Computer Science Paper II Past Paper 2020

The Computer Science Paper II Past Paper 2020 covers systems, networks and images. Q.2 covers Moore’s law, interrupts and instruction-level parallelism. Q.3 covers kernels, paging and deadlocks. Q.4 covers IPv4 against IPv6, subnets and file systems. Q.5 covers signal encoding, ARP and RARP, and multiplexing. Q.6 covers SQL joins, ER diagrams and two-phase locking. Q.7 covers histogram equalization, color models and image storage. Q.8 closes with web engineering challenges, validation and requirements. This file holds the Part-II sheet only.

What this paper contains

  • This file carries Part-II (the descriptive part) of the paper.
  • Part-II — attempt ONLY FOUR questions, TWO from EACH of two sections; each question carries 20 marks (Part-I holds the 20 MCQs, per the printed header)

Part-II questions

SECTION-A

Q.2 — (a) Explain Moore’s law. List high computing requirements in contemporary computing. (7)
(b) List and briefly define two approaches to dealing with multiple interrupts. (6)
(c) What is instruction-level parallelism? What are some typical distinguishing characteristics of RISC organization? (7) (20)

Q.3 — (a) What is the kernel of an operating system? Explain the difference between a monolithic and microkernel. (7)
(b) What is the difference between simple and virtual memory paging? Also explain the purpose of translation lookaside buffer. (6)
(c) Why do we have deadlock in the multiprocessing environment? Explain different techniques for dealing with deadlocks. (7) (20)

Q.4 — (a) Compare IPv4 and IPv6 headers. Explain the use of NAT technology to overcome IPv4 scarcity. (8)
(b) Find the maximum number of valid subnets and usable hosts per subnet that you can get from the network 172.23.0.0/23. (6)
(c) List and briefly define any THREE file organization techniques. Also explain basic Linux file system security. (6) (20)

Q.5 — (a) What is signal encoding? Explain different encoding techniques used in data communication. (8)
(b) Explain the functions and needs of ARP and RARP protocols in computer networks. (5)
(c) Explain multiplexing and demultiplexing at the transport layer. Explain in the context of TCP/IP protocol. (7) (20)

SECTION-B

Q.6 — (a) What is the purpose of a join in SQL? Explain inner, left, right and full join with the help of examples. (8)
(b) Construct an E-R diagram for a hospital with a set of patients and a set of medical doctors. Associate with each patient a log of the various tests and examinations conducted. (7)
(c) Explain Two-phase locking (2PL) as a concurrency control mechanism in the database systems. (5) (20)

Q.7 — (a) What is Histogram equalization? Explain the process and discuss its uses. (6)
(b) Explain types of color models. Also discuss the most common hardware oriented color models in detail. (8)
(c) What is translation and scaling? Find the number of bits required to store a 256×256 image with 32 gray levels. (6) (20)

Q.8 — (a) “Web engineering is more challenging than traditional software engineering”. Argue for or against. (7)
(b) Briefly discuss the role of validation and verification in requirement engineering. (6)
(c) Explain functional and non-functional requirements in the context of a web application development. (7) (20)

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