HFCL Placement Papers
HFCL CAMPUS TEST [1]
(1) TTL to CMOS pullup & vice-versa
(2) function of Ping
(3) SNMP protocol
(4) Application layer
(5) ## ----> token pasting in C
(6) Question on C: i^=j you have to tell the output given the values of i
and j;
(7) Complexity of Binary Search tree
(8) Macro is given as follows : SQR(x) x*x
find the value of SQR(i-j) , when i and j were given
(9) Multiplexer 1 to 3 inputs--- A,B,C control lines--- S1,S2 Output --- Y
.Write Y interms of S1,S2
(10) Bandwidth minimum sampling theorem
(11) Shannon's Law
(12) Difference between fork() & execve()
(13) Banker's algorithm
(14) append(&struct , fp)
(15) Windows95 , X-Windows what are they?
(16) 16k memory , ending address of the address space FFFFH find the
starting address?
(17) Difference between TCP/IP and OSI model
(18) Difference between Bridge and router
(19) A graph was given : " a qudrilateral with 1 diagonal " find the number
of trees in the graph
(20) Difference between TCP and UDP
(21-23) Pass by reference in C (3 questions)
(24) Synchronisation technique for IPC ( probably which method among the 4
choices was best was asked)
(25) Address of RST 6.5
(26) Preorder Traversal
(27) Infix to Postfix
(28) What data structure is used to transform infix to postfix?
(29) 4 bit computer , size of ROM given , output of ROM gives the address ,
design a mod-n counter
(30-31) FIFO , LRU page trace
(32) How many flip-flops in MOD-33 counter?
(33) printf("\nab\bcd\ref");
(34) doorom hello test
find argc and argv
(35) call main()
main()
{
toupper("Hello");
main();
}
what does this piece of code does?
(36-39) 4 question from Understanding Pointers in C on Pointer , Array , all
from exercise in the book
(40-41) 2 questions on precedence rule
HFCL CAMPUS TEST [2]
(1) ICMP protocol which layer?
(2) Ping - which protocol implemented?
(3) FTP - which protocol implemented?
(4) What kind of handshaking is used in TCP/IP?
(5) IP addressing ClassA , ClassB , ClassC
(6) End to end error correction is done by which layer ?
(7) Question on address bus and data bus ALE
(8) 16 bit address bus and 8 bit data bus , how much memory can be
interfaced ?
(9) 1 bit opcode , (n-1) operand , find the length of Program Counter
(10) 4 bit ROM
(11) What is the benefit of memory interleaving ?
(12) How many maskable and non-maskable interrupt in 8085
(13) RISC what kind of Control Unit is implemented ?
(14) In Pipeline architechture , what is the value of CPI (Cycles Per
Instruction)
(15) Where TLB is used?
(16)
struct a
{
char b[7];
char *s;
};
struct b
{
char *t;
struct a y;
};
struct b q={"Raipur" , "Kanpur" , "Jaipur"};
printf("%s %s" , q.t , q.y.s);
printf("%s %s" ,++q.t , ++q.y.s);
Find the ouput
(17) Heapsort worst case complexity
(18) Binary search complexity
(19) Where far pointer is used?
(20) Why address of operator(&) cannot be used on register variables?
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