UGC NET CS 2018 Dec – II

Question 1

​Data warehouse contains___________ data that is never found in operational environment.

• Scripted
• Encoded
• Encrypted
• Summary

Question 2

Suppose a system has 12 instances of some resources with n processes competing for that resource. Each process may require 4 instances of the resource. The maximum value of n for which the system never enters into deadlock is

• 3
• 4
• 5
• 6

Question 3

​To overcome difficulties in Readers-Writers problem, which of the following statement/s is/are true ?

1. Writers are given exclusive access to shared objects
2. Readers are given exclusive access to shared objects
3. Both readers and writers are given exclusive access to shared objects.

Choose the correct answer from the code given below:

• 1 only
• Both 2 and 3
• 2 only
• 3 only

Question 4

Consider the following terminology and match List 1 and List 2 and choose the correct answer from the code given below b= branch factor d= depth of shallowest solution M= Maximum depth of the search tree I= depth limit

• (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
• (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
• (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
• (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

Question 5

​The third generation mobile phone are digital and based on

• AMPS
• Broadband CDMA
• CDMA
• D-AMPS

Question 6

Consider ISO-OSI network architecture reference model. Session layer of this model offer Dialog control, token management and ____________ as services.

• Synchronization
• Asynchronization
• Errors
• Flow control

Question 7

Consider the following two languages: L​₁​ = {x | for some y with | y| = 2^|x| , xy ∈ L and L is regular language} L₂​ = { x | for some y such that |x| = |y| , xy ∈ L and L is regular language} Which one of the following is correct?

• Both L​₁​ and L₂​ are regular languages
• Both L​₁​ and L₂​ are not regular languages
• Only L​₁​ is regular language
• Only L​₂ is regular language

Question 8

An internet service provider (ISP) has following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20 . The ISP want to give half of this chunk of addresses to organization A and a quarter to Organization B while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B ?

• 245.248.132.0/22 and 245.248.132.0/21
• 245.248.136.0/21 and 245.248.128.0/22
• 245.248.136.0/24 and 245.248.132.0/21
• 245.248.128.0/21 and 245.248.128.0/22

Question 9

​The Software Requirement Specification(SRS) is said to be _________ if and only if no subset of individual requirements described in it conflict with each other.

• Correct
• Consistent
• Unambiguous
• Verifiable

Question 10

​Consider the vocabulary with only four propositions A,B,C and D. How many models are there for the following sentence ?

(⌐ A ∨​ ⌐B ∨​ ⌐C ∨​ ⌐ ​D) 

• 8
• 7
• 15
• 16