Placement Papers - VeriFone

VeriFone Systems Inc.
Verifone Test Paper Pattern
Posted by :
Arun kumar S

Verifone test Questions :
 There are two parts :
Note:  The Answers given here are what i wrote, May not be correct. 

 1. Aptitude test : 15 Minutes, 20 Questions
eg. Product of three consecutive nos. 210. What is the sum of two least numbers?
ans.: 5 * 6 * 7 = 210 , sum = 11 is answer

eg. If the area of the sqaure is increased by 69 % how much the length of the side will increase?
ans.: 13 (i think)

eg. if the sum of five consecutive nos. 35? how many prime nos are there :
ans: 5 + 6 + 7 + 8 + 9 = 35 so two primes

eg. if the length of the rectangle is reduced by 20% and breath is increased by 20 % what is the net change ?
ans.: 4 % decrease

2). Electrical & Electronics : 15 Questions and, nand...circuit realted stuff, ...
   Data Structures, Algo., & Complexity theory : 5 questions

a. if W is a sequence of strings without a and W\' is its reversal then WaW\' is generated by:
ans. i think Context Free Grammmars

b. Whether all recusive pgm can be writtten iteratively?

c. What data structes you will use if you want to go to first record from the last and vice versa? 
ans.: doubly linked circular list

d. Given 10000 nos. and 48MB Memory. What is the complexity of the efficient sorting algo.? (the algo. is not mentioned)

e. Given a C code and ask what it does? I think the code was something similar to Bubble sort and that particular code does the sorting in Desending order and the complexity is O(n^2)(which is the next question).

3. OS : 5 questions
a. If there are too many page faults what is the problem?

b. To ensure one pgm. doesnt corrupt other pgm. in a Multi-pgm. enviornment what you should do?

c. Which one you will use to implement critical section? Binary Semaphore

d. Which one is not needed for Multi-pgm. enviornment? options are: virtual memory,security,time sharing,none of the above.

4. Networks and Hardware: 5 questions
a. Which one is not done by Data link layer ? bit stuffing, LRC,CRC,parity check

b. Which one is not related to Data link layer?

c. Which one is not suitable for client-server application? tcp/ip,message passing,rpc,none of the above.

5. Databases and Misc.: 5 questions
a. What SQL .................. (not the expansion)

b. Indexing in databases give you ............

6. C Pgm. : 5 questions
1. int a=1,b=2,c=3;
What is the output?

2. for(i=0; i<=10;i++,printf("%d",i); +- (+- is there in the questions)

3. Scope of Static Variable ............

4. Given a C code and what is the output?