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Latest NVS PGT Computer Science Exam Question (Objective Questions), MCQ in English

Subjects : Computer Science

Question Bank NVS PGT Computer Science Tier-II Exam - English
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Computer Science

Question 1Single Answer
The postfix expression AB + CD − can be evaluated using a
  1. A
    stack
  2. B
    tree
  3. C
    queue
  4. D
    linked list
Question 2Single Answer
The post order traversal of a binary tree is DEBFCA. Find out the pre-order traversal .
  1. A
    ABFCDE
  2. B
    ADBFEC
  3. C
    ABDECF
  4. D
    None of the above
Question 3Single Answer
The branch logic that provides making capabilities in the control unit is known as
  1. A
    Controlled transfer
  2. B
    Conditional transfer
  3. C
    Unconditional transfer
  4. D
    None of the above
Question 4Single Answer
The number of colour required to properly colour the vertices of every planer graph is
  1. A
    2
  2. B
    3
  3. C
    4
  4. D
    5
Question 5Single Answer
In multiuser database if two users wish update the same record at the same time, they are prevented from doing so by
  1. A
    Jamming
  2. B
    Password
  3. C
    Documentation
  4. D
    Record lock
Question 6Single Answer
A binary search tree is a binary tree :
  1. A
    All items in the left subtree are less than root
  2. B
    All items in the right subtree greater than or equal to the root
  3. C
    Each subtree is itself a binary search tree
  4. D
    All of the above
Question 7Single Answer
What deletes the entire file except the file structure ?
  1. A
    ERASE
  2. B
    DELETE
  3. C
    ZAP
  4. D
    PACK
Question 8Single Answer
Which command is the fastest among the following ?
  1. A
    COPY TO < NEW FILE >
  2. B
    COPY STRUCTURE TO < NEW FILE >
  3. C
    COPY FILE < FILE 1> < FILE 2 >
  4. D
    COPY TO MFILE-DAT DELIMITED
Question 9Single Answer
B+ tree are preferred to binary tree in Database because ?
  1. A
    Disk capacity are greater than memory
  2. B
    Disk access is much slower than memory access
  3. C
    Disk data transfer rates are much less than memory data transfer rate
  4. D
    Disks are more reliable than memory
Question 10Single Answer
A Transaction Manager is which of the following ?
  1. A
    maintains a log of transactions
  2. B
    Maintains before and after database images
  3. C
    maintains appropriate concurrency control
  4. D
    All of the above
Question 11Single Answer
Leaves of which of the following trees are at the sam level ?
  1. A
    Binary tree
  2. B
    B-tree
  3. C
    AVL-tree
  4. D
    Expression tree
Question 12Single Answer
Which of the following TCP/IP Internet protocol is diskless machine uses to obtain its IP address from a server ?
  1. A
    RAP
  2. B
    RIP
  3. C
    ARP
  4. D
    X.25
Question 13Single Answer
Decryption and encryption of data are the responsibility of which of the following later ?
  1. A
    Physical layer
  2. B
    Data Link layer
  3. C
    Presentation layer
  4. D
    Session layer
Question 14Single Answer
In which circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM ?
  1. A
    Space division
  2. B
    Time division
  3. C
    Virtual
  4. D
    Packet
Question 15Single Answer
In which Routing Method do all the routers have a common database ?
  1. A
    Distance vector
  2. B
    Link state
  3. C
    Link vector
  4. D
    Dijkestra method
Question 16Single Answer
Page Shift Keying (PSK) Method is used to modulate digital signal at 9600 bps using 16 level. Find the line signals and speed (i.e. modulation rate) .
  1. A
    2400 bauds
  2. B
    1200 bauds
  3. C
    4800 bauds
  4. D
    9600 bauds
Question 17Single Answer
The station to hub distance in which it is 2000 metres .
  1. A
    100 Base - Tx
  2. B
    100 Base-Fx
  3. C
    100 Base-T4
  4. D
    100 Base-T1
Question 18Single Answer
Main aim of software engineering is to produce
  1. A
    program
  2. B
    software
  3. C
    within budget
  4. D
    software within budget in the given schedule
Question 19Single Answer
Key process area of CMM level 4 are also clasified by a process which is
  1. A
    CMM level 2
  2. B
    CMM level 3
  3. C
    CMM level 5
  4. D
    All of the above
Question 20Single Answer
Validation means -
  1. A
    are we bulding the product right
  2. B
    are we building the right product
  3. C
    Verification of fields
  4. D
    None of the above
Question 21Single Answer
If a process is under statistical control, then it is
  1. A
    Maintainable
  2. B
    Measurable
  3. C
    Predictable
  4. D
    Verifiable
Question 22Single Answer
In a function oriented design, we
  1. A
    minimize cohesion and maximize coupling
  2. B
    maximize cohesion and minimize coupling
  3. C
    maximize cohesion and maximize coupling
  4. D
    minimize cohesion and minimize coupling
Question 23Single Answer
Which of the following metric does not depend on the programming language used ?
  1. A
    Line of code
  2. B
    Function count
  3. C
    Member of token
  4. D
    All of the above
Question 24Single Answer
A/B+ tree index is to be built on the name atribute of the relation STUDENT. Asume that all students names are of length 8 bytes, disk block are of size 512 bytes and index pointers are of size 4 bytes. Given the scenario what would be the best choice of the degree (i.e. the number of pointers per node) of the B+ tree ?
  1. A
    16
  2. B
    42
  3. C
    43
  4. D
    44
Question 25Single Answer
The inorder traversal of the tree will yield a sorted listing of elements of tree in
  1. A
    Binary tree
  2. B
    Binary search tree
  3. C
    Heaps
  4. D
    None of the above
Question 26Single Answer
Mobile IP provides two basic functions .
  1. A
    Route discovery and registration
  2. B
    Agent discovery and registration
  3. C
    IP binding and registration
  4. D
    None of the above
Question 27Single Answer
Pre-emptive scheduling is the strategy of temporarily suspending a gunning process
  1. A
    before the CPU time slice expires
  2. B
    to allow starving processes to run
  3. C
    when it requests I/O
  4. D
    to avoid collision
Question 28Single Answer
In round robin CPU scheduling as time quantum is increased the average turn around time
  1. A
    increases
  2. B
    decreases
  3. C
    remains constant
  4. D
    varies irregularly
Question 29Single Answer
Resources are allocated to the process on nonsharable basis is
  1. A
    mutual exclusion
  2. B
    hold and wait
  3. C
    no pre-emption
  4. D
    circular wait
Question 30Single Answer
Cached and interleaved memories are ways of speeding up memory access between CPU's and slower RAM. Which memory models are best suited (i.e. improves the performance most) for which programs ?
(i) Cached memory is best suited for small loops
(ii) Inteleaved memory is best suited for small loops
(iii) Interleaved memory is best suited for large sequential
(iv) Cached memory is best suited for large sequential
code :
  1. A
    (i) and (ii) are true
  2. B
    (i) and (iii) are true
  3. C
    (iv) and (ii) are true
  4. D
    (iv) and (iii) are true
Question 31Single Answer
Consider the following page trace :
4, 3, 2, 1, 4, 3, 5, 4, 3, 2, 1, 5
Percentage of page fault that would occur if FIFO page replacement algorithm is used with number of frames for the JOB m = 4 will be
  1. A
    8
  2. B
    9
  3. C
    10
  4. D
    12
Question 32Single Answer
Check sum used along with each packet computes the sum of the data, where data is treated as a sequence of
  1. A
    Integer
  2. B
    Character
  3. C
    Real numbers
  4. D
    Bits
Question 33Single Answer
If an integer needs two bytes of storage, then the maximum value of a signed integer is
  1. A
    216 − 1
  2. B
    215 − 1
  3. C
    216
  4. D
    215
Question 34Single Answer
Which of the following logic families is well suited for high-speed operations ?
  1. A
    TTL
  2. B
    ECL
  3. C
    MOS
  4. D
    CMOS
Question 35Single Answer
Interrupts which are initiated by an instruction are
  1. A
    Interrupts
  2. B
    External
  3. C
    Hardware
  4. D
    Software
Question 36Single Answer
printf (" %c", 100) ;
  1. A
    prints 100
  2. B
    prints ASCII equivalent of 100
  3. C
    prints garbage
  4. D
    None of the above
Question 37Single Answer
For the transmission of the signal, Bluetooth wireless technology uses
  1. A
    time division multiplexing
  2. B
    frequency division multiplexing
  3. C
    time division duplex
  4. D
    frequency division duplex
Question 38Single Answer
Consider the following statements :
I. Recursive languages are closed under complementation
II. Recursively enumerable languages are closed under union
III. Recursively enumerable languages are closed under complementation
Which of the above statements are true ?
  1. A
    I only
  2. B
    I and II
  3. C
    I and III
  4. D
    II and III
Question 39Single Answer
What is the routing algorithm used by RIP and IGRP ?
  1. A
    OSPF
  2. B
    Link-state
  3. C
    Dynamic
  4. D
    Dijkestra vector
Question 40Single Answer
Identify the incorrect statement :
  1. A
    The overall strategy drives the E-commerce data warehousing strategy
  2. B
    Data warehousing in an E-Commerce environment should be done in a classical manner
  3. C
    E-commerce opens up an entirely new world of web server
  4. D
    E-Commerce security threats can be grouped into three major categories
Question 41Single Answer
Reliability of software is directly dependent on
  1. A
    quality of the design
  2. B
    number of errors present
  3. C
    software engineering experience
  4. D
    user requirement
Question 42Single Answer
_________is not an E-commerce application .
  1. A
    House banking
  2. B
    Buying stocks
  3. C
    Conducting an auction
  4. D
    Evaluating an employee
Question 43Single Answer
______ is a satellite based tracking system that enables the determination of person's position .
  1. A
    Bluetooth
  2. B
    WAP
  3. C
    Short Message Service
  4. D
    Global Positioning system
Question 44Single Answer
A complete microcomputer system consists of
  1. A
    Microprocessor
  2. B
    Memory
  3. C
    Peripheral equipment
  4. D
    All of the above
Question 45Single Answer
Where does a computer add and compare data ?
  1. A
    Hard disk
  2. B
    Floppy disk
  3. C
    CPU chip
  4. D
    Memory chip
Question 46Single Answer
Pipelining strategy is called implement
  1. A
    instruction execution
  2. B
    instruction prefetch
  3. C
    instruction decoding
  4. D
    instruction manipulation
Question 47Single Answer
Which of the following data structure is linear type ?
  1. A
    Strings
  2. B
    Lists
  3. C
    Queues
  4. D
    All of the above
Question 48Single Answer
To reresent hierarchical relationship between elements, which data structure is suitable ?
  1. A
    Dequeue
  2. B
    priority
  3. C
    Tree
  4. D
    All of the above
Question 49Single Answer
Consider the following pseudocode segment :
K : = 0
       for   i1 : = 1 to n
            for i2 : = 1 to i1
              :
              :
              :
                     for im : = 1 to im − 1
                                    K : = K + 1
The value of K after the execution of this code shall be
  1. A
    C (n + m – 1, m)
  2. B
    C (n – m + 1, m)     
  3. C
    C (n + m – 1, n)
  4. D
    C (n – m + 1, n)        
Question 50Single Answer
In Delta Rule for error minimization
  1. A
    weights are adjusted w.r.to change in the output
  2. B
    weights are adjusted w.r.to difference between desired output and actual output
  3. C
    weights are adjusted w.r.to difference between input and output
  4. D
    none of the above
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