Company: Flextronics Software Systems

Hai all,
Here is the Hughes Paper( now FLEXTRONICS). There are two sections of the written test. First is the general aptitude test(30 ques) (generally it is the quantitative aptitude . R.S. Agrawal (non-verbal and quantitative) should be done.
Second is the technical section(u can attempt either electronics or computer one). There are good C, C++, Java questions in the Computer section and microprocessor, computer architecture and C, Java questions in Electronics section. They declare the result within an hour or two. Then the interview is as per the schedule. The interview is the technical one. They ask C, C++, datastructures questions and final year project in detail. It consist of two section part A and B or C
For CSE student part A & B is better.
Here i am writting some Questions from part A and B for CSE student
Questions are not in order.
***************************************************
1.
f(char *p)
{
p[0]? f(++p):1;
printf(“%c”,*p);
}
if call that fuction with f(Aabcd) what is the output??
ans:dcbaA (Just reversing the string

2
f(char *p)
{
p=(char *)malloc(sizeof(6));
strcpy(p,”HELLO”);
}
main()
{
char *p=”BYE”;
f(p)
printf(“%s”,p);
}
what is the o/p???
ans:HELLO

3 To sorting array of 10 elements which sorting is best
a)slection
b)bubble
c)tree sort
d)….
ans:a

4 To saving space paoint of view which sort is best
a)selection
b)insertion
c)both a & b
d)… check it once.U Can easy Aanswer this question(UCA)

5 Which statement is wrong on heap
a)Any two childs should not same
b)..
c)..
d)…
ans:a

6 one more question on heap

8 how many null pointer are there in N number binary tree
ans:N+1

9 Two sorted list of size n what are the maximum comparison in merge
ANs:2n-1

10 converting 41.685 to binary

11 pc is incremented while executing ———- instruction
ans:fetch instruction

12 this is gates (NAND)problem
It means some gate figure has given with all NAND gate we have write
equavalent gate
ans:OR gate

13 x:validating :Are we producing product right
y:verification:Are we producing right right
a)X is wrong statement
b)y is “
c)x and Y “
d)x & y is right statement

14 NFS some queston in NSF.
see distibuted operation System book by tenaun bamab

15. IP & IPX is implemented in trasport layer.All our friends can answer this question .Here i am unable to recall that question.

16 comparison between hashtable and binary tree
ans:a

17 client server is working in asyn mode then how communication will take place bt client and server.

18 once context swithing occures then ————will take place
a)saving register b)saving stack c).. d)..

19 If precondition is failed what u say about postcondition?

a)checking the class structure.. b)..c).. d)..

21 Strings in Java
a)Mutable b)variable length string c).. d)..
ans:b

22 in Internet Transprot layer which is not a protocol
a)/etc/host b)TCP c)UDP d)..

23 Which is not specified in CODD’s rules

It is from DBMS question
Refer NAVATHI BOOK chapter -9 appendx topic is CODDE’s rules
24 what is the use of Normalization

25 Functional dependecy x->y is shows that
a)if x1=x2 then y1=y2 b).. c).. d).. ans:a

26 one question on IP addsress 243.65.77.8 some thing

27 If A sends a message to B with encryption then key is
a)A public key b)B public key c)A private key d)B private key ans:b

28 In a class only declaration of the function is there but defintion is not there then what is that function
ans:virtual function

29 what is not necessary condition in dead lock
ans:a

30 One question from multible inheritance…

31) ICV protocal

32) one question from catches like write-through protocal etc

33)catche access time is 100ns ,memory access time is 1000ns and hit ratio
is 0.9 then what is average memery access time
a)100ns b)200ns c)400ns d)500ns ans:b
***********************************************************************

SECTION C:
1.an lead compensator zero is at Z=Zc, pole is at P=Pc then the following is correct

Q.1 void x(char* a) { (a[0])?x(a+1):1; printf(“%c”,*(a+0)); return 1; ..; } Input string ‘a’ is assigned as AaBbCc , what is the output? Ans.-cCbBaA

Q2 a question on digital gates ANS is OR gate.

Q3 what is the binary representation of 41.6785

Q4 if the precondition for a subroutine does not hold then 1.postcondition does not hold 2.postcondition may or may not hold 3. ? 4. ?

Q5. In java 1. java strings are mutable. And some other options on java strings

Q6. Void f(char *p) { p = (char*)malloc(6); strcpy(p,”hello”); } void main( ) { char *p = “BYE”; f(p); printf(“%s”,p); } ANS BYE

Q7. A question on write through and write back algo.

Q8. What is concerned with transport layer. Ans PORT.

Q9. A server can work with ip and ipx protocol.how the server will determine to which protocol the incoming packet coresponds .

Q10. For which purpose dhcp is used ANS ip address

Q11 global vaariable defined as ststic will serve the purpose of —

Q12 Question on NFS ANS It uses the same semantics as unix for file system

Q13. Program counter is incremented typically in which uses ANS fetch

Q14 NO of NULL pointers in a tree with n leaf nodes ANS N+1 Q15.thread take less time than process context Why? Ans. Address space is same.

Q.16 Which algo is best for sorting 10 elements? Ans. 1> binary tree 2> selection 3> bubble 4> none

Q.17 a question on ICV(networking)
a) When A sends an ICV and message, B computes ICV , checks It with given
ICV,and decodes Message
b) Similar other

Q.18 When server A sends a time request to server B, (time synchronization), and response becomes past, What does A do?
a) resets its own clock
b) resends time request again

Q.19 in public key encryption what does A do such that It is not visible to others?
a) A uses public key part of A
b) A uses private key part of A
c) A uses public key part of B
d) A uses private key part of B

Q.20 function dependency can be described as:

Q.21 q. on findind cyclometric complexity of the given program
1> 7 2>5 3> 4 4> 0

Q.22 Codd’s rule related to database

Q.23 path testing comes under
A) white box
B) black box

Q.24 when an ip address is not in the computer adresss resolution file what does It do with that packet
a)Ignores It
c) sends It to default gateway
d) sends It to ethernet server

Q.25 execution divided in different stages then this is called ANS. Pipelining

Q.26 in C the macros are
ANS. converted in to inline code during preprocessing

Q.27 X: verification means doing the right things Y: validation means doing things right
a) both true
b) both false
c) one true one correct

Q.28 void insert (key, r)
Keytype key, data
{
if (n>=max)
ERROR
Else
R[n++].key=k;
Which is best?
1> sequential search

Q.29 which is best for associative list searching?
3) hash table

Q.30 A question based on SQL ?
Q.31 which is not necessary condition for deadlock?
1> mutual exclusion
2> no preemption
3> is ANS.
4> Circular wait

/=====================================
From Venky..

1. a processor has two level cache.Their access time (level1 and level2) is 100ns and 300ns respect.Memeory access time is 1000ns\$
==> ans is 140 (b)
==> 2.diskless server uses
==> a rarp
==> b arp
==> c ftp
==> d.telnet
==> ans rarp
==> 3.which one of them is not a client server
==> e-mail
==> telephone
==> webserver
==> and one more
==> ans is e-mail or telephone.
==> 4.Which one is used to represent operations
==> infix
==> postfix
==> binarytree
==> and one more
==> ans binary tree
==> 5.one qustion was on private key and public key.The quest. was
if a wants to send a message to b that no one other that b should \$
==> A private key
==> A public key
==> B private key
==> B public key
==> 6.compliers maintain
==> ans is symbol table
==>

From Diwakar..
1) what a java interface not have ?
ans – instance variables
2) what is done with java code on a web-page
3) what is the order of deleting a node from a linked list given a ptr to it
ans O(n) ( since u have to traverse the list to reach the prev. node)
3) what is RSA
4) how can A send a messageto B so that B knows its from A
ans A uses his private key so that B can use A’s public key
5) what is the best sort in worst case
ans heap sort
6) what is the given sorting
ans selection ( check it )
7) what can access protected memebers of a class
ans other classes of that program
8) what protocol is used by a machine to map an ip to hardware address
ans arp
9) what is the size of ipv6
ans 128 bits
10) what protocol has ping
ans icmp
11) how many keys are needed in symmetric and asymmetric crptography?
12) one on a right threaded tree
13) very easy k-map
ans i think its b)
14) very easy ckt
ans choice which has option : a&c are equivalent
15) what in unix doesnt have a fd
ans process ( this was the first ques ).

Regarding Hughes
paper they conducted two tests. Both were technical(no aptitude test). First one was compulsory for everybody. In second one could opt for electronics or computers. In all i suppose there were 50 questions. And just before interview you were supposed to fill up a performa which they call Behavioural Test. This was to check you interpersonal skills and socialising capabilities. Questions like – would you like to be elected leaders of organising committees, do you like peoply express their agonies to you, do you wish people be close to you type questions were repeated in one and the other form.

Interview was technical as well as personal. CGPA did count – it seems.
They selected 8 people from here. BTW what’s your current CGPA and what’s
the strength of your class. Do they come for B.Tech and M.Tech separatel
as the case here is or it’s all at once.

Questions :

1.If a precondition of a sub routine fails then
a. post condition fails as well
b. Post condition may fail
c. post condition is declared but now defined.

2. whatz the o/p of the following program
char * a= “AabbCc”;
void x(char *a)
{
a[0] == 0 ? x(a+1):1;
printf(“%c”,*a);
return 1;
}
x(a);
a. AaBbCc
b. cCbBaA

3. What is DHCP used for?

4. There are 2protocols IP and IPX are running on top of Ethernet. Suppose
a packet addressed to that ethernt card arrives, to which protocol the
ethernet sends the packet?
1. It checks the payload of the frame and finds out the protocol type and
despatches it to the right protocol
2. It fins out the protocol type that is mentioned in the ethernet frame.
3. despatches to both the protocol

5. What is the use of global static variable in C?

6. In which stage of the compilation the Macro in C are converted into
Iline code? (this is not the exact Qn a slight variation of it)

7 In the IP/Ethernet network, a packet with destination address
192.32.65.70 arrives and there is no entry for this address in the routing
table of the m/c? what does the m/c do about the packe
b. Brodacasts into the ethernet.
c. sends to default router

8. in Public key Encryption , if A wants to send a encrypted msg to B then
A encrypts the message with
a. A’s public key
2. A Pvt key
c. B’s public key
d. B’s Pvt key

9. consider the SQL statement “Create table New as select * from oldtable”
a. the sql stament is a correct one
b. New is reservd word there is an error
c. you can’t select anything while creating a table

10. By Codd’s defn for RDBMS whih one is not right?
options , I don’t remeber

11. If X and Y are two attriubutes of a relation and 1 and 2 be any two
tuples in that relation
Y is fuctionally dpndant on X iff (X->Y)

a. if (x1 == x2) then y1==y2
b. if (x1==y1) then x2 == y2
someother combinations

12.The normalization process
1.reduces the data redundancy
2.It reduces the inconsistency that arises due to the data redundancy

13. ((A nand A) nand (B Nand B)) = ?
a. A+B

The question was not exactly in this form. gates represented pictorilly

14. whtz the purpose of flow control?
1. to control errors
. to control congession the receiving end
3. to sequnce the out of sequence packets

15. Whic is false about Java strings
1. The are Null terminated
2. Set of Chars
3. The Condition checking == and = on a sme pair of strings gives
different results.

Don’t remeber the options
it’s went something like this:
1. checks the magic nubmer

17. Whatz is the Cyclometic complexity of the following code
don’t remember the code exactly

Some more questions..

1:a machine A wants to set it’s time same as a a machine B so it sends a packet to B and b sends reply.but the time on packet is over by the timete packet reached A.A has to
a1:set the time on packet
b2:increment its time slowly so as to reduce deifference
c:send packets repeatedly till it gets a packet with time less tan the current time

2.which of the following protocols does not find mac address given internet address
a>arp
b.rarp

a.the byte verifier checks the magic number

4.when A wants to send a mesg to B using Public key cryptography he uses
a.A’s public key
b.A’s private key
c.B’s public
d.B’s private

5.how does a string in java differ from that of c/c++
a1.java strings are mutable
b.java strings does not have a �

6.given str=”AaBbCc”and a small c program something like a:b:( )
the program actually reverses the string recursively

7.some protocol SHDC

8.NFS server is similar to
a.provides similar sevices as unix
b.a file trans fer..
c.just gets the file for reading..

9.an address 202.15.46.45 is to be located.the machine does not have
info about 202.0.0.0 or 202.15.0.0 0r 202.15.46.0
so the DNS server willl now
b.send the mesg to a default server if available
c.send mesg to a DNS server if available
d……

10.verification:”are u building the right product”
validation:”are we building the product right”
a.both are wrong(ans)
b.both are correct
c.first wrong second correct
d.first correct second wrong

11.A:”cohesion is a desirable property”
B:”cohesion means the property that the entire unit is one..”
a.both are correct
b.both are wrong
c.first wrong second correct
d.first correct second wrong

12:definition of functional dependency.

13:which of the following does not use extra memory
a..
b.insertion sort
c.shell sort
d.both b and c.

14:which of the following is better for ten elements
a.bubble sort
b.selection sort
c.quick sort
d..

15.the memory reference time for cache is 100 ms and for memory is 1000ms
.the probalility of a hot is .9.the average memory access time is
a:100
b:200(ans)
c:500
d:1000

16.a question on socket numbers

17there is an ordered binary tree and an index structure
a.we can use ordbintree without ordering
b.orb are used with ordering where as indexing canbe done without ordering
c.indexing uses extra memory
d..

18.there is ethernet protocol and ethernetIPstack in MAC sublayer
when an address has to be found which is use

It has got a PC, register space kind of options.

A question on NFS.
b. it is just like Unix file system.
c. After the file is opened, the whole file os transferred to the client
d. there is no state information maintained.

What takes maximum time in a context switch.
a. saving registers.
c. flushing the TLB
d. getting the new process inside the memory.

1.If a precondition of a sub routine fails then
a. post condition fails as well
b. Post condition may fail
c. post condition is declared but now defined.

2. whatz the o/p of the following program
char * a= “AabBCc”;
void x(char *a)
{
a[0] == 0 ? x(a+1):1;
printf(“%c”,*(a+0));
return 1;
}
x(a);

a. AaBbCc
b. cCbBaA

3. What is DHCP used for?

4. There are 2protocols IP and IPX are running on top of Ethernet. Suppose
a packet addressed to that ethernt card arrives, to which protocol the
ethernet sends the packet?
1. It checks the payload of the frame and finds out the protocol type and
despatches it to the right protocol
2. It fins out the protocol type that is mentioned in the ethernet frame.
3. despatches to both the protocol

5. What is the use of global static variable in C?

6. In which stage of the compilation the Macro in C are converted into
Iline code? (this is not the exact Qn a slight variation of it)
pre-processing stage.

7 In the IP/Ethernet network, a packet with destination address
192.32.65.70 arrives and there is no entry for this address in the routing
table of the m/c? what does the m/c do about the packe
b. Brodacasts into the ethernet.
c. sends to default gateway
d. sends to the server

8. in Public key Encryption , if A wants to send a encrypted msg to B then
A encrypts the message with
a. A’s public key
2. A Pvt key
d. B’s Pvt key

9. consider the SQL statement “Create table New as select * from oldtable”
a. the sql stament is a correct one
b. New is reservd word there is an error
c. none
d. new should come within quotes.

10. By Codd’s 14 rules for RDBMS whih one of following is not right?
a. null values r not defined.

11. If X and Y are two attriubutes of a relation and 1 and 2 be any two
tuples in that relation
Y is fuctionally dependant on X iff (X->Y)

a. if (x1 == x2) then y1==y2
b. if (x1==y1) then x2 == y2
someother combinations

12.The normalization process
1.reduces the data redundancy
2.It reduces the inconsistency that arises due to the data redundancy

13. ((A nand A) nand (B Nand B)) = ?
a. A+B

The question was not exactly in this form. gates represented pictorilly

14. whtz the purpose of flow control?
1. to control errors
. to control congession the receiving end
3. to sequnce the out of sequence packets

15. Whic is false about Java Back