Yahoo India :: Placement Paper

Few Questions: (45 min)
1. In a village in each family they give birth to children till they
get a boy. IF girl child they try again. What is the ratio of boys to
girls.

2. 2n+1 numbers in a list except for 1 num all had duplicates, how to
find duplicate in O(n)

3. In 1000 wine bottles stack 10 are poisoned given 10 rats what is
the minimum number of tries to find the poisoned one. Rat dies once it
licks the poisoned wine.

4. Write 1,3,6,4 using +,-,*,/ to get 24 (no repeat of numbers)

5. Which is the DS used in dictionary mode in mobile (t9)

6. Which is DS used for chess program...to predict move each and every
time..

7. There are $1070 dollars how to split them into bags such that asked
for any denomination from $1 to $1070 , u must b able to give without
opening bag...


Another paper:

1. First fit issues...

2. Algorithm to partition set of numbers into two s.t. diff bw their
sum is min and they hav equal num of elements

3. Prog: given Numerator & Denominator.... print 0.3333333333 as .(3)
0.123123 as .(123

MAHINDRA PLACEMENT PAPER

sinhө - hyperbolic
Xn+1 = Xn – f ‘ (Xn) / f (Xn) - - - Newtons Raphson formula
3d3y/dx3 + 7d2y/dx2 - 4 (dy/dx)2 = 4 y2 order , degree
According to Newtonian Law, shear stress is directly proportional to velocity gradient.
in casting molten metal flows through _______. (runner)
welding -> preheating -> why
which one C% is high
28Cr50
40Cr
C35

Spring is not subjected to
Hoop stress
Deflection]
Torsional shear
Transeverse shear>>Ans


Global Warming CO2
Principal Stress = 1000 , -600. What is maximum shear stress
Order of efficiency….. 2 Stroke SI,,,,, 4 Stroke CI
if Inlet air temp increases, efficiency(petrol engine) increases but compressor efficiency decreases - - - True
In SI knocking is reduced due to increase of
Increasing of wall temp
Compression ratio
Supercharge
Engine speed


Specific energy is high?
Turning b. drilling c. grinding d. planning






Match the following
Mohrs circle - Principle stress
Martensite - Hard and brittle Phase
Degree of freedom - kinetics
Section modulus - flexural rigidity
Plastic water bottle - blow moulding


which cycle uses two isentropic and two isothermal processes
dynamic loading which consideration
Elastic limit
Poisson ratio
Yield strength
Endurance limit


A material is loaded still yield point and the load is removed.
Increase in yield stress
Decrease in yield stress
Unchanged yield stress
Reaches UTS


A thin wire is subjected to tensile load. Temperature is same. The resistance_______ (remains constant)
Aeroplane is flying at 800 kmph. Air temp. is zero.
Subsonic
Supersonic
Sonic


match
kirchoff law - electrical circuit
Daltons law - partial pressure
Hooks law - elasticity
Joules law - work equivalent to heat


MAHINDRA
Newton’s Law-Motion

Boy

In a drawer, 5 white socks and 8 black socks are there. To draw one pair of socks, minimum no of socks that has to be drawn? Ans.3
Radius of a cylinder is increased by 30%,then increase in volume will be -------(height is constant).Ans.69%


le’s Law-Pressure and volume relation

Joule’s Law-Mech. Equivalent of heat

Kirchoff’s Law-Electric circuit

Hooke’s Law-Elasticity

Air velocity-Anemometer



Stagnation pressure-pitot tube

Rpm-Stroboscope

Humidity-Hygrometer

Furnace temp-pyrometer



If a body is at -10 degree C(ice) and if it is to be converted into saturated vapour ,how much heat is necessary?



To study:



1. Strength of materials-Bending Moment Diagram,Cantilever beam (Basics)



2. Relative density



3. Natural frequency-spring mass system



4. Heat treatment-very basics



5. Pump efficiency



1. sinhө - hyperbolic



2. Xn+1 = Xn – f ‘ (Xn) / f (Xn) - - - Newtons Raphson formula





3. 3d3y/dx3 + 7d2y/dx2 - 4 (dy/dx)2 = 4 y2 order , degree



4. According to Newtonian Law, shear stress is directly proportional to velocity gradient.





5. in casting molten metal flows through _______. (runner)



6. welding -> preheating -> why





7. which one C% is high

a. 28Cr50

b. 40Cr

c. C35

8.


F







Stress type?

8. What is the type of failure in Key that is used in Flange Coupling



9. Spring is not subjected to





a. Hoop stress

b. Deflection]

c. Torsional shear

d. Transeverse shear>>Ans



10. Global Warming CO2



11. Principal Stress = 1000 , -600. What is maximum shear stress





12. Order of efficiency….. 2 Stroke SI,,,,, 4 Stroke CI



13. if Inlet air temp increases, efficiency(petrol engine) increases but compressor efficiency decreases - - - True





14. In SI knocking is reduced due to increase of



a. Increasing of wall temp

b. Compression ratio

c. Supercharge

d. Engine speed



Specific energy is high?

e. Turning b. drilling c. grinding d. planning

15.

Match the following

a. Mohrs circle - Principle stress

b. Martensite - Hard and brittle Phase

c. Degree of freedom - kinetics

d. Section modulus - flexural rigidity

e. Plastic water bottle - blow moulding



16. which cycle uses two isentropic and two isothermal processes



17. dynamic loading which consideration

a. Elastic limit

b. Poisson ratio

c. Yield strength

d. Endurance limit



18. A material is loaded still yield point and the load is removed.

a. Increase in yield stress

b. Decrease in yield stress

c. Unchanged yield stress

d. Reaches UTS



19. A thin wire is subjected to tensile load. Temperature is same. The resistance_______ (remains constant)



20. Aeroplane is flying at 800 kmph. Air temp. is zero.

a. Subsonic

b. Supersonic

c. Sonic



21. match

a. kirchoff law - electrical circuit

b. Daltons law - partial pressure

c. Hooks law - elasticity

d. Joules law - work equivalent to heat

L&T Infotech placement paper

31st july,2004.......

the pattern is like:
1) branch related ques. 50(30 min)
2) engg. aptitude test 60(40 min.)
3) non verbal ques. 36 (40 min)
mech. ques which i can recall is ...may not be as per the language stated there in paper but it would really help there a lot.....
mech.
1.what is the equivalent spring constant of two srings with k1 & k2 as sring constant connected in series? ans. k1.k2/(k1+k2)
2.by which moulding we produce thermosetting plastics?
3.when air is dirty what will be the injectility of the fuel .................more ?
4.carbon deposits increase the comp. ratio.
5.carbon increases the hardness.
6.hot fluid passes thro the cylinder. by using two insulating material(k,2k)in which sequence may be more effective.......? ( firstk, then 2k matl.)

7.wings of the plane can be made by stretching.
8.what will be the metal removal ratio if the balancings r done at 3000&1500 rpm..
( cent. forces to be considered......ans 1:4)
9.what is cylinder ratio? ans. arrangement of cylinders in which the centre line of crankshaft journal is per.to the plane containing the centrelines of the engine cylinders.
10. In diesel cycle the compression ratio incereases more to expension ratio.
11. In the shm of the ball inside a earth hole passing through the center ,velocity maximum at the center.
12.viscosity of liquid increases with decrese in temprerature.
13. Piezometer measures static pressure..
14. Which iron is used for body construction of machines, gray or white iron ?( not sure)
15.what is core print ?
16. pig iron is manufacture in --------blast furness
17. what is the effect of increase arc lenght in building
18. m 62 indicates ------ 6mm outer diameter & 2 mm pitch
19. what raputre failure.
20 . 6 cylinders in a row , n0. of crancks = 1
21. If in a steam power plant vaccum in condensor reduces what is the effect
22. pressure in industrial pnumatic lines -------5 to 10 bar
23. effect of low temp. ( -20 degree ) on carbon steel .
24.method of hardening of machine guidesways
25. method of joining plastic by welding
26. safe method of loading on a cantileaver
a) UDL b) center point load c) triangular load having zero at center
27. BMD for UDL in cantilever
Ans. parabolic
28. Beams of uniform strenght can be made by
a) varying width b) varying depth c) both d) none
29. which of these not fusion welding process
Ans: spot welding
30. function of stroboscope is
Ans: speed measurement of spur gear
31.if diameter of pully is double how will the design of key way change
32.gray cast iron used for machine parts
33. use of worm gear
34.what will be the diameter of punched hole in punching opereation
a) same as punch b) punch dia + thichkness of sheet
35. this is figure porblem
described as :
there is right anguler wadge with pully at vertex connecting
two equal masses by string one on the sloping side and other
on the vertical side
Questin is what will happen to them
Ans: mass will fall down

essar group placement paper

Placement Paper
Date Conducted: 18 Feb 2007

Paper/Interview:

ESSAR GROUPS PLACEMENT PAPER
AT ANNA UNIVERSITY

The Company procedure is Written Test (Aptitude Test & Technical Test), Group Discussion, Technical Interview and HR Interview. I want to share my experience with you all.
The aptitude test consists of 3 sections – Verbal reasoning, Quantitative Aptitude and Logical Reasoning comprising of 120 questions in 40 questions from each section.

Some of the aptitude questions are:

1. SQRT (156.25) * SQRT (14.25) = 35 * X what is the value of X? X = 1.25

2. A + 8450 ÷ 650 = 13 + A. What is the value of A? A = 0

3. The sum of a number whose ? th is 45. What is the number?
Ans: None

4. The sum of a 2 digit number is equal to the difference between them. Find how many such numbers are possible?
Ans: 10

5. The sum of a 2 digit number is equal to twice the difference between them. Find how many such numbers are possible?

6. 1000.01 – 100.01 – 10.01 = X. what is X? X = 889.99

7. 0.25% of 10 – 10% of 0.25 = 25% of 100 – 100% of X. What is X? X = 25

8. One – fifth of two – third of a number is equal to 24. What is the number?

9. 100$8 – 2$39 = $319. What is $? $ = None of these

10. Ajith and Ajay’s age are in the ratio of 3:5. Two years hence, their age are in the ratio 7:11. What is Ajith’s present age? Ajith’s age = 12.

11. The length of a train is 200m and it crosses a platform of 75m in 15sec. Another train with a length of 180m which is on the opposite direction approaches it. How long it will take to cross the other?

12. (X) – Square, % - Square root, # - Divide, * - Multiply, @ - addition and & - Subtraction. Find the value of

13. Solve 30 – 0.05 *20 +10÷ 5 =?

14. A circle of diameter 28 cm. If there is a rectangle of length 56 cm. What is the value of breadth whose areas are equal? Breadth = 44cm

15. A wheel rotates 18 revolutions in 4.5 sec. What are the revolutions of the wheel per minute? Revolutions = 240

16. Solve: 20% of 60%of a number is equal to 40% of 200. What is the number?

17. 252 x 253 =? 252 + 3

18. Series: 5 5 7.5 15 37.5 112.5 339.75 X

19. Trisha’s monthly salary is 25% more than Krishna’s salary but 25% less than Payal’s salary. Krishna’s annual income is Rs. 1, 20, 000. What is the monthly income of Payal?

20. There is a seven consecutive odd numbers. What is the number greater than 6 and it is smaller than 6?

Technical Aptitude:

1. Work done is Zero for which process?
Ans: Constant Volume

2. Which cycle has high efficiency?
Ans: Otto Cycle

3. The power of 2 –stroke engine varies from 4 – stroke engine by______.
Ans: Twice

4. Sudden reduction in barometer leads to ______.
Ans: Storm

5. Composition of Stainless steel ____.
Ans: Chromium, Nickel …

6. Gears are produced in mass production by ______.
Ans: Hobbing

7. Pick out the wrong statements:
a) The good fuel should have high calorific value
b) Ease in storing
c) High ignition point
d) Low smoke and gases
Ans: (C)

8. Composition of Gun metal _____ .

9. Gears are commonly called with _______
Ans: Pitch Circle Diameter

10. A good fuel should have ________ ignition point.
Ans: Low

11. If heat supplied into the system is 30000 J/S and the power output is 9KW. What is the efficiency of system?

12. A square rod of 2cm x 2cm of which a force of 8800Kg is acting on it. What is the stress developed in it?
Ans: 2200 Kg/cm2

13. GNATT chart shows___________

14. Which is the high efficiency freezing agent?
Ans: Freon 22

15. Property of the freezing agent is:
Ans: Low boiling point and high melting point

16. A diesel engine, that is, slow speed engine follows which cycle?
Ans: Diesel Cycle

17. Hardness is the property of _________.

18. A Rotary compressor depends on ___________.

19. The potential energy raised upwards ___________ the kinetic energy downwards.
Ans: is equal to

20. Centipoise is the unit of ________.
Ans: Dynamic Viscosity

21. For a thermodynamic system, the COP is 5 and the heat supplied to the system is 1 KW. What is the work done?

The technical aptitude questions are given to the students who cleared Aptitude test and it contains 50 questions.
After the Technical Aptitude is over, GD was conducted and the students who are short listed are allowed for Technical Interview and HR Interview

GD topics:

Democracy is the only way to sustain economy growth

Should Indian youth involving Politics

Foreign investment should allow directly to India

Foods come first ethics come later

TV channels can be regional , International

Microsoft Technologies VB .Net Interview Questions

What are collection objects in VB.net ?
VB.Net implements a special object called Collection object that acts as a container for objects of all types. Collection can hold other objects as well as non object data. A Collection has four methods: - Add: This method adds a member to collection. Along with data one can also specify a key value by which the data can be referenced. - Count: This returns the total number of items in the collection object. - Item: Retrieves an item from the collection. An item can be retrieved either using the index or a key if specified. - Remove: Removes an item from the collection. e.g. Dim students As New Collection students.Add (“john”, “1”); //The second argument is a key to object students.Add (“paul”, “2”);

What is the significance of the “finalize” method ?
In order to understand the “finalize” method one needs to understand the concept of garbage collection. The job of freeing up the memory allocated to objects is that of a garbage collector. When the garbage collector determines that an object is no longer referenced it automatically runs a special destructor function called “Finalize”. However we have no way to determine when the garbage collector will call the Finalize method. We can only be sure that it will be called at some time after the last reference to the object is released. Finalize is a protected method i.e. it can be called from the class or derived classes however it cannot be called from outside of the class. If a class has a Finalize method it should explicitly call the Finalize of its base class as well. Overrides Protected Sub Finalize () ‘Cleanup code goes here BaseClass.Finalize End Sub

What are assemblies ? How does one use assemblies in a VB.net project ?
Assemblies are used to specify a logical unit or building block for .net applications. A .net application contains one or more assemblies. Every assembly has version properties that include a major and a minor version, revision as well as a build number. Thus all elements of an assembly are versioned as a unit. The specifications in an assembly are referred as the assembly’s manifest. To use an assembly in VB.Net project one has to follow two steps: - Add a reference of the assembly to the project. A default assembly containing the System namespace is by default added to the project. Access the members or members of the namespace in the assembly using the fully qualified class name.

How does the ‘Err’ object look like ?
Error handling that evolve around the various On Error.. statements are referred to as unstructured error handling. The build in object Err is used in this type of error handling. This object has several properties and methods as listed below: Properties: Description: a short description of the error HelpContext: context ID for the help topic associated with the error HelpFile: fully qualified file name if any Number: Number associated with the error Source: a string that specifies the object that generated the error. Method: Clear: Clears the set values of all properties of the error object. Raise: Generates a runtime error and sets the properties of the Err object to the values supplied in the method call

Have you worked with ADO.net? Can you explain to me in brief ?
Yes I have certainly worked on ADO.Net. ADO.net encompasses two groups of classes: content components and managed provider components. The content components include DataSet class and other supporting classes as DataTable, DataRow, DataColumn and DataRelation. The DataSet class is a lightweight cache of a particular database from the data store. It allows reading and writing of data and schema in XML. ADO.Net involves disconnected datasets because it is geared towards a distributed architecture. All tables and relations in a DataSet are exposed through the DataSet tables and Relations properties. E.g. Using System; Using System.Data; DataSet ds = new DataSet(“MyDS”); Ds.Tables.Add (“Order”); Ds.Tables[“Order”].Columns.Add(“OrderNo” Type.GetType(“System.Int32”)); The DataSet tightly integrates with XML using the methods WriteXml, ReadXml, WriteXmlSchema and ReadXmlSchema

What is the use of namespaces? Can you give me an example ?
The concept of namespaces plays a very crucial role in .net framework. It is a concept parallel to the concept of packages in java. In general, a namespace is a logical grouping of types for the purpose of identification. e.g. let’s say in an organization there are three people with name Paul Smith each individual in a different role and responsibilities. To resolve this ambiguity we can define three namespaces based on their roles as Secretary, Manager and Operator and then reference each Paul as Secretary.Paul and Manager.Paul and Operator.Paul. This is the concept of namespace