ISRO Scientist/Engineer SC Computer Science 2011 — ISRO Scientist/Engineer SC 2011 · Computer Science

Computer Science · 79 of 80 questions publicly available

Question 1 Q11807

The encoding technique used to transmit the signal in giga ethernet technology over fiber optic medium is

  1. A.

    Differential Manchester encoding

  2. B.

    Non return to zero

  3. C.

    4B/5B encoding

  4. D.

    8B/10B encoding

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 2 Q11828

Which of the following is an unsupervised neural network?

  1. A.

    RBS

  2. B.

    Perceptron

  3. C.

    Back propagation

  4. D.

    Kohonen

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 3 Q11836

In compiler terminology reduction in strength means

  1. A.

    Replacing run time computation by compile time computation

  2. B.

    Removing loop invariant computation

  3. C.

    Removing common subexpressions

  4. D.

    replacing a costly operation by a relatively cheaper one

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 4 Q11759

The following table shows the processes in the ready queue and time required for each process for completing its job. 

Process    Time
P1          10
P2          5
P3          20
P4          8
P5          15

If round-robin scheduling with 5 ms is used what is the average waiting time of the processes in the queue?

  1. A.

    27 ms

  2. B.

    26.2 ms

  3. C.

    27.5 ms

  4. D.

    27.2 ms

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 5 Q11796

MOV [BX], AL type of data addressing is called

  1. A.

    Register addressing

  2. B.

    Immediate addressing

  3. C.

    Register indirect addressing

  4. D.

    Register relative

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 6 Q11783

Evaluate (X xor Y) xor Y?

  1. A.

    All 1's

  2. B.

    All 0's

  3. C.

    X

  4. D.

    Y

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 7 Q11827

Which of the following is true about z-buffer algorithm?

  1. A.

    It is a depth sort algorithm

  2. B.

    No limitation on total number of objects in the scene

  3. C.

    Comparison of objects is done

  4. D.

    z-buffer is initialized to background colour at start of algorithm

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 8 Q11785

What is the decimal value of the floating-point number C1D00000 (hexadecimal notation)? (Assume 32-bit, single precision floating point IEEE representation)

  1. A.

    28

  2. B.

    -15

  3. C.

    -26

  4. D.

    -28

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 9 Q11800

What is the raw throughput of USB 2.0 technology?

  1. A.

    480 Mbps

  2. B.

    400 Mbps

  3. C.

    200 Mbps

  4. D.

    12 Mbps

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 10 Q11822

Below is the precedence graph for a set of tasks to be executed on a parallel processing system S.

image.png

What is the efficiency of this precedence graph on S if each of the tasks T1, T2, T3,....T8 takes the same time and the system S has five processors?

  1. A.

    25%

  2. B.

    40%

  3. C.

    50%

  4. D.

    90%

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 11 Q11832

How many distinct binary search trees can be created out of 4 distinct keys?

  1. A.

    5

  2. B.

    14

  3. C.

    24

  4. D.

    35

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 12 Q11804

The network protocol which is used to get MAC address of a node by providing IP address is

  1. A.

    SMTP

  2. B.

    ARP

  3. C.

    RIP

  4. D.

    BOOTP

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 13 Q102607

Which of the following statements about peephole optimizations is False?

  1. A.

    It is applied to a small part of the code

  2. B.

    It can be used to optimize intermediate code

  3. C.

    To get the best out of this, it has to be applied repeatedly

  4. D.

    It can be applied to a portion of the code that is not contiguous

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 14 Q11011

Which one of the following in place sorting algorithms needs the minimum number of swaps?

  1. A.

    Quick sort

  2. B.

    Insertion sort

  3. C.

    Selection sort

  4. D.

    Heap sort

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 15 Q11773

What is the equivalent serial schedule for the following transactions? 

T1          T2          T3
                       R(Y)
                       R(Z)
R(X)
W(X) 
                       W(Y)
                       W(Z)
           W(Z)
R(Y)
W(Y) 
           R(Y)
           W(Y)
           R(X)
           W(X)
  1. A.

    T1 − T2 − T3

  2. B.

    T3 − T1 − T2

  3. C.

    T2 − T1 − T3

  4. D.

    T1 − T3 − T2

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 16 Q11795

Consider a direct mapped cache with 64 blocks and a block size of 16 bytes. To what block number does the byte address 1206 map to

  1. A.

    does not map

  2. B.

    6

  3. C.

    11

  4. D.

    54

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 17 Q11810

A context model of a software system can be shown by drawing a

  1. A.

    LEVEL-0 DFD

  2. B.

    LEVEL-1 DFD

  3. C.

    LEVEL-2 DFD

  4. D.

    LEVEL-3 DFD

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 18 Q11814

An example of poly-alphabetic substitution is

  1. A.

    P-box

  2. B.

    S-box

  3. C.

    Caesar cipher

  4. D.

    Vigenere cipher

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 19 Q11793

If node A has three siblings and B is parent of A, what is the degree of A?

  1. A.

    0

  2. B.

    3

  3. C.

    4

  4. D.

    Cannot be determined

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 21 Q11772

Which type of DBMS provides support for maintaining several versions of the same entity?

  1. A.

    Relational Data Base Management Systems

  2. B.

    Hierarchical

  3. C.

    Object Oriented Data Base Management Systems

  4. D.

    Network

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 22 Q11829

A system is having 8 M bytes of video memory for bit-mapped graphics with 64-bit colour. What is the maximum resolution it can support?

  1. A.

    800 x 600

  2. B.

    1024 x 768

  3. C.

    1280 x 1024

  4. D.

    1920 x 1440

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 23 Q11820

What is the meaning of RD'signal in Intel 8151 A?

  1. A.

    Read (when it is low)

  2. B.

    Read (when it is high)

  3. C.

    Write (when it is low)

  4. D.

    Read and Write (when it is high)

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 24 Q11764

If the page size in a 32-bit machine is 4K bytes then the size of page table is

  1. A.

    1 M bytes

  2. B.

    2 M bytes

  3. C.

    4 M bytes

  4. D.

    4 K bytes

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 25 Q11216

A processor takes 12 cycles to complete an instruction I. The corresponding pipelined processor uses 6 stages with the execution times of 3, 2, 5, 4, 6 and 2 cycles respectively. What is the asymptotic speedup assuming that a very large number of instructions are to be executed?

  1. A.

    1.83

  2. B.

    2

  3. C.

    3

  4. D.

    6

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 26 Q11833

The in-order traversal of a tree resulted in FBGADCE. Then the pre-order traversal of that tree would result in

  1. A.

    FGBDECA

  2. B.

    ABFGCDE

  3. C.

    BFGCDEA

  4. D.

    AFGDBEC

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 27 Q11776

Which one of the following is true?

  1. A.

    R ∩ S = (R ∪ S) − [(R − S) ∪ (S − R)]

  2. B.

    R ∪ S = (R ∩ S) − [(R − S) ∪ (S − R)]

  3. C.

    R ∩ S = (R ∪ S) − [(R − S) ∩ (S − R)]

  4. D.

    R ∩ S = (R ∪ S) ∪ (R − S)

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 28 Q11812

Filled initial node, then Login, Send and Logout action boxes connected by arrows, ending at a bullseye final node.

The above figure represents which one of the following UML diagrams for a single send session of an online chat system?

  1. A.

    Package diagram

  2. B.

    Activity diagram

  3. C.

    Class diagram

  4. D.

    Sequence diagram

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 29 Q11771

Which ‘Normal Form’ is based on the concept of “full functional dependency” is

  1. A.

    First Normal Form

  2. B.

    Second Normal Form

  3. C.

    Third Normal Form

  4. D.

    Fourth Normal Form

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 30 Q11778

In Boolean algebra, rule (X+Y)(X+Z) =

  1. A.

    Y+XZ

  2. B.

    X+YZ

  3. C.

    XY+Z

  4. D.

    XZ+Y

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 31 Q102608

How many 3-to-8 line decoders with a chip having enable pin are needed to construct a 6-to-64 line decoder without using any other logic gates?

  1. A.

    7

  2. B.

    8

  3. C.

    9

  4. D.

    10

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 32 Q11806

In which layer of network architecture, the secured socket layer (SSL) is used?

  1. A.

    physical layer

  2. B.

    session layer

  3. C.

    application layer

  4. D.

    presentation layer

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 33 Q11830

What is the bit rate of a video terminal unit with 80 character/line, 8 bits/charcter and horizontal sweep time of 100 μs (including 20 μs of retrace time)?

  1. A.

    8 Mbps

  2. B.

    6.4 Mbps

  3. C.

    0.8 Mbps

  4. D.

    0.64 Mbps

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 34 Q11813

Black Box Software Testing method focuses on the

  1. A.

    Boundary condition of the software

  2. B.

    Control structure of the software

  3. C.

    Functional requirement of the software

  4. D.

    Independent paths of the software

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 35 Q11792

How many edges are there in a forest with v vertices and k components?

  1. A.

    (v + 1) − k

  2. B.

    (v + 1)/2 − k

  3. C.

    v − k

  4. D.

    v + k

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 36 Q11777

If A and B are square matrices of the same order and A is symmetric, then BTAB is

  1. A.

    Skew symmetric

  2. B.

    Symmetric

  3. C.

    Orthogonal

  4. D.

    Idempotent

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 37 Q11818

Find the memory address of the next instruction executed by the microprocessor (8086), when operated in real mode for CS=1000 and IP=E000

  1. A.

    10E00

  2. B.

    1E000

  3. C.

    F000

  4. D.

    1000E

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 38 Q11767

A fast wide SCSI-II disk drive spins at 7200 RPM, has a sector size of 512 bytes, and holds 160 sectors per track. Estimate the sustained transfer rate of this drive

  1. A.

    576000 Kilobytes / sec

  2. B.

    9600 Kilobytes / sec

  3. C.

    4800 Kilobytes / sec

  4. D.

    19200 Kilobytes / sec

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 39 Q11819

Two control signals in microprocessor which are related to Direct Memory Access (DMA) are

  1. A.

    INTR & INTA

  2. B.

    RD & WR

  3. C.

    S0 & S1

  4. D.

    HOLD & HLDA

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 40 Q11757



Consider the following pseudocode: 

x :=1;
i :=1;
while (x ≤ 500)
begin
x :=2x ;
i :=i+1;
end

What is the value of i at the end of the pseudocode?

  1. A.

    4

  2. B.

    5

  3. C.

    6

  4. D.

    7

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 41 Q11794

If a microcomputer operates at 5 MHz with an 8-bit bus and a newer version operates at 20 MHz with a 32-bit bus, the maximum speed-up possible approximately will be

  1. A.

    2

  2. B.

    4

  3. C.

    8

  4. D.

    16

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 42 Q11801

The search concept used in associative memory is

  1. A.

    Parallel search

  2. B.

    Sequential search

  3. C.

    Binary search

  4. D.

    Selection search

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 43 Q11787

Which variable does not drive a terminal string in grammar? S -> AB A -> a B -> b B -> C

  1. A.

    A

  2. B.

    B

  3. C.

    C

  4. D.

    S

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 44 Q11817

In Java, after executing the following code what are the values of x, y and z? 
int x,y=10, z=12; 
x=y++ + z++;

  1. A.

    x=22, y=10, z=12

  2. B.

    x=24, y=10, z=12

  3. C.

    x=24, y=11, z=13

  4. D.

    x=22, y=11, z=13

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 45 Q11824

The broadcast address for IP network 172.16.0.0 with subnet mask 255.255.0.0 is

  1. A.

    172.16.0.255

  2. B.

    172.16.255.255

  3. C.

    255.255.255.255

  4. D.

    172.255.255.255

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 46 Q11774

Which RAID level gives block level striping with double distributed parity?

  1. A.

    RAID 10

  2. B.

    RAID 2

  3. C.

    RAID 6

  4. D.

    RAID 5

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 47 Q11779

The output expression of the following gate network is

Gate network: one AND joins X and Y; another AND joins their inverted signals; an OR combines both AND outputs.
  1. A.

    X. Y + X' Y'

  2. B.

    X. Y + X. Y

  3. C.

    X. Y

  4. D.

    X + Y

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 48 Q11802

The hamming distance between the octets of 0xAA and 0x55 is

  1. A.

    7

  2. B.

    5

  3. C.

    8

  4. D.

    6

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 49 Q11765

Consider a 32-bit machine where four-level paging scheme is used. If the hit ratio to TLB is 98%, and it takes 20 nanoseconds to search the TLB and 100 nanoseconds to access the main memory what is effective memory access time in nanoseconds?

  1. A.

    126

  2. B.

    128

  3. C.

    122

  4. D.

    120

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 50 Q11805

Data is transmitted continuously at 2.048 Mbps rate for 10 hours and received 512 bit errors. What is the bit error rate?

  1. A.

    6.9 × 10−9

  2. B.

    6.9 × 10−6

  3. C.

    69 × 10−9

  4. D.

    4 × 10−9

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 51 Q11811

Warnier Diagram enables the analyst to represent

  1. A.

    Class structure

  2. B.

    Information Hierarchy

  3. C.

    Data Flow

  4. D.

    State Transition

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 52 Q11791

Given X: 0 10 16 Y: 6 16 28 The interpolated value at X = 4 using piecewise linear interpolation is

  1. A.

    11

  2. B.

    4

  3. C.

    22

  4. D.

    10

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 53 Q11770

In functional dependency Armstrong inference rules refers to

  1. A.

    Reflexive, Augmentation and Decomposition

  2. B.

    Transitive, Augmentation and Reflexive

  3. C.

    Augmentation, Transitive, Reflexive and Decomposition

  4. D.

    Reflexive, Transitive and Decomposition

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 54 Q11799

Number of chips (128 x 8 RAM) needed to provide a memory capacity of 2048 bytes

  1. A.

    2

  2. B.

    4

  3. C.

    8

  4. D.

    16

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 55 Q11758

There are three processes in the ready queue. When the currently running process requests for I/O how many process switches take place?

  1. A.

    1

  2. B.

    2

  3. C.

    3

  4. D.

    4

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 56 Q11761

Let T(n) be defined by T(1) = 10 and T(n + 1) = 2n + T(n) for all integers n ≥ 1. Which of the following represents the order of growth of T(n) as a function of n?

  1. A.

    O(n)

  2. B.

    O(n log n)

  3. C.

    O(n2)

  4. D.

    O(n3)

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 57 Q11815

Which of the following UNIX command allows scheduling a program to be executed at the specified time?

  1. A.

    cron

  2. B.

    nice

  3. C.

    date and time

  4. D.

    schedule

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 58 Q11797

In DMA transfer scheme, the transfer scheme other than burst mode is

  1. A.

    cycle technique

  2. B.

    stealing technique

  3. C.

    cycle stealing technique

  4. D.

    cycle bypass technique

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 59 Q11790

n-th derivative of xn is

  1. A.

    n xn-1

  2. B.

    nn . n!

  3. C.

    nxn !

  4. D.

    n!

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 60 Q11823

A total of 9 units of a resource type are available, and given the safe state shown below, which of the following sequence will be a safe state? Process Used Max P1 2 7 P2 1 6 P3 2 5 P4 1 4

  1. A.

    (P4, P1, P3, P2)

  2. B.

    (P4, P2, P1, P3)

  3. C.

    (P4, P2, P3, P1)

  4. D.

    (P3, P1, P2, P4)

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 61 Q11775

Three coins are tossed simultaneously. The probability that they will fall two heads and one tail is

  1. A.

    5/8

  2. B.

    1/8

  3. C.

    2/3

  4. D.

    3/8

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 62 Q11831

The expected average depth of a binary search tree built by uniformly random insertion is:

  1. A.

    O(n0.5)

  2. B.

    O(n)

  3. C.

    O(log n)

  4. D.

    O(n log n)

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): C

Solutions and video are in the course

Question 63 Q11756

What is the output of the following C code?

#include <stdio.h>
#include <conio.h>

void main()
{
    int index;
    for (index = 1; index <= 5; index++)
    {
        printf("%d", index);
        if (index == 3)
            continue;
    }
}
  1. A.

    1245

  2. B.

    12345

  3. C.

    12245

  4. D.

    12354

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 64 Q11782

When n-type semiconductor is heated?

  1. A.

    number of electrons increases while that of holes decreases

  2. B.

    number of holes increases while that of electrons decreases

  3. C.

    number of electrons and holes remain the same

  4. D.

    number of electron and holes increases equally

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 65 Q11809

The Cyclomatic Complexity metric V(G) of the following control flow graph is

Directed graph: a to b and c; c to b and e; b to d; d to b; e to d.
  1. A.

    3

  2. B.

    4

  3. C.

    5

  4. D.

    6

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 66 Q11763

Which of the following algorithm design techniques is used in merge sort?

  1. A.

    Greedy method

  2. B.

    Backtracking

  3. C.

    Dynamic programming

  4. D.

    Divide and Conquer

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 67 Q11789

The arithmetic mean of attendance of 49 students of class A is 40% and that of 53 students of class B is 35%. Then the percentage of arithmetic mean of attendance of class A and B is

  1. A.

    27.2%

  2. B.

    50.25%

  3. C.

    51.13%

  4. D.

    37.4%

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 68 Q11786

Which of the following sentences can be generated by 

S -> aS | bA
A -> d | cA
  1. A.

    bccdd

  2. B.

    abbcca

  3. C.

    abcabc

  4. D.

    abcd

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 69 Q11808

Lightweight Directory Access protocol is used for

  1. A.

    Routing the packets

  2. B.

    Authentication

  3. C.

    obtaining IP address

  4. D.

    domain name resolving

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 70 Q11769

Number of comparisons required for an unsuccessful search of an element in a sequential search, organized, fixed length, symbol table of length L is

  1. A.

    L

  2. B.

    L/2

  3. C.

    (L+1)/2

  4. D.

    2L

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 71 Q11760

One SAN switch has 24 ports. All 24 port supports 8 Gbps Fiber Channel technology. What is the aggregate bandwidth of that SAN switch?

  1. A.

    96 Gbps

  2. B.

    192 Mbps

  3. C.

    512 Gbps

  4. D.

    192 Gbps

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 72 Q11816

Find the output of the following Java code line 

System.out.println(Math.floor(-7.4))

  1. A.

    -7

  2. B.

    -8.0

  3. C.

    -7.4

  4. D.

    -7.0

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 73 Q11766

Belady's anomaly means

  1. A.

    Page fault rate is constant even on increasing the number of allocated frames

  2. B.

    Page fault rate may increase on increasing the number of allocated frames

  3. C.

    Page fault rate may increase on decreasing the number of allocated frames

  4. D.

    Page fault rate may decrease on increasing the number of allocated frames

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): B

Solutions and video are in the course

Question 74 Q11780

In an RS flip-flop, if the S line (Set line) is set high (1) and the R line (Reset line) is set low (0), then the state of the flip-flop is

  1. A.

    Set to 1

  2. B.

    Set to 0

  3. C.

    No change in state

  4. D.

    Forbidden

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 75 Q11835

In HTML, which of the following is the container for all visible page content?

  1. A.

    <SELECT>

  2. B.

    <Value>

  3. C.

    <INPUT>

  4. D.

    <BODY>

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 76 Q11825

What is the matrix that represents rotation of an object by θ degree about the origin in 2D?

  1. A. 
    cos θ    −sin θ
sin θ     cos θ
  2. B. 
    sin θ   −cos θ
cos θ    sin θ
  3. C. 
    cos θ   −sin θ
cos θ    sin θ
  4. D. 
    sin θ   −cos θ
cos θ    sin θ
Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 77 Q11821

In a system having a single processor, a new process arrives at the rate of six processes per minute and each such process requires seven seconds of service time. What is the CPU utilization?

  1. A.

    70%

  2. B.

    30%

  3. C.

    60%

  4. D.

    64%

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 78 Q11768

A symbol table of length 152 is possessing 25 entries at any instant. What is occupation density?

  1. A.

    0.164

  2. B.

    127

  3. C.

    8.06

  4. D.

    6.08

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course

Question 79 Q98221

A problem whose language is recursive is called:

  1. A.

    Unified problem

  2. B.

    Boolean function

  3. C.

    Undecidable problem

  4. D.

    Decidable

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): D

Solutions and video are in the course

Question 80 Q11784

Logic family popular for low power dissipation

  1. A.

    CMOS

  2. B.

    ECL

  3. C.

    TTL

  4. D.

    DTL

Official answer key

Official answer key (ISRO Scientist/Engineer SC Computer Science 2011 ISRO Scientist/Engineer SC 2011 · Computer Science): A

Solutions and video are in the course