Computer Science Study Materials for Competitive Exams

Sample Questions, Previous Year Solved Papers, Study Materials For Competitive Examinations Like UGC NET, SET And GATE Computer Science.

Tuesday, 14 May 2019

NTA UGC NET Computer Science Paper II December 2018 - Part 4

61.       Match the following Secret Key Algorithms (List I) with Corresponding Key Lengths (List II) and choose the correct answer from the code given below:
List I                   List II
(a) Blowfish      (i) 128 – 256 bits
(b) DES             (ii) 128 bits
(c) IDEA             (iii) 1 - 448 bits
(d) RC5              (iv) 56 bits
Code:
(1) (a)–(iv), (b)-(iii), (c)-(ii) , d-(i)
(2) (a)–(iii), (b)-(iv), (c)-(i) , d-(ii)
(3) (a)–(iii), (b)-(iv), (c)-(ii) , d-(i)
(4) (a)–(ii), (b)-(iii), (c)-(iv) , d-(i)
Answer: 3
62.       The four byte IP address consists of
(1) Network Address
(2) Host Address
(3) Both Network and Host Addresses
(4) Neither Network nor Host Addresses
Answer: 3
63.       Consider ISO-OSI network architecture reference model. Session layer of this model offers dialog control, token management and .................. as services.
(1) Synchronization
(2) Asynchronization
(3) Flow control
(4) Errors
Answer: 1
64.       Suppose a cloud contains software stack such as Operating systems, Application softwares, etc. This model is referred as ............ model.
(1) SaaS
(2) PaaS
(3) IaaS
(4) MaaS
Answer: 1
65.       The Third Generation mobile phones are digital and based on
(1) AMPS
(2) D-AMPS
(3) CDMA
(4) Broadband CDMA
Answer: 4
66.       Which of the following statement/s is/are true?
(i) Firewalls can screen traffic going into or out of an organization.
(ii) Virtual private networks can stimulate an old leased network to provide certain desirable properties.
Choose the correct answer from the code given below:
Code:
(1) (i) only
(2) (ii) only
(3) Both (i) and (ii)
(4) Neither (i) nor (ii)
Answer: 3
67.       Which of the following statements/s is/are true?
(i) Windows XP supports both peer-peer and client-server networks.
(ii) Windows XP implements Transport protocols as drivers that can be loaded and unloaded from the system dynamically
Choose the correct answer from the code given below:
Code:
(1) (i) only
(2) (ii) only
(3) Neither (i) nor (ii)
(4) Both (i) and (ii)
Answer: 4
68.       In Linux operating system environment ............... command is used to print a file.
(1) print
(2) ptr
(3) pr
(4) lpr
Answer: 4
69.       To overcome difficulties in Readers-Writers problem, which of the following statement/s is/are true?
(i) Writers are given exclusive access to shared objects
(ii) Readers are given exclusive access to shared objects
(iii) Both Readers and Writers are given exclusive access to shared objects
Choose the correct answer from the code given below:
Code:
(1) (i) only
(2) (ii) only
(3) (iii) only
(4) Both (ii) and (iii)
Answer: 1
70.    Suppose a system has 12 instances of some resource 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
(1) 3
(2) 4
(3) 5
(4) 6
Answer: 1
71.    Dirty bit is used to show the
(1) wrong page
(2) page with corrupted data
(3) page with low frequency occurrence
(4) page that is modified after being loaded into cache memory
Answer: 4
72.    Suppose for a process P, reference to pages in order are 1,2,4,5,2,1,2,4. Assume that main memory can accommodate 3 pages and the main memory has already 1 and 2 in the order 1 – first, 2 – second. At this moment, assume FIFO Page Replacement Algorithm is used then the number of page faults that occur to complete the execution of process P is
(1) 4
(2) 3
(3) 5
(4) 6
Answer: 3
73.    Consider the following set of processes and the length of CPU burst time given in milliseconds:
Assume that processes being scheduled with Round-Robin Scheduling Algorithm with time quantum 4 ms. The the waiting time for P4 is .............. ms.
(1) 0
(2) 4
(3) 12
(4) 6
Answer: 3
74.    Suppose P, Q and R are co-operating processes satisfying Mutual Exclusion condition. Then, if the process Q is executing in its critical section then
(1) Both ‘P’ and ‘R’ execute in critical section
(2) Neither ‘P’ nor ‘R’ executes in their critical section
(3) ‘P’ executes in critical section
(4) ‘R’ executes in critical section
Answer: 2
75.    A process residing in Main Memory and Ready and Waiting for execution, is kept on
(1) Execution Queue
(2) Job Queue
(3) Ready Queue
(4) Wait Queue
Answer: 3
76.    .............. system call creates new process in Unix.
(1) create
(2) create new
(3) fork
(4) fork new
Answer: 3
77.    An attribute A of datatype varchar(20) has the value ‘xyz’, and the attribute B of datatype char(20) has the value “lmnop”, then the attribute A has ............... spaces and attribute B has ............... spaces.
(1) 3,5
(2) 20,20
(3) 3,20
(4) 20,5
Answer: 3
78.    Data warehouse contains ............... data that is never found in operational environment.
(1) Summary
(2) Encoded
(3) Encrypted
(4) Scripted
Answer: 1
79.    .................. command is used to remove a relation from SQL database.
(1) Drop table
(2) Delete table
(3) Remove table
(4) Update table
Answer: 1
80.    Which of the following statement/s is/are true?
(i) Facebook has the world’s largest Hadoop Cluster.
(ii) Hadoop 2.0 allows live stream processing of Real time data.
Choose the correct answer from the code given below:
Code:
(1) (i) only
(2) (ii) only
(3) Both (i) and (ii)
(4) Neither (i) nor (ii)
Answer: 3

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