ISRO Scientist or Engineer Computer Science 2009

ISRO Scientist or Engineer Computer Science 2009 - Question 1

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The subnet mask for a particular networkis 255.255.31.0 Whichof the following pairs of IP addresses could belong to this network?

A

172.57.88.62 and 172.56.87.23

B

10.35.28.2 and 10.35.29.4

C

191.203.31.87 and 191.234.31.88

D

128.8.129.43 and 128.8.161.5

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ISRO Scientist or Engineer Computer Science 2009 - Question 2

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In networking, UTP stands for

A

Unshielded T-connector port

B

Unshielded twisted pair

C

Unshielded terminating pair

D

Universal transmission process

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ISRO Scientist or Engineer Computer Science 2009 - Question 3

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The address resolution protocol (ARP) is used for

A

Finding the IP address from the DNS

B

Finding the IP address of the default gateway

C

Finding the IP address that corresponds to a MAC address

D

Finding the MAC address that corresponds to an IP address

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ISRO Scientist or Engineer Computer Science 2009 - Question 4

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Whichof the following is a MAC address?

A

192.166.200.50

B

00056A:01 ASCCA7FF60

C

568, Airport Road

D

01:A5:BB:A7:FF:60

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ISRO Scientist or Engineer Computer Science 2009 - Question 5

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Whatis the primary purpose of a VLAN?

A

Demonstrating the proper layout for a network

B

Simulating a network

C

To create a virtual private network

D

Segmenting a network inside a switch or device

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ISRO Scientist or Engineer Computer Science 2009 - Question 6

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SHA-1 is a

A

Encryption algorithm

B

Decryption algorithm

C

Key exchangealgorithm

D

Message digestfunction.

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ISRO Scientist or Engineer Computer Science 2009 - Question 7

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Advanced Encryption Standard (AES) is based on

A

Asymmetric key algorithm

B

Symmetric key algorithm

C

Public key algorithm

D

Key exchange

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ISRO Scientist or Engineer Computer Science 2009 - Question 8

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The primary purpose of an operating system is

A

To make the mostefficient use of the computer hardware

B

To allow people to use the computer

C

To keep systems programmers employed

D

To make computers easier to use

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ISRO Scientist or Engineer Computer Science 2009 - Question 9

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Whichis the correctdefinition of a valid processtransition in an operating system?

A

Wake up: ready $$ \rightarrow $$ running

B

Dispatch: ready $$ \rightarrow $$ running

C

Block: ready $$ \rightarrow $$ running

D

Timer runout: $$ \rightarrow $$ ready $$ \rightarrow $$ blocked

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ISRO Scientist or Engineer Computer Science 2009 - Question 10

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The correct matching for the following pairs is

A

A-3, B-4, C-2, D-1

B

A-4, B-3, C-2, D-1

C

A-3, B-4, C-1, D-2

D

A-2, B-4, C-1, D-3

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ISRO Scientist or Engineer Computer Science 2009 - Question 11

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A page fault

A

Occurs when a program accesses an available page of memory

B

is an error in a specific page

C

is a reference to a page belonging to another program

D

Occurs when a program accesses a page not currently in memory

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ISRO Scientist or Engineer Computer Science 2009 - Question 12

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Using larger block size in a fixed block size file system leads to

A

Better disk throughput but poorer disk space utilization

B

Better disk throughput and better disk space utilization

C

Poorer disk throughput but better disk space utilization

D

Poorer disk throughput and poorer disk space utilization

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ISRO Scientist or Engineer Computer Science 2009 - Question 13

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Whichof the following statements about synchronous and asynchronous 1/0 is NOT true?

A

An ISR is invoked on completion of I/O in synchronous I/O but not in asynchronous I/O

B

In both synchronous and asynchronous I/O an ISR (Interrupt Service Routine)is invoked after completian of the I/O

C

Aprocess making a synchronous I/O call waits until I/O is complete, but a process making an asynchronous I/O call does not wait for completion of the I/O

D

In the case of synchronous I/O, the process waiting forthe completion of I/O is woken up by the ISR that is invoked after the completion of I/O

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ISRO Scientist or Engineer Computer Science 2009 - Question 14

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Consider three CPU-intensive processes, which require 10,20 and 30 time units and arrive at times 0,2, and 6, respectively. How many context switches are neededif the operating system implements a shortest remaining timefirst scheduling algorithm? Do not count the context switchesat time zero and at the end

A

1

B

2

C

3

D

4

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ISRO Scientist or Engineer Computer Science 2009 - Question 15

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The performanceof Round Robin algorithm depends heavily on

A

Size of the process

B

The I/O bursts of the process

C

The CPU bursts of the process

D

The size of the time quantum

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ISRO Scientist or Engineer Computer Science 2009 - Question 16

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Consider a system having “n” resources of same type. These resources are shared by 3 processes A, B, C. These have peak demands of 3, 4 and 6 respectively. For what value of “n” deadlock won’t occur

A

15

B

9

C

10

D

13

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ISRO Scientist or Engineer Computer Science 2009 - Question 17

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Consider a set of 5 processes whose arrival time, CPU time needed and the priority are given below.

(Smaller the number, higher the priority.)
if the CPU scheduling policy is priority scheduling without pre-emption, the average waiting time will be

A

12.8 ms

B

11.8 ms

C

10.8 ms

D

09.8 ms

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ISRO Scientist or Engineer Computer Science 2009 - Question 18

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The range of integers that can be represented by an n-bit 2’s compiement number system is

A

$$ -2^{n - 1} to (2^{n - 1} - 1) $$

B

$$ -(2^{n - 1} - 1) to (2^{n - 1} - 1) $$

C

$$ -2^{n - 1} to 2^{n - 1} $$

D

$$ -(2^{n - 1} + 1) to (2^{n - 1} - 1) $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 19

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The switching expression corresponding to $$f(A, B, C, D) = \sum (1, 4, 5, 9, 11, 12)$$ is

A

$$BC'D’ + A’C’D + AB'D$$

B

$$ABC’ + ACD + B’C’D$$

C

$$ACD’ + A’BC’ + AC'D’$$

D

$$A’BD + ACD’ + BCD'$$

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ISRO Scientist or Engineer Computer Science 2009 - Question 20

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Consider the following boolean function of four variables $$f(w, x, y, z) = \sum (1, 3, 4, 6, 9, 11, 12, 14)$$, The function is

A

Independent of one variabie

B

Independentof two variables

C

Independentof three variables

D

Dependent on all the variables

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ISRO Scientist or Engineer Computer Science 2009 - Question 21

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In which addressing mode,the effectives address of the operand is generated by adding a constantvalue to the content of a register?

A

Absolute mode

B

Indirect mode

C

Immediate mode

D

Index mode

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ISRO Scientist or Engineer Computer Science 2009 - Question 22

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A certain microprocessor requires 4.5 microseconds to respond to an interrupt. Assuming that the three interrupts $$ I_1, I_2$$ and $$I_3 $$ require the following execution time after the interrupt is recognized :
(i) $$ I_1 $$ requires 25 micro seconds
(ii) $$ I_2 $$ requires 35 microseconds
(iii) $$ I_3 $$ requires 20 microseconds
$$ I_1 $$ has the highest priority and $$ I_3 $$ has the lowest. What is the possible range of time for $$ I_3 $$ to be executed assuming that it may or may not occur simultaneously with other interrupts?

A

24.5 microseconds to 39.5 microseconds

B

24.5 microseconds to 93.5 microseconds

C

4.5 microseconds to 24.5 microseconds

D

29.5 microseconds to 93.5 microseconds

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ISRO Scientist or Engineer Computer Science 2009 - Question 23

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The processof organizing the memory into two banksto allow 8- and 16- bit data operation is called

A

Bank switching

B

Indexed mapping

C

Two-way memory interleaving

D

Memory segmentation

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ISRO Scientist or Engineer Computer Science 2009 - Question 24

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Suppose the numbers 7, 5, 1, 8, 3, 6, 0, 9, 4, 2 are inserted in that order into an initially empty binary search tree. The binary search tree uses the usual ordering on natural numbers. What is the inorder traversal sequenceof the resultant tree?

A

7 5 1 0 3 2 4 6 8 9

B

0 2 4 3 1 6 5 9 8 7

C

0 1 2 3 4 5 6 7 8 9

D

9 8 6 4 2 3 0 1 5 7

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ISRO Scientist or Engineer Computer Science 2009 - Question 25

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A data structure is required for storing a set of integers such that each of the following operations can be done in (log n) time, where n is the number of elementsin the set.
1. Deletion of the smallest element.
2. Insertion of an element if it is not already present in the set.
Whichof the following data structures can be used for this purpose?

A

A heap can be used but not a balanced binary search tree

B

A balanced binary search tree can be used but not a heap

C

Both balanced binary search tree and heap can be used

D

Neither balanced binary search tree nor heap can be used

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ISRO Scientist or Engineer Computer Science 2009 - Question 26

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The following numbers are inserted into an empty binary search tree in the given order: 10, 1, 3, 5, 15, 12, 16. What is the height of the binary search tree (the height is the maximum distance of a leaf node from the root)?

A

2

B

3

C

4

D

6

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ISRO Scientist or Engineer Computer Science 2009 - Question 27

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Assume that the operators $$ +, -, \times $$ are left associative and ^ is right associative. The order of precedence (from highest to lowest) is ^, $$ \times , +, -.$$ The postfix expression corresponding to the infix expression $$ a + b \times c - d$$ ^ e ^ f is

A

$$ abc \times + def$$^ ^ -

B

$$ abc \times + de$$ ^ f ^

C

$$ ab + c \times d - e$$ ^ f ^

D

$$ - + a \times bc$$ ^ ^ def

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ISRO Scientist or Engineer Computer Science 2009 - Question 28

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The infix expression A + (B — C)* D is correctly represented in prefix notation as

A

$$ A + B - C * D $$

B

$$ + A * - BCD $$

C

$$ ABC - D * + $$

D

$$ A + BC - D * $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 29

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A one dimensionalarray A has indices 1.... 75. Each element is a string and takes up three memory words. The arrayis stored at location 1120 decimal. The starting addressof A [49] is

A

1267

B

1164

C

1264

D

1169

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ISRO Scientist or Engineer Computer Science 2009 - Question 30

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Thefive items: A, B, C, D, and E are pushed in a stack, one after the other starting from A. The stack is popped four times and each elementis inserted in a queue. Then two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item is

A

A

B

B

C

C

D

D

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ISRO Scientist or Engineer Computer Science 2009 - Question 31

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A full binary tree with n leaves contains

A

$$ n$$ nodes 

B

$$ \log_2 n$$ nodes 

C

$$ 2n - 1 $$

D

$$ 2^n$$ nodes 

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ISRO Scientist or Engineer Computer Science 2009 - Question 32

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The expression 1 * 2 ^ 3 * 4 ^ 5 * 6 will be evaluated as

A

$$ 32^{30} $$

B

$$ 162^{30} $$

C

$$ 49152 $$

D

$$ 173458 $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 33

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The feature in object-oriented programming that allows the same operation to be carried out differently, depending on the object,is

A

Inheritance

B

Polymorphism

C

Overfunctioning

D

overriding

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ISRO Scientist or Engineer Computer Science 2009 - Question 34

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The microinstructions stored in the control memory of a processor have a width of 26 bits. Each microinstruction is divided into three fields: a micro-operation field of 13 bits, a next addressfield (X), and a MUX selectfield (Y). There are 8 status bits in the inputs of the MUX. How manybits are there in the X and fields, and whatis the size of the control memoryin number of words?

A

10, 3, 1024

B

8, 5, 256

C

5, 8, 2048

D

10, 3, 512

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ISRO Scientist or Engineer Computer Science 2009 - Question 35

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A CPU has 24-bit instructions. A program starts at address 300 (in decimal). Which one ofthe following is a legal program counter(all values in decimal)?

A

400

B

500

C

600

D

700

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ISRO Scientist or Engineer Computer Science 2009 - Question 36

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Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors pertrack. 512 bytes of data are stores in a bit serial manner ina sector. The capacity of the disk pack and the numberof bits required to specify a particular sector in the disk are respectively

A

256 Mbyte, 19 bits

B

256 Mbyte, 28 bits

C

512 Mbyte, 20 bits

D

64 Gbyte, 28 bits

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ISRO Scientist or Engineer Computer Science 2009 - Question 37

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Consider a pipelined processor with the following four stages
IF: Instruction Fetch
ID: Instruction Decode and Operand Fetch
EX: executed
WB: Write Back
The IF, ID and WB stagestake one clock cycle each to complete the operation. The ADD and SUB instructions need 1 clock cycle and the MUL instruction need 3 clock cycles in the EX stage. Operand forwarding is usedin the pipelined processor. What is the number of clock cycles taken to complete the following sequence of instructions?
ADD R2, R1, RO R2 $$\leftarrow$$ R1 + R0
MUL R4, R3, R2 R4 $$\leftarrow$$ R3 * R2
SUB R6, R5, R4 R6 $$\leftarrow$$ R5 - R4

A

7

B

8

C

10

D

14

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ISRO Scientist or Engineer Computer Science 2009 - Question 38

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The use of multiple register windows with overlap causes a reduction in the number of memory accesses for
1.Function locals and parameters
2.Register saves and restores
3.Instruction fetches

A

1 only

B

2 only

C

3 only

D

1, 2 and 3

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ISRO Scientist or Engineer Computer Science 2009 - Question 39

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A processorthat has carry, overflow and sign flag bits as part of its program status word (PSW)performsaddition of the following two 2’s complement numbers 01001101 and 11101001. After the execution of this addition operation, the status of the carry, overflow and sign flags, respectively will be

A

1, 1, 0

B

1, 0, 0

C

0, 1, 0

D

1, 0, 1

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ISRO Scientist or Engineer Computer Science 2009 - Question 40

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The two numbers given below are multiplied using the Booth’s algorithm.
Multiplicand : 0101 1010 1110 1110
Multiplier: 0111 0111 1011 1101
How manyadditions/Subtractions are required for the multiplication of the above two numbers?

A

6

B

8

C

10

D

12

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ISRO Scientist or Engineer Computer Science 2009 - Question 41

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The addition of 4-bit, two’s complement, binary numbers 1101 and 0100 results in

A

0001 and an overflow

B

1001 and no overflow

C

0001 and no overflow

D

1001 and an overflow

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ISRO Scientist or Engineer Computer Science 2009 - Question 42

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Which of the flowing statements about relative addressing modeis FALSE?

A

It enables reduced instruction size

B

It allows indexing of array element with same instruction

C

It enables easy relocation of data

D

It enables faster address calculation than absolute addressing

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ISRO Scientist or Engineer Computer Science 2009 - Question 43

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Substitution of values for names (whose values are constants) is done in

A

Local optimization

B

Loop optimization

C

Constant folding

D

Strength reduction

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ISRO Scientist or Engineer Computer Science 2009 - Question 44

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A root $$\alpha$$ of equation f(x) = 0 can be computed to any degree of accuracyif a ‘good’ initial approximation $$ X_0 $$ is chosen for which

A

$$ f (X_0) > 0 $$

B

$$ f (X_0) f'' (X_0) > 0 $$

C

$$ f (X_0) f'' (X_0) < 0 $$

D

$$ f'' (X_0) > 0 $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 45

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Whichof the following statement is correct

A

$$ \triangle(U_k V_k) = U_k \triangle V_k + V_k \triangle U_k $$

B

$$ \triangle(U_k V_k) = U_{k + 1} \triangle V_k + V_{k + 1} \triangle U_k $$

C

$$ \triangle(U_k V_k) = V_{k + 1} \triangle U_k + U_k \triangle V_k $$

D

$$ \triangle(U_k V_k) = U_{k + 1} \triangle V_k + V_k \triangle U_k $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 46

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The shift operator E is defined as
$$ E [f(X_i)] = f (X_i + h) $$ and $$ E^{-1} [f(X_i)] = f (X_i - h) $$
Then $$ \triangle $$ (forward difference) in terms of E is

A

$$ E - 1 $$

B

$$ E $$

C

$$ 1 - E^{-1} $$

D

$$ 1 - E $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 47

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The formula $$ \int_{x0}^{xn} y(n) dx \simeq h/2 (y_0 + 2y_1 + ..... + 2y_{n - 1} + y_n) -h/12 ( \triangledown y_n - \triangle y_0) -h/24 (\triangledown^2 y_n + \triangle^2 y_0) -19h/720 (\triangledown^3 y_n - \triangle^3 y_0) $$ ....... is called

A

Simpson rule

B

Trapezoidal rule

C

Romberg’s rule

D

Gregory’s formula

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ISRO Scientist or Engineer Computer Science 2009 - Question 48

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The cubic polynomial y(x) which takes the following values: y(0) = 1, y(1) = 0, y(2) = 1 and y(3) = 10 is,

A

$$ X^3 + 2X^2 + 1 $$

B

$$ X^3 + 3X^2 - 1 $$

C

$$ X^3 + 1 $$

D

$$ X^3 - 2X^2 + 1 $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 49

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$$x = a \cos(t), y = b \sin(t)$$ is the parametric form of

A

Ellipse

B

Hyperbola

C

Circle

D

Parabola

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ISRO Scientist or Engineer Computer Science 2009 - Question 50

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The value of x at which y is minimum for $$ y = x^2 - 3x + 1$$ is

A

$$\frac{-3}{2}$$

B

$$\frac{3}{2}$$

C

0

D

$$\frac{-5}{4}$$

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ISRO Scientist or Engineer Computer Science 2009 - Question 51

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The formula $$ P_k = y_0 + k\triangledown y_o + \frac{k(k+1)}{2} \triangledown^2 y_0 + ......+\frac{k...(k + n - 1)}{n!} \triangledown^n y_0 is $$

A

Newton’s backward formula

B

Gauss forward formula

C

Gauss backward formula

D

Stirling’s formula

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ISRO Scientist or Engineer Computer Science 2009 - Question 52

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If G is a graph with e edges and n vertices the sum of the degrees of all vertices in G is

A

$$ e $$

B

$$ \frac {e} {2} $$

C

$$ e^2 $$

D

$$ 2 e $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 53

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Let G be an arbitrary graph with n nodes and k components. If a vertex is removed from G, the number of componentsin the resultant graph must necessarily lie between.

A

k and n

B

k - 1 and k + 1

C

k - 1 and n - 1

D

k + 1 and n - k

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ISRO Scientist or Engineer Computer Science 2009 - Question 54

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A graph in which all nodes are of equal degree, is known as

A

Multigraph

B

Non regular graph

C

Regular graph

D

Complete graph

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ISRO Scientist or Engineer Computer Science 2009 - Question 55

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If in a graph G there is one and only one path between everypair of vertices then G is a

A

Path

B

Walk

C

Tree

D

Circuit

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ISRO Scientist or Engineer Computer Science 2009 - Question 56

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A simple graph (a graph without parallel edge or loops) with n vertices and k components can have at most

A

n edges

B

(n - k) edges

C

(n - k) (n - k + 1) edges

D

(n - k) (n - k + 1)/2 edges

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ISRO Scientist or Engineer Computer Science 2009 - Question 57

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Consider the polynomial $$ p(X) = a_0 + a_1 X + a_2 X^2 + a_3 X^3 $$, where $$ a_i \neq 0, \forall i $$. The minimum numberof multiplications needed to evaluate p on an input is

A

3

B

4

C

6

D

9

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ISRO Scientist or Engineer Computer Science 2009 - Question 58

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Consider the following code written in a pass-by-reference language like FORTRAN.
                          Subroutine swap (ix,iy)
                                     it = ix
                           L1:     ix = iy
                           L2:     iy = it
                              end
                              ia = 3
                              ib = 8
                              call swap (ia, ib + 5)
                              print*, ia, ib
                              end
S1: The compiler will generate code to allocate a temporary nameless cell, initialize it to 13, and pass the address of the cell to swap
S2: On execution the code will generate a runtime error on line L1
S3: On execution the code will generate a runtime error on line L2
S4: The program will print 13 and 8
S5: The program will print 13 and -2
         Exactly the following set of statement(s) is correct:

A

S1 and S2

B

S1 and S4

C

S3

D

S1 and S5

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ISRO Scientist or Engineer Computer Science 2009 - Question 59

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A square matrix A is called orthogonal if A’A =

A

I

B

A

C

-A

D

-I

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ISRO Scientist or Engineer Computer Science 2009 - Question 60

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If two adjacent rows of a determinantare interchanged, the value of the determinant

A

becomes zero

B

remains unaltered

C

becomes infinite

D

becomes negative of its original value.

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ISRO Scientist or Engineer Computer Science 2009 - Question 61

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If $$ \begin{bmatrix}3 & 3 \\x & 5 \end{bmatrix} = 3 $$. then the value of x is

A

2

B

3

C

4

D

5

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ISRO Scientist or Engineer Computer Science 2009 - Question 62

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If A, B, C, are any three matrices, then A’ + B’ + C’ is equal to

A

a null matrix

B

A + B + C

C

(A + B + C)'

D

-(A + B + C)

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ISRO Scientist or Engineer Computer Science 2009 - Question 63

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A

779

B

679

C

0

D

256

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ISRO Scientist or Engineer Computer Science 2009 - Question 64

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Let f(x) be the continuous probability density function of a random variable x. The probability that $$ a < x \leq b,$$ is

A

$$ f(b - a) $$

B

$$ f(b) - f(a) $$

C

$$ \int_{a}^{b} f(x) dx $$

D

$$ \int_{a}^{b} xf(x) dx $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 65

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If the mean of a normal frequency distribution of 1000 items is 25 and its standard deviation is 2.5, then its maximum ordinate is

A

$$ \frac {1000} {{\sqrt2\pi}} e^{25} $$

B

$$ \frac {1000} {{\sqrt2\pi}} $$

C

$$ \frac {1000} {{\sqrt2\pi}} e^{-2.5} $$

D

$$ \frac {400} {{\sqrt2\pi}} $$

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ISRO Scientist or Engineer Computer Science 2009 - Question 66

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If the pdf of a Poisson distribution is given by $$ f(x) = \frac {e^{-2} 2^x}{x!} $$, then its mean is

A

$$ 2^x $$

B

2

C

-2

D

1

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ISRO Scientist or Engineer Computer Science 2009 - Question 67

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Activities which ensure that the software that has been built, is traceable to customer requirement is covered as part of

A

Verification

B

Validation

C

Maintenance

D

Modeling

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ISRO Scientist or Engineer Computer Science 2009 - Question 68

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A Testing method, which is normally used as the acceptance test for a software system, is

A

Regression Testing

B

Integration Testing

C

Unit Testing

D

System Testing

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ISRO Scientist or Engineer Computer Science 2009 - Question 69

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The ‘command’ used to change contents of one database using the contents of another databaseby linking them on a common keyfield is called

A

Replace

B

Join

C

Change

D

Update

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ISRO Scientist or Engineer Computer Science 2009 - Question 70

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A locked database file can be

A

Accessed by only one user

B

Modified by users with the correct password

C

Used to hide sensitive information

D

Updated by more than one user

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ISRO Scientist or Engineer Computer Science 2009 - Question 71

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Whichof the following contains complete record ofall activity that affected the contents of a database during a certain period of time?

A

Transaction log

B

Query language

C

Report writer

D

Data manipulation language

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ISRO Scientist or Engineer Computer Science 2009 - Question 72

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Purpose of ‘Foreign Key’ in a table is to ensure

A

Null Integrity

B

Referential Integrity

C

Domain Integrity

D

Null & Domain Integrity

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ISRO Scientist or Engineer Computer Science 2009 - Question 73

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Which of the following scenarios may lead to an irrecoverable error ina database system?

A

A transaction writes a data item after it is read by an uncommitted transaction

B

A transaction reads a data item after it is read by an committed transaction

C

A transaction reads a data item after it is written by an committed transaction

D

A transaction reads a data item after it is written by an uncommitted transaction

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ISRO Scientist or Engineer Computer Science 2009 - Question 74

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Use of IPSEC in tunnel moderesults in

A

IP packet with same header

B

IP packet with new header -

C

IP packet without header

D

No changesin IP packet

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ISRO Scientist or Engineer Computer Science 2009 - Question 75

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Special software to create a job queue is called a

A

Driver

B

Spooler

C

Interpreter

D

Linkage editor

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ISRO Scientist or Engineer Computer Science 2009 - Question 76

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Process is

A

A program in high level language kept on disk

B

Contents of main memory

C

A program in execution

D

A job in secondary memory

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ISRO Scientist or Engineer Computer Science 2009 - Question 77

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When a process is rolled back as a result of deadlock the difficulty which arises is

A

Starvation

B

System throughput

C

Low device utilization

D

Cycle stealing

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ISRO Scientist or Engineer Computer Science 2009 - Question 78

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On receiving an interrupt from an I/O device, the CPU

A

Halts for a predetermined time

B

Branches off to the interrupt service routine after completion of the current instruction

C

Branches off to the interrupt service routine immediately

D

Hands over control of address bus and data bus to the interrupting device

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ISRO Scientist or Engineer Computer Science 2009 - Question 79

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Compared to CISC processors, RISC processors contain

A

more register and smaller instruction set

B

larger instruction set and less registers

C

less registers and smaller instruction set

D

more transistor elements

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ISRO Scientist or Engineer Computer Science 2009 - Question 80

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Which of the following is/are true of the auto increment addressing mode?
1. It is useful in creating self relocating code
2. If it is included in an instruction set architecture, then an additional ALU is required for effective address calculation
3. The amount of increment depends on the size of the data item accessed

A

1 only

B

2 only

C

3 only

D

2 and 3 only

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