Placement Papers - Cisco

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Cisco Question Paper (Digital And Software)

Posted By : Bhuvi Rating : +8, -4
SECTION 1- BASIC DIGITAL SECTION :-   In order to find out stack fault of a three input nand gate how many   necessary input vectors are needed ? What is parity generation ? A nand gate becomes ___ gate when used with negative logic ? What is the advantage of cmos over nmos ? What is the advantage of synchronous circuits over asynchronous   circuits ? What is the function of ALE in 8085 ? A voice signal sample is stored as one byte. Frequency range is 16 Hz to   20 Hz. What is the memory size required to store 4 minutes voice signal? What will the controller do before interrupting CPU? In a normalized floating point representation, mantissa is represented   using 24 bits and exponent with 8 bits using signed representation. What is   range ? The stack uses which policy out of the following-- LIFO, FIFO, Round   Robin or none of these ? Where will be the actual address of the subroutine is placed for   vectored interrupts? Give the equivalent Gray code representation of AC2H. What is the memory space required if two unsigned 8 bit numbers are   multiplied ? The vector address of RST 7.5 in 8085 processor is _______.
Ans. 003C (multiply 7.5 by 8 and convert to hex)
Subtract the following hexadecimal numbers--- 8416 - 2A16 Add the following BCD numbers--- 1001 and 0100 How much time does a serial link of 64 Kbps take to transmit a picture   with 540 pixels Give the output when the input of a D-flip flop is tied to the output   through the XOR gate. How much time does a serial link of 64 Kbps take to transmit a picture   with 540 pixels. Give the output when the input of a D-flip flop is tied to the output   through the XOR gate
Implement the NOR gate as an inverter. What is the effect of temperature on the Icb in a transistor What is the bit storage capacity of a ROM with a 512*4 organization? What is the reason of the refresh operation in dynamic RAMs ? Suppose that the D input of a flip flop changes from low to high in the   middle of a clock pulse. Describe what happens if the flip flop is a   positive edge triggered type?
How many flip flops are required to produce a divide by 32 device ? An active HIGH input S-R latch has a 1 on the S input and a 0 on the R   input. What state is the latch in? Implement the logic equation Y = C^BA^ + CB^A + CBA with a multiplexer.
(where C^ stands for C complement)
Equivalent Gray code representation of AC2H. What does a PLL consist of ?  II - Software Section:-   The starting location of an array is 1000. If the array[1..5/...4] is   stored in row major order, what is the location of element [4,3]. Each word   occupies 4 bytes In a tertiary tree, which has three childs for every node, if the number   of internal nodes are N, then the total number of leaf nodes are Explain the term "locality of reference" ?
What is the language used for Artificial Intelligence
Ans: lisp
What is the character set used in JAVA 2.0 ?
Ans: Unicode
char a =0xAA ;
int b ;
b = (int) a ;
b = b >> 4 ;
printf("%x",b);
What is the output of the above program segment   ?
struct s1 { struct { struct { int x; } s2 } s3 }y; How does one access   x in the above given structure definition ? Why there is no recursion in Fortran ?
Ans. There is no dynamic allocation. What is the worst case complexity of Quick sort?
Ans. O(n2) What will be sequence of operating system activities when an interrupt   occurs ?