Infosys Sample Puzzles

7 questions
1) Eight friends Harsha, Fakis, Balaji, Eswar, Dhinesh, Chandra, Geetha, and Ahmed are
sitting in a circle facing the center.
Balaji is sitting between Geetha and Dhinesh. Harsha is third to the left of Balaji and
second to the right of Ahmed. Chandra is sitting between Ahmed and Geetha and Balaji
and Eshwar are not sitting opposite to each other. Who is third to the left of Dhinesh?
Answer: Fakis
Explanation: Arranging the friends as per the question statement we can arrive at the following
diagram
Ahmed
Fakis Chandra
Harsha Geetha
Eswar Balaji
Dhinesh
Hence correct answer is Fakis.
2) A fast typist can type some matter in 2 hours and a slow typist can type the same in 3
hours. If both type jointly, in how much time will they finish?
Answer: 1 hr 12 min
Explanation : The fast typist's work done in 1 hr = 1/2
The slow typist's work done in 1 hr = 1/3
If they work jointly, work done in 1 hr = 1/2+1/3 = 5/6
So, the work will be completed in 6/5 hours. i.e., 1+1/5 hours = 1hr 12 min
3) Today is 4.11.09. Keeping that figure 41109 in mind, i have arrived at the following
sequence: 2, 1, 9, 5, _ Which of the following four numbers can fill the dash?
Options
a) 7
b) 65
c) 4563
d) 262145
Answer : 41109
1^4 + 1 = 2
1^1 + 0 = 1
0^1 + 9 = 9
9^0 + 4 = 5
So next is 4^9 + 1 = 262145
4) Let S be a Set of some positive integral numbers; with an average of 47; and containing
the number 83. The numbers may or may not be distinct .However ; when the number 83 is
removed ; the Avg drops to 46 .What is the largest number that can be possibly contained
in that Set ?
Solution:
Let S be the sum of that set of n positive integers. S/n = 47
(S - 83)/(n - 1) = 46
Solving the above 2 equations, we get S = 1739; n = 37.
This set of 37 positive integers contains 83. To get to the expected answer, we have to
Suppose that 35 of the remaining 36 integers has a value of 1 each (least +ve integer).
Thus, the largest possible integer in the set = 1739 - 83 - 35*1 = 1621
5) Sum of squares of two numbers 'x' and 'y' is less than or equal to 100. How many sets
of integer solutions of 'x', 'y' is possible?
Answer: Total 317 solutions
Explanation:
x = 0, |y| <= 10 -> 21 solutions
|x| = 1, |y| <= 9 -> 38 solutions
|x| = 2, |y| <= 9 -> 38 solutions
|x| = 3, |y| <= 9 -> 38 solutions
|x| = 4, |y| <= 9 -> 38 solutions
|x| = 5, |y| <= 8 -> 34 solutions
|x| = 6, |y| <= 8 -> 34 solutions
|x| = 7, |y| <= 7 -> 30 solutions
|x| = 8, |y| <= 6 -> 26 solutions
|x| = 9, |y| <= 4 -> 18 solutions
|x| = 10, y = 0 -> 2 solutions
6) There is a unique number of which the square and the cube together use all ciphers
from 0 up to 9 exactly once. Which number is this?
Answer: The number is 69.
Explanation:
69^2=4761 and 69^3=328509..
7) You are standing next to a well, and you have two jugs. One jug has a content of 3
litres and the other one has a content of 5 litres. How can you get just 4 litres of water
using only these two jugs?
Solution:
Fill 3 litre jug pour to 5 litre jug
Fill again 3 litre jug and add to 5 litre jug then 1 litre will be there in 3 litre jug
Pour all water outside from 5 litre jug
Fill 1 litre water from 3 litre jug to 5 litre jug
Fill 3 litre jug and add to 5 litre jug making it 4 litres of water.

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Wipro Sample Technical Aptitude

4 questions
1) A 2 mb PCM (Pulse Code Modulation) has
Options
a) 32 voice 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 and 1 synchronization
channel.
Answer : 31 voice channels & 1 signalling channel
2) Word alignment is
Options
a) aligning the address to the next word boundary of the machine
b) aligning to even boundary
c) aligning to word boundary
d) none of the above
Answer : aligning the address to the next word boundary of the machine
3) To send a packet data using datagram, when a connection will be established
Options
a) before data transmission
b) connection is not established before data transmission
c) no connection required
d) none of the above
Answer : no connection required
4) The status of the kernel is?
Options
a) task
b) process
c) not defined
d) none of the above
Answer : Process

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HCL Sample Technical Questions (DBMS)

8 questions1) Atomicity is _____
Options
a) Either all actions are carried out or none are. Users should not have to worry about the effect
of incomplete transactions. DBMS ensures this by undoing the actions of incomplete transactions.
b) A concept which is used to model a relationship between a collection of entities and
relationships. It is used when we need to express a relationship among relationships.
Answer : a) Either all actions are carried out or none are. Users should not have to worry
about the effect of incomplete transactions. DBMS ensures this by undoing the actions of
incomplete transactions.
2) The phase that identifies an efficient execution plan for evaluating a query that has the
least estimated cost is referred to as___.
Options
a) Query optimization
b) Query String
Answer : a) Query optimization
3) Expansion of DDL is _____.
Options
a) Data Description Language
b) Data Definition Language
c) Data Degree Language
Answer : Data Definition Language
4) A collection of conceptual tools for describing data, data relationships data semantics
and Constraints is called as_____.
Options
a) Data base
b) Table
c) Data model
Answer: Data model
5) ______ is copying the three sets of files (database files, redo logs, and control
file) when the instance is shut down. This is a straight file copy, usually from the disk
directly to tape. You must shut down the instance to guarantee a consistent copy.
Options
a) cold backup
b) hot backup
c) Armstrong Rules
Answer: cold backup
6) _______ is a program module, which ensures that database remains in a consistent
state despite system failures and concurrent transaction execution proceeds without
conflicting.
Options
a) Transaction manager
b) File manager
c) None of these
Answer: Transaction manager
7) _______ is a program module that provides the interface between the low-level data
stored in database, application programs and queries submitted to the system.
Options
a) Buffer manager
b) Storage manager
C) None of these
Answer : Storage manager
8) A _____ with respect to DBMS relates to user commands that are used to interact with a
data base.
Options
a) Connection string
b) Query String
c) Query
Answer : Query

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