L&T PLACEMENT QUESTIONS

                                     L&T PLACEMENT QUESTIONS

L & T Infotech  

1. a( [ B ( [A^ C]]
where '(' and '^' are symbols related to SET and '^' is not exact symbol , it is curved not conical(due to limitation of key board ), represents"union" 
a. has no sense
b.It is associative as well as commutative 

2.2's complement of given Binary number 

 3. Octal Equivalent of a Binary number

4.Given -- 
Ac + AB + BC = 
a. AC
--     
b. BC+AC 

5. Question related to linked list Given a program coding in C++ and asked what it is doing.class definition not given
choices were a. Deleting a node
b. Adding a node at head
c. Adding a nde at end
I think it is adding a node at the head of the node.  
Note:You must go through linked list verywell both class definition and program to adding the node ,deleting the node ,
initialising the linked list etc..

6.Some Questions related to data structures like traversing through
QUEUE
TREE etc. 
7.Evaluate given polish prefix expression ( i am not remembering the expression)

8. LIST| Sort | MORE
a. Lists the files after sorting and diplay "more"
b. List or sort the file and ask for any more files
( I do remember only these two choises ) 

9. Copy QUEUE/SORT TXT.axb QUEUE/AJITH
cd QUEUE/AJITH
ren TXT*.AXB TXT*.ayb
DEL *.ayb
DIR 
What are the files listed?
choices
a. only '.' and '..'
b. all files starting TXT
c. No files listed  

10. 1 simple question from COBOL 
a) What is reverse engineering.
b) Octal of some binary number(comes to 165 in decimal after
conversion).
c) A cobol prog with an integer array(I guess coz i did not have
Cobol in my syllabus).           
d) A problem on Depth first search(very simple).
e) Question on Grammar's frm Theory of computer science.
f) Something like Select the correct option when
A Subset of (B Subset of ( A Intersection B)
if B is completely contained by A.
g) A question on memory(quite simple).
h) A couyple of questions on C(one on pointers).
These r all I can remember.

PART 1:-> EKT(Engg Knowledge test) [technical] -Concentrate more on datastructure like sorting methods thier timings,Simple unix command like touch, simple C programs on strings.. The EKT test consisted of 40 objective type questions which we had to solve in 40 minutes.A majority of the questions were based on Mathematical Logic such as "reflexivity", "tautology","p^q->r" etc.The technical paper usually contains questions related to data structures, operating systems,c,c++,unix and many more comp.sci dept.The technical paper usually contains questions related to data structures,operating systems,c,c++,unix and many more comp.sci dept.It also contains questions from COBOL, LISP, C, Discrete Structures, Databases etc.There is a question on finding the hamming code. Some Questions : 1) what is a smith chart used for 2) how is impedance matching done and why do we need it (basically can talk about ideal power supply needing a low internal resistance and high load to function properly. so one stage of transistor amplifier has to have low o/p resistance and high i/p resistance for next stage- do look up all basic electronics) ( also about sinking high currents without damage) 3) name all flipflops u know and working esp. master slave. 4) c progaming - program to find how many 1's are present in an integer variable using bitwise operators. something about dynamic allocation, static functions, macros 5) c++ virtual functions 6) what types of control r there 7) QPSK ------------------------------------------------------------------------------------------------------------------------ 1. what is an inode in unix? 2. small program in pascal to add a node to a linked list. (You have to tell what the program does) 3. C strcmp program (You have to tell what the program does) 4. set of dos commands testing basic familiarity with dir, ren *.t?t, cd etc. 5. what is the order of binary search? 6. what is the order of strassens matrix multiplication? 7. you have to maintain the sorted order of integers and insert integers . which data structure would you use? (tree, list, queue, array?) 8. There are two lists of integers to be merged. Which method would you not use? 9. In an online database system when is data written to disk? (on pressing enter, when commit or update is encountered, at end of data, all of the above) (was clueless! ) 10. Small prolog function which prints 2345true. You need to tell output. 11. Convert this binary into octal. 010 100 101 12. Lisp program given. what does it do? (GCD, LCM, Multiplies mxn?) 13. What is paging? 14. what is segmentation? 15. 2/3 questions on equivalence class, associative and commutative properties. 16. question on poset. 17. one figure given, give regular expression for it (very basic) -------------------------------------------------------------------------------------------------------------------------- PART 2:-> The second part is of 30 minutes and covers various (IMHO irrelevant) topics. Some more questions. Remember all are multiple choice questions with either 4 or 5 options so you have at least a 20-25% chance of being right even if you are clueless. No negative marking. Determining the next figure 3X3 matrix.They willnot give any example problems.U Have to find ur way. Prepare well in that Go through RS Agarval Verbal and non verbal reasoining and in reasoning there was only one kind of questions. That is, find the next match among a group of figures. Figure matrices: In Figure Matrices, 9 figures are arranged in the form of a matrix with one figure missing and the candidate is required to analyse the the complete sets, find out the common rule and then on its basis, find the missing figure in the incomplete set.It consisted of 36 questions on figure matrices which we had to solve in 30 minutes. The questions were easy but generally you don't get time to solve each and every problem

PAPER: LnT  PLACEMENT PAPER (TECHNICAL & APTITUDE)

Aptitude:

Q1. Cost of an item is x. It's value increases by p% and decreases by p% Now the new value is 1 rupee, what is the actual value ?

Ans.(1000)/(1000-p*p).

Q2. A right circular cylinder and a cone are there. Base radius of cone is equal to radius of cylinder. What is the ratio of height to slant side if their volume are the same?

Q3. Distance between two poles is 50 meters. A train goes by 48 at a speed of kmph. In one minute how many poles will be crossed by the train ?

Q4. A pole seen from a certain distance at an angle of 15 degrees and 100 meters ahead by 30 degrees. What is the height of pole ?

Q5. For 15 people--each has to pay Rs.20.For 20 people--each has to pay Rs.18. For 40 people--how much has each to pay ?

Q6. If p=2q then q=r*r , if p-odd then q is even, whether r is even or odd ?
a) first condition is sufficient
b) second condition is sufficient
c) both are sufficient
d) both are not sufficient

Q7. If A occurs which of the following must occurs
I. F & G
II. E and H
III. D

(a) I only
(b) II only
(c) III only
(d) I, II, III
(e) I, II (or) II, III but not both

Ans. (e)

Q8. If B occurs which must occur

(a) D
(b) D and G
(c) G and H
(d) F and G
(e) J

Ans. (a)

Q9. If J occurs which must have occurred

(a) E
(b) either B or C
(c) both E F
(d) B
(e) both B and C

Ans. (b)

Technical:

Q1. What is the ideal op-amp CMRR ?

Ans. infinity.

Q2.For a 13-bit DAC the MSB resistance is 2kohms. What is the LSB resistance ?

Ans. 2kohms * 2 12

Q3. The layer in the OST model handles terminal emulation
a) session
b) application
c) presentation
d) transport

Ans. (b)

Q4. Long int size is
a) 4 bytes
b) 2 bytes
c) compiler dependent
d) 8 bytes

Ans. (c)

Q5. Find the output of
x=2,y=6,z=6
x=y=z;
printf("%d",x);

Q6. FTP is carried out in ___________ layer ?

7. in diesel engine the comp. ratio is ______ then expansion ratio(more,equal,less,...)

8 . carbon help in the improving __ of steel(ductility,malliability,hardness,machinability)

9. pig iron is manufacture in --------blast farness

10. what is the effect of increase arc lenght in building

11. m 62 indicates ------ 6mm outer diameter & 2 mm pitch

12. what rapture failure.

13 . 6 cylinders in a row , n0. of crancks = 1

14. If in a steam power plant vacuum in condenser reduces what is the effect

15. pressure in industrial pneumatic lines -------5 to 10 bar

16. effect of low temp. ( -20 degree ) on carbon steel .

17.method of hardening of machine guides ways

18. method of joining plastic by welding

19. safe method of loading on a cantilever

a) UDL  b) center point load  c) triangular load having zero at center

20. BMD for UDL in cantilever

Ans. parabolic

PAPER: LnT  PLACEMENT PAPER (TECHNICAL)

1. what is an inode in Unix?

2. small program in Pascal to add a node to a linked list. (You have to tell what the program does)

3. C strcmp program (You have to tell what the program does)

4. set of dos commands testing basic familiarity with dir, ren *.t?t, cd etc.

5. what is the order of binary search?

6. what is the order of strassens matrix multiplication?

7. you have to maintain the sorted order of integers and insert integers . which data structure would you use? (tree, list, queue, array?)

8. There are two lists of integers to be merged. Which method would you not use?

9. In an online database system when is data written to disk? (on pressing enter, when commit or update is encountered, at end of data, all of the above) (was clueless! )

10. Small prolog function which prints 2345true. You need to tell output.

11. Convert this binary into octal. 010 100 101

12. Lisp program given. what does it do? (GCD, LCM, Multiplies mxn?)

13. What is paging?

14. what is segmentation?

15. 2/3 questions on equivalence class, associative and commutative properties.

16. question on poset.

17. one figure given, give regular expression for it

L & T Placement Papers

L&T infotech Placement Paper and Sample Paper 


1) What is a smith chart used for 

2) How is impedance matching done and why do we need it (basically can talk about ideal power supply needing a low internal resistance and high load to function properly. so one stage of transistor amplifier has to have low o/p resistance and high i/p resistance for next stage- do look up all basic electronics) ( also about sinking high currents without damage) 

3) Name all flipflops u know and working esp. master slave.

4) C programming - program to find how many 1's are present in an integer variable using bitwise operators. something about dynamic allocation, static functions, macros

5) c++ virtual functions

6) what types of control r there 

7) QPSK 

8) Though i did mention that i was most comfortable with digital systems, microprocessors, i was asked only one or 2 questions on this topic like what is program counter, stack operation, etc.

9) A lot about final year project.

10) All electives, and subjects mentioned in CV. 

11) CV as in most companies, is inspected very carefully during interview. so be careful what u put there lest they ask u something u are not prepared for. 

i am sorry i cant remember any other questions but i hope this gives u atleast a rough idea about what subjects to cover. 

also ur written test marks are very important. the order in which they call the people also indicates where u stand so try and

compensate by doing well in interview if ur name is towards the end of the list. u would improve ur chances i believe. 

hr interview was only for around 10 minutes, they call if u have cleared tech interview. they asked about what i had been doing for the past 6 months, my plans, how L&T would help me. why L&T etc. the proceedure in mumbai however was totally different I think. they had GD, and HR interview i hear was gruelling. ur GK(number of states in our country, number of lady CMs in India,etc.) 

is tested thoroughly. The form that u are given to fill before the interview, is reqiured to be filled in your neatest handwriting I really think this is imp.) and do take a lot of trouble to write things that would put u in good light. lots of luck to all u chennai people trying for L&T Infotech. Though they have a 2 year bond, this company is really worth going for. Do hope this information helps you a bit. 


THE PAPER IS IN TWO PARTS iN THE FIRST ONE THERE ARE 40 QUESTIONS OF VISUAL REASONING AND IN SECOND THERE ARE 50 QUESTIONS FROM MISCELLANEOUS 30,40 TOPICS Question paper is here:

Part 1:-> Psychometric test.

Easiest thing in the world. Eight figures with you having to predict the ninth. Just use some common sense and u r thru this test. A WORD OF CAUTION tho; plz. do not waste time on a question if u r not sure ,just come back later n then do it. (36questions- 40minutes.)

Part 2:-> Engineering syllabus based Technical Test

Some of the questions r a s follows:-

a) What is reverse engineering.

b) Octal of some binary number(comes to 165 in decimal after conversion).

c) A cobol prog with an integer array(I guess coz i did not have Cobol in my syllabus).

d) A problem on Depth first search(very simple).

e) Question on Grammar's frm Theory of computer science.

f) Something like Select the correct option when A Subset of(B Subset of(A Intersection B).if B is completely contained by A.

g) A question on memory(quite simple).

h) A couyple of questions on C(one on pointers).

We were given the topic "Do u think women make better managers?"A debatable topic , but we merely agreed with each other and no big problem with it.


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Papers -2

1.APM-arithemetic progression matrices 36 questions -40 minutes

2.computer basis -like OP,UNIX,cobol,....(only basic questions )-40 questions -30 minutes.,for all branches the pattern is samefor APM they gave a booklet author-j.v.raven(not sure )very easy even though those who didn't receive call letter after applying don't worry it will end in a walkin. computer questions ex:why goto statement must be avoided,function of engineering reversal, specification&design are related by (followed by venn diagram),some questions in pascal...two c program using while and for staements,


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The first part is entirely from this particular book. Look for it at the second hand book sellers. 

They give you 40 mins for 36 questions."Advanced Progressive Matrices - JC Raven" 

http://www.jcravenltd.com/productrpm.htm is the website about this book.

The second part is of 30 minutes and covers various (IMHO irrelevant) topics. Some more questions. 

Remember all are multiple choice questions with either 4 or 5 options so you have at least a 20-25% chance of being right even if you are clueless. No negative marking. 

1. what is an inode in unix?

2. small program in pascal to add a node to a linked list. (You have totell what the program does)

3. C strcmp program (You have to tell what the program does)

4. set of dos commands testing basic familiarity with dir, ren *.t?t, cd etc.

5. what is the order of binary search?

6. what is the order of strassens matrix multiplication?

7. you have to maintain the sorted order of integers and insert integers . which data structure would you use? (tree, list, queue, array?)

8. There are two lists of integers to be merged. Which method would you not use?

9. In an online database system when is data written to disk? (on pressing enter, when commit 

or update is encountered, at end of data, all of the above) (was clueless! )

10. Small prolog function which prints 2345true. You need to tell output. 

11. Convert this binary into octal. 010 100 101 

12. Lisp program given. what does it do? (GCD, LCM, Multiplies mxn?)

13. What is paging?

14. what is segmentation?

15. 2/3 questions on equivalence class, associative and commutative properties.

16. question on poset.

17. one figure given, give regular expression for it (very basic)


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Sample Paper 2


1. a( [ B ( [A^ C]]

where '(' and '^' are symbols related to SET and '^' is not exact 

symbol , it is curved not conical(due to limitation of 

key board ), represents"union"

a. has no sense

b.It is associative as well as commutative

2.2's complement of given Binary number

3. Octal Equivalent of a Binary number


4.Given -- 

Ac + AB + BC =

a. AC

-- 

b. BC+AC

L&T INFOTECH PLACEMENT PAPER

Technical 

2. Aptitude ( whole based on related figures not mathematical questions )

Aptitude:

IDENTIFY THE UNKNOWN FIGURE FROM GIVEN RELATED FIGURES>

3 - sets of figures(SHAPES ) ARE GIVEN .EACH SET HAVING THREE FIGURES 
LAST SHAPE OF THIRD SET Will be missing and you HAVE TO IDENTIFY it BY CHECKING OTHER COMBINATIONS 


A1 A2 A3

B1 B2 B3

C1 C2 X Find X?

Given 8 number of choices.

(some times X is decided by whole combinations ie, A1, A2 ,A3,B1,B2,B3,C1,C2)


Some combinations will be complicated .So be calm and quite when attendung the aptitude test.Care must be taken to utilize 
the allocated time perfectly since you have only 30 minutes for 36 questions and you have to deal with some complex figures 
( I think in the middle part given combinations were complex ;complex means very complex). 
My advise is to be practise well before attending the test.Since Tchnical part is not hard your fate is decided by aptitude 
Test only.

Technical:

There are 40 Questions and 4 choises for each
Duration : 30 minutes

NOTE :
I list here some Questions and some choices that i do remember ,as it is.Some times there may be mistakes in Questions and
choices.My intension is to present how the test would be.

1. a( [ B ( [A^ C]]
where '(' and '^' are symbols related to SET and '^' is not exact symbol , it is curved not conical(due to limitation of 
key board ), represents"union"

a. has no sense

b.It is associative as well as commutative

2.2's complement of given Binary number

3. Octal Equivalent of a Binary number

4.Given -- 
Ac + AB + BC =


a. AC
-- 
b. BC+AC

5. Question related to linked list 

Given a program coding in C++ and asked what it is doing.class definition not given

choices were a. Deleting a node
b. Adding a node at head
c. Adding a nde at end

I think it is adding a node at the head of the node.


Note: 

You must go through linked list verywell both class definition and program to adding the node ,deleting the node ,
initialising the linked list etc..

6.Some Questions related to data structures like
traversing through 
QUEUE
TREE etc.

7.Evaluate given polish prefix expression ( i am not remembering the expression)

8. LIST| Sort | MORE

a. Lists the files after sorting and diplay "more"
b. List or sort the file and ask for any more files
( I do remember only these two choises )


9. Copy QUEUE/SORT TXT.axb QUEUE/AJITH
cd QUEUE/AJITH
ren TXT*.AXB TXT*.ayb
DEL *.ayb
DIR

What are the files listed?
choices

a. only '.' and '..'
b. all files starting TXT
c. No files listed