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Download JNU 2019 Computer And System Science Question Paper

Download JNU 2019 Computer And System Science Previous Question Paper || Jawaharlal Nehru University (JNU) Last 10 Years Question Paper

This post was last modified on 21 January 2021

JNU Last 10 Years 2011-2021 Previous Question Papers with Answers


Question Paper Name: Computer and system science 29th May 2019 Shift 1 Set1

Subject Name: Computer and system science

Creation Date: 2019-05-29 14:10:43

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Duration: 180

Total Marks: 100

Display Marks: Yes

Share Answer Key With Delivery Engine: Yes

Actual Answer Key: Yes

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Computer and system science

Group Number : 1

Group Id : 128206159

Group Maximum Duration : 0

Group Minimum Duration : 120

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Revisit allowed for view?: No

Revisit allowed for edit? : No

Break time: 0

Group Marks: 100

PART A

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Section Id :

Section Number : 1

Section type : Online

Mandatory or Optional: Mandatory

Number of Questions: 75

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Number of Questions to be attempted: 75

Section Marks: 100

Display Number Panel: Yes

Group All Questions: No

Sub-Section Number: 1

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Sub-Section Id: 128206406

Question Shuffling Allowed : Yes

Question Number: 1 Question Id : 1282069033 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Consider a B+ tree in which the maximum number of keys in a node is 5.

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What is the minimum number of keys in a non-root node?

(a) 1

(b) 2

(c) 3

(d) 4

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Question Number : 2 Question Id : 1282069034 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Which of the following sorting algorithm has the lowest worst case complexity?

(a) Merge sort

(b) Bubble sort

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(c) Quick Short

(d) Selection Sort

Options:

12820635735. A

12820635736. B

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12820635737. C

12820635738. D

Question Number : 3 Question Id : 1282069035 Question Type : MCQ Option Shuffling : No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

The postfix expression for the infix expression A+ B*(C+D)/F+D* E is

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(a) AB + CD +*F/D+E*

(b) ABCD + *F/ + DE* +

(c) A*B + CD / F*DE ++

(d) A+*BCD/F*DE ++

Options:

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12820635739. A

12820635740. B

12820635741. C

12820635742. D

Question Number : 4 Question Id : 1282069036 Question Type : MCQ Option Shuffling : No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks: 1 Wrong Marks : 0

Consider the process of inserting an element into a Max Heap, where the Max Heap is represented by an array. Suppose, we perform binary search on the path from the new leaf to the root for finding the position of newly inserted element, the number of comparisons performed is

(a) O(log2 n)

(b) O(log2 log2 n)

(c) O(n)

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(d) O(n log2 n)

Options:

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Question Number: 5 Question Id : 1282069037 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

The following program

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main ()

{ printf("%u", main);}

is

(a) printing a garbage number

(b) giving an execution error

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(c) printing of starting address of the main function

(d) having an infinite loop

Options:

12820635747. A

12820635748. B

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12820635749. C

12820635750. D

Question Number : 6 Question Id : 1282069038 Question Type : MCQ Option Shuffling: No Display Question Number: Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Consider the following program fragment

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int v =3, *pv =&v;

printf("%d %d", v, *pv);

The output will be

(a) an error message

(b) 3, address of v

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(c) 3,3

(d) None of above

Options:

12820635751. A

12820635752. B

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12820635753. C

12820635754. D

Question Number : 7 Question Id : 1282069039 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks: 1 Wrong Marks : 0

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Consider the following program fragment

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int a=5, *b = &a;

printf("%d", a * b);

The output is:

(a) 25

(b) garbage

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(c) 5 x address of b

(d) an error message

Options:

12820635755. A

12820635756. B

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12820635757. C

12820635758. D

Question Number : 8 Question Id : 1282069040 Question Type : MCQ Option Shuffling: No Display Question Number: Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

The operation of a staircase switch best explains the

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(a) or operation

(b) and operation

(c) exclusive nor operation

(d) exclusive or operation

Options:

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12820635759. A

12820635760. B

12820635761. C

12820635762. D

Question Number: 9 Question Id : 1282069041 Question Type: MCQ Option Shuffling: No Display Question Number: Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks : 1 Wrong Marks : 0

The only state transition that is initiated by the user process itself is

(a) block

(b) dispatch

(c) wakeup

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(d) None of the above

Options:

12820635763. A

12820635764. B

12820635765. C

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12820635766. D

Question Number: 10 Question Id : 1282069042 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation: Vertical

Correct Marks : 1 Wrong Marks : 0

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What is the correct matching for the following pairs?

(A) Disk Scheduling (I) Round robin

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(B) Batch Processing (II) SCAN

(C) Time sharing (III) LIFO

(D) Interrupt Processing (IV) FIFO

(a) A-III, B-IV, C-II, and D-I

(b) A-IV, B-III, C-II, and D-I

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(c) A-II, B-IV, C-I, and D-III

(d) A-II, B-I, C-IV, and D-III

Options:

12820635767. A

12820635768. B

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12820635769. C

12820635770. D

Question Number : 11 Question Id : 1282069043 Question Type : MCQ Option Shuffling : No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

A system has 3 processes and is sharing 4 resources. If each process needs a maximum of 2 units then, deadlock

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(a) can never occur

(b) may occur

(c) has to occur

(d) all of the above

Options:

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12820635771. A

12820635772. B

12820635773. C

12820635774. D

Question Number : 12 Question Id : 1282069044 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks : 1 Wrong Marks : 0

A process refers to 5 pages, A, B, C, D and E in the order A?B?C?D?A?B?E?A?B?C?D?E. If the page replacement algorithm is FIFO, the number of pages transfers with an empty internal store of 3 frames are:

(a) 8

(b) 10

(c) 9

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(d) 7

Options:

12820635775. A

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Question Number: 13 Question Id : 1282069045 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

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In an entity relationship, y is the dominant entity and x is the subordinate entity. Which of the following is a correct statement?

(a) Operationally, if y is deleted, so is x

(b) Operationally, if x is deleted, so is y

(c) Operationally, if x is deleted, y remains the same

(d) x is existence dependent on y

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Options:

12820635779. A

12820635780. B

12820635781. C

12820635782. D

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Question Number : 14 Question Id : 1282069046 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Given the functional dependencies

X?W; X?Y; X?Z; Z ? PQ

Which of the following does not hold?

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(a) X?Z

(b) X?WY

(c) W?Z

(d) None of the above

Options:

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12820635783. A

12820635784. B

12820635785. C

12820635786. D

Question Number: 15 Question Id : 1282069047 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks: 1 Wrong Marks : 0

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Case Pradipatas and P is the relational algebra expression, then which of the following equivalences are not

(a) s? (s?(e)) ? s?(s?(e))

(b) s? (s?(e)) = s?pAQ(e)

(c) s? (s?(e)) = s?(s?(e))

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(d) s?(s?(e)) = s?pAQ(e)

Options:

12820635787. A

12820635788. B

12820635789. C

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12820635790. D

Question Number : 16 Question Id : 1282069048 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks: 1 Wrong Marks : 0

Which one of the following statements is false?

(a) Any relation with two attributes is in BCNF

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(b) Any relation in which every key has only one attribute is in 2NF

(c) A prime attribute can be transitively dependent on a key in a 3NF relation

(d) A prime attribute can be transitively dependent on a key in a BCNF relation

Options:

12820635791. A

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12820635792. B

12820635793. C

12820635794. D

Question Number : 17 Question Id : 1282069049 Question Type : MCQ Option Shuffling : No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks: 1 Wrong Marks : 0

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(100000)2 in Hexadecimal is:

(a) 10

(b) 20

(c) 80

(d) 100

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Options:

12820635795. A

12820635796. B

12820635797. C

12820635798. D

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Question Type: MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

If negative numbers are stored in 2's complement form, the range of numbers that can be stored in 8 bits is

(a) -128 to + 128

(b) -127 to +128

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(c) -128 to +127

(d) -127 to +127

Options:

12820635799. A

12820635800. B

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12820635801. C

12820635802. D

Question Number : 19 Question Id : 1282069051 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Which of the following is the minimum error code?

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(a) Octal code

(b) Binary Code

(c) Gray Code

(d) Excess -3 code

Options:

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12820635803. A

12820635804. B

12820635805. C

12820635806. D

Question Number: 20 Question Id : 1282069052 Question Type: MCQ Option Shuffling: No Display Question Number: Yes Single Line Question Option: No Option Orientation: Vertical

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Correct Marks : 1 Wrong Marks : 0

Microprogram is

(a) the name of a source program in microcomputer

(b) a primitive form of macros used in assemble language programming

(c) a program of very small size

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(d) the set of instructions indicating the primitive operations in a system

Options:

12820635807. A

12820635808. B

12820635809. C

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12820635810. D

Question Number: 21 Question Id: 1282069053 Question www.FirstRanker.com Shuffling : No Display Question Number : Yes Single Line Question Option : No Option Orientation: Vertical

How many flip-flop circuit are needed?

(a) 2

(b) 4

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(c) 8

(d) 16

Options:

12820635811. A

12820635812. B

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12820635813. C

12820635814. D

Question Number : 22 Question Id : 1282069054 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks: 1 Wrong Marks : 0

Let A be a set having 'n' elements. The number of binary operations that can be defined on A is:

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(a) n

(b) 2n

(c) n2n

(d) 22n

Options:

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12820635815. A

12820635816. B

12820635817. C

12820635818. D

Question Number: 23 Question Id : 1282069055 Question Type: MCQ Option Shuffling: No Display Question Number: Yes Single Line Question : Vertical

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Correct Marks : 1 Wrong Marks : 0

Which of the following logic families is well suited for high speed operation?

(a) TTL

(b) ECL

(c) MOS

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(d) CMOS

Options:

12820635819. A

12820635820. B

12820635821. C

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12820635822. D

Question Number : 24 Question Id : 1282069056 Question www.FirstRanker.com Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation: Vertical

You need 500 subnets each with about 100 hosts. What mask will you assign using a Class B network address?

(a) 255.255.255.252

(b) 255.255.255.128

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(c) 255.255.255.0

(d) 255.255.254.0

Options:

12820635823. A

12820635824. B

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12820635825. C

12820635826. D

Question Number : 25 Question Id : 1282069057 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

What is route poisoning?

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(a) It sends back the protocol received from a router as a poison pill, which stop the regular updates

(b) It is information received from a router that can not be sent back to the originating router

(c) It prevent regular update message from reinstating a route that has just come up.

(d) It describes when a router sets metrics for a downed link to infinity

Options:

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12820635827. A

12820635828. B

12820635829. C

12820635830. D

Question Number: 26 Question Id : 1282069058 Question Type: MCQ Option Shuffling: No Display Question Number: Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks : 1 Wrong Marks : 0

What is the smiley (emoticons) used for "Big nose" in E-mail?

(a) :-)

(b) ;-)

(c) :+)

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(d) <:-)

Options:

12820635831. A

12820635832. B

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Question Number: 27 Question Id : 1282069059 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks : 1 Wrong Marks : 0

Which of the multiplexing techniques used by SONET:

(a) FDM

(b) WWDM

(c) TDM

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(d) DWDM

Options:

12820635835. A

12820635836. B

12820635837. C

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12820635838. D

Question Number : 28 Question Id : 1282069060 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Which of the following modes are valid when a switch port is used as a VLAN trunk?

(a) Blocking

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(b) Desirable

(c) Transparent

(d) Learning

Options:

12820635839. A

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12820635840. B

12820635841. C

12820635842. D

Question Number: 29 Question Id : 1282069061 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

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Consider the set of real numbers with the binary relation R = {(i,j) : ij = 0}.

Which one of the following statements about R is true?

(a) R is reflexive

(b) R is symmetric

(c) R is transitive

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(d) None of the above

Options:

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Question Number: 30 Question Id : 1282069062 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

Correct Marks : 1 Wrong Marks : 0

Which one of the following is a cyclic group?

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(a) Rational numbers under addition

(b) nth roots of unity under multiplication

(c) Non-zero real numbers under multiplication

(d) Complex numbers under addition

Options:

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12820635847. A

12820635848. B

12820635849. C

12820635850. D

Question Number: 31 Question Id : 1282069063 Question Type : MCQ Option Shuffling: No Display Question Number : Yes Single Line Question Option : No Option Orientation : Vertical

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Correct Marks : 1 Wrong Marks : 0

The number of relations on a set with n elements which are reflexive is

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