UGC NET CS 2018 Dec – II

Data Warehouse is a relational database that is designed for query and analysis rather than for transaction processing. It usually contains historical data derived from transaction data, but it can include data from other sources. The goal is to produce statistical results that may help in decision makings. Option (D) is correct.

Given, Number of resources (R) = 12 Max need for each resource (N) = 3 Since deadlock-free condition is:

R ≥ P(N − 1) + 1 

Where R is total number of resources, P is the number of processes, and N is the max need for each resource.

12 ≥ P(4 − 1) + 1
11 ≥ 3P
11/3 ≥ P
P ≤ 3.66 

(Take, floor value for maximum) Therefore, the largest value of P that will always avoid deadlock is 3. Option (A) is correct.

In Readers-Writers Problem, since readers do not modify values, so these can be allowed with other readers. But writers are given exclusive access to shared objects. Only statement (1) is correct.

BFS → O(b^d) worst case space complexity DFS → O(bm) worst case space complexity Depth - Limited Search → O(bl) Iterative deepening Search → O(bd) Option (B) is correct.

First generation supports AMPS. Second generation supports D-AMPS and CDMA. Third generation of wireless communication technology, it supports broadband voice, data and multimedia communication technologies in wireless networks. Refer - https://en.wikipedia.org/wiki/Mobile_technology#Mobile_communication_industry[2] Option (B) is correct.

Functions of Session Layer : Dialog Control, Managing Tokens, Synchronization. Flow control and error corrections are managed at Transport layer. Option (B) is correct.

See Question 4 of https://www.geeksforgeeks.org/computer-networks-set-1/ Option (B) is correct.

• SRS is said to be correct if it covers all the requirements that are actually expected from the system.
• Requirements in SRS are said to be consistent if there are no conflicts between any set of requirements. Examples of conflict include differences in terminologies used at separate places, logical conflicts like time period of report generation, etc.
• An SRS is said to be unambiguous if all the requirements stated have only 1 interpretation.
• An SRS is verifiable if there exists a specific technique to quantifiably measure the extent to which every requirement is met by the system.

Option (B) is correct.

There are four variables A, B, C, D. Therefore 2^4 = 16. From 0 to 15 models are exist, but one is 0, so 15 is correct answer.