runs in real time? → Palm OS
20. Which programming language was the first to focus solely on objects? → SmallTalk
21. Interrupt latency for real-time operating systems should be → minimal
22. How can an array be initialized in C? → int arr[3] = {1,2,3};
23. What is the primary advantage of register windowing, as used in SPARC processors? → Speeds up procedure calls by avoiding expensive register saves to memory
24. In the context of microprocessor reset, what is the state of the program counter immediately after a cold reset on most RISC processors? → It is loaded from a fixed reset vector address defined by the architecture
25. When a process is waiting for an I/O service and is in the "Blocked" state. → Ready state
26. What technique does an OS use to allow a program larger than physical RAM to run by keeping only active portions in memory? → Demand paging
27. What is the primary function of the ARP protocol? → Resolve IP addresses to MAC addresses
28. What is the Boolean identity of A + A'? → 1
29. What type of database model does MongoDB use? → Document-oriented
30. Which SQL command removes all rows from a table without deleting the table structure? → TRUNCATE