Processor serves the interupt request immediately
Technical Questions
1. A 2MB PCM(pulse code modulation) has
a) 32 channels
b) 30 voice channels & 1 signalling channel.
c) 31 voice channels & 1 signalling channel.
d) 32 channels out of which 30 voice channels, 1 signalling channel,
& 1 Synchronizatio channel.
Ans: (c)
4. What is the max. decimal number that can be accomodated in a
byte.
a) 128
b) 256
c) 255
d) 512
Ans: (a)
7. Line of Sight is
a) Straight Line
b) Parabolic
c) Tx & Rx should be visible to each other
d) none
Ans: (a)
10. The status of the Kernel is
a) task
b) process
c) not defined.
d) none of the above.
Ans: (a)
13 When a 'C' function call is made, the order in which parameters
passed to the function are pushed into the stack is
a) left to right
b) right to left
c) bigger variables are moved first than the smaller variales.
d) smaller variables are moved first than the bigger ones.
e) none of the above.
Ans: (a)
16. Memory allocation of variables declared in a program is
a) allocated in RAM.
b) allocated in ROM.
c) allocated on stack.
d) assigned to registers.
int *p,*q;
p=(int *)1000;
q=(int *)2000;
printf("%d",(q-p));
Ans: 500
Ans. Serial I/O
21. Memory. Management in Operating Systems is done by
a) Memory Management Unit
b) Memory management software of the Operating System
c) Kernel
40.How is memory management done in Win95
Ans. Through paging and segmentation
41.What is meant by polymorphism
Ans. Redfinition of a base class method in a derived class
42.What is the essential feature of inheritance
Ans. All properties of existing class are derived
43.What does the protocol FTP do
Ans. Transfer a file b/w stations with user authentification
44.In the transport layer ,TCP is what type of protocol
Ans. Connection oriented
45.Why is a gateway used
Ans. To connect incompatible networks
46.How is linked list implemented
Ans. By referential structures
47.What method is used in Win95 in multitasking
Ans. Non preemptive check
48.What is a semaphore
Ans. A method synchronization of multiple processes
49.What is the precedence order from high to low ,of the symbols ( ) ++
/
Ans.( ) , ++, /
50.Preorder of A*(B+C)/D-G
Ans.*+ABC/-DG
51.What is the efficiency of merge sort
Ans. O(n log n)
52.In which layer are routers used
Ans.In network layer
53.Which of the following sorting algorithem has average sorting
behavior --
Bubble sort,merge sort,heap sort,exchange sort
Ans. Heap sort
54.In binary search tree which traversal is used for getting ascending
order values--Inorder ,post order,preorder
Ans.Inorder
55.What are device drivers used for
Ans.To provide software for enabling the hardware
56.What is fork command in unix
Ans. System call used to create process
57.What is make command in unix
Ans. Used forcreation of more than one file
58.In unix .profile contains
Ans. Start up program
59.In unix 'ls 'stores contents in
Ans.inode block
(a) sessions layer
(b) application layer
(c) presentation layer
(d) transport layer
Ans: (b)
(a) synchronization
(b) dead-lock avoidence
(c) box
(d) none
Ans. (a)
65.Preproconia.. does not do which one of the following
(a) macro
(b) conditional compliclation
(c) in type checking
(d) including load file
67. Which is not a memory management scheme?
a) buddy system
b) swapping
c) monitors
d) paging
69.Iintegrated check value(ICV) are used as:
Ans. The client computes the ICV and then compares it with the senders value.
72. The UNIX shell ....
a) does not come with the rest of the system
b) forms the interface between the user and the kernal
c) does not give any scope for programming
d) deos not allow calling one program from with in another
e) all of the above
a) init
b) getty
c) both (a) and (b)
d) none of these
Ans. (a)
a) ShowWindow
b) EnableWindow
c) MoveWindow
d) SetWindowPlacement
e) None of the above
Ans. (a)
a) the terminal
b) /dev/null
c) /usr/you/input, /usr/you/output/, /usr/you/error respectively
d) None
Ans. (a)
a) prints lines containing the words first, second or third from the
file /usr/you/myfile
b) searches for lines containing the pattern first in the files
second, third, and /usr/you/myfile and prints them
c) searches the files /usr/you/myfiel and third for lines containing the
words first or second and prints them
d) replaces the word first with the word second in the files third and
/usr/you/myfile
e) None of the above
Ans. (b)
Ans. a ,b ,f
85. Under which circumstance should you create an index on a
table?
a) The table is small.
b) The table is updated frequently.
c) A columns values are static and contain a narrow range of
values
d) Two columns are consistently used in the WHERE clause join condition
of SELECT
statements.
Ans.d
88. A certain radioactive element A, has a half life = t
seconds.
In (t/2) seconds the fraction of the initial quantity of the element
so far decayed is nearly
(a) 29%
(b) 15%
(c) 10%
(d) 45%
90. A radioactive element x has an atomic number of 100.
It decays directly into an element y which decays directly into
element z.
In both processes a charged particle is emitted.
Which of the following statements would be true?
(a) y has an atomic number of 102
(b) y has an atomic number of 101
(c) z has an atomic number of 100
(d) z has an atomic number of 101
92. A man speaks the truth 3 out of 4 times.
He throws a die and reports it to be a 6.
What is the probability of it being a 6?
(a) 3/8
(b) 5/8
(c) 3/4
(d) None of the above
94. Image of point (3,8) in the line x + 3y = 7 is
(a) (-1,-4)
(b) (-1,4)
(c) (2,-4)
(d) (-2,-4)
96. The maximum KE of the photoelectron emitted from a surface is dependent on
(a) The intensity of incident radiation
(b) The potential of the collector electrode
(c) The frequency of incident radiation
(d) The angle of incidence of radiation of the surface
98. When X-Ray photons collide with electrons
(a) They slow down
(b) Their mass increases
(c) Their wave length increases
(d) Their energy decreases
100. How many bonds are present in CO2 molecule?
(a) 1
(b) 2
(c) 0
(d) 4
