Polaris Software Placement Paper 3

Polaris Software Placement Paper 3

A mixture of contains milk n water in ratio 5:7.. another in ratio 4:6 now u got a mix these in such a way that milk to water raio is 2:1

There r two discounts .. x% and y % on the costprice of an item .. what is the selling price....

A, b , c can do a piece of work in 5 days .. a and b in some days ,, b and c in some days etc etc ... question is who is the fastest amongthe three... n the answer is A

If x is an odd number then which of the following is odd
a . 2x+1 b ..2x+2 like wise answer is d .. this was the first question

A man purchases 4 mangoes for rs 3 ... sells them at 6 for rs 5 .. what is the profit or loss percentage...

There r two marriage groups .. red n brown no two individuals from the same group can marry each other if a guy marries a gal of any group the guy's group becomes that of the gal the children have the same group as their parents ...now based upon thse facts there were some questions like .....if there is a girl is of red group .. then what can u say about her grandfather ....etc etc ..

How many 3 dogits number r there in which 1st n last digit is 2...

How many minimum socks u gotta take from abag containing 20 red and 20 blue .. so that 2 red socks come out i tried to recollect the Vocab questions there were 10 analogies ... doggeredel:poet and vindicate:mercy

Technical

Tell me about urself?

Do u know c and c++?

Write a program to swap to no s with and without using a third variable

Tell us abt ur project?

What was ur role?

Difference between calloc() and malloc()

difference between stack and heap, when are they used?

Can u deallocate memory of a null pointer?

Why do u want to shift from present job?

What projects did u handle in ur job?

Technology used in ur projects?

explain how a stack is used during function calls?

can a parent function access values of a child function?

What are attribute of a file?

How is a file accessed?

what does the file pointer return?

What is FILE?

fgetc and fputc?

willing to work for more hrs if required?

preference of job location?

Link lists

What is FREE used for

How to delete variables that are dynamically allocated?

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Polaris Placement Paper 2 Detailed

Polaris Software Placement Papers
The test was for one hour.-- 40 technical qns (electrical) for 1/2 hr. and 30 aptitude qns (1/2 hour.) There are two sets of question papers

What is motor is used in ceiling fan & washing m/cs
In electric traction
wt is 8255

8085 has ___ address and ___ data lines

8051 is a ____ bit microcontroller (ans:8 bit)

74LS244 is _____

Bucholz relay is used for _____ protection (trnsfrmr)

Transmission line parameters are called ____

No. of poles and freq given find speed

In which motor starting torque can be incr by adding rotor resistance (IM) there were 4 qns frm Power plants (had to guess in that) 4 qns frm Controls (pretty easy.....like zetaL)
1 means a)underdamped b)undamped c)overdamped d)critically damped

qn abt transistor..basic workin

boolean expn was given for simplification-simple

How many flags does 8085 have? (ans-5)

which of the following are universal gates? (ans-nand,nor)

whts the frequency range of mobile communication?

The resolution of picture in tv depends on..
a. no: of lines scanned b. video detector o/p and 2 more choices were given...

Qn on stability of FET

Wht is the modulation used to transmit sound in tv signal
a. VSB
b. FM and 2 more choices were there...

Wht is double integration of a unit step signal?
a. ramp signal
b. parabola

It mainly covers Operating system..consists of questions in semaphore( 2 questions), job scheduling algorithms (shortest job),paging (2 or 3 questions),virtual memory,hashing, etc virtual memory is used for............

Rdbms covers "Define Query"(simple but 4 options made some complications)

Datastructure : order of randomly serached binary tree

Electronics based questions which covers microprocessor 80386(not 8085) 2or 3 questions

A pulse is passed through a pipe..to detect any damage..this process is called ..........
a. Time reflectometry
b. Piggy backing
Aptitude

Given a 3x3 matrix, find the minor of one of the elements
find the odd one out of the series 48 47 44 40 32 23 12

A goes to school at 4 kmph and reaches 10 mins b4 schedule and at 3 kmph reaches 10 mins after schdule find thedist (ans 4 km)

Meaning of COY (iritated)

Opposite of Grimace

Opposite of FLOODED WITH

JUMBLED letters find out the word, the word was FATIGUE

Simple interest problem

Smallest of four given fractions

A guy walks @ 4kmph from a point..After 4hrs a cyclist starts from the same point @ 10kmph....At wht distance will they meet from the starting point? the qn was almost like this.

x% of people have tea, y% have coffee, z no: of people have both...find the total no: of people... soln: easy..have to use n(AUB)=n(A)+n(B)-n(A intersctn B)..

Complete the series.... 1,4 ,9,25,... (choices- 47,49,64,none)

Analytical question
"failures are stepping stones to success" this means...
a. all success are preceded by failures
b. success consists of failures
c. future can lead to success
d. none..

about matrices.. which of the following don't have inverse? u have to find for which matrix A=0...time consuming...

There was 1 big square which had 16 squares in it..4 in a row & column.. each sqr had a no: in it.. except one sqr.. . had 2 find the missing no:...i dont remember the nos...

4 sentences given..& 4 choices of word given...have to choose 1 word that suits all the 4 sentences... *the police are ___ about the miising boy in the forest. * the detective was ___ her face for marks. and 2 more sentences were there... choices(investigating, searching....).ans:investigating.

Hcf of 2 nos...1024 & 1214...don remember nos exactly..like in rs aggarwal...

out of 500 students,75% of boys and 72% of girls passed.Total pass percentage is 77%.How much girls ...?

how many prime numbers are between 1 to 100?

A greater than B and B less than C. what is the relation between A and C ?

Given a set of different sentences ...we have to choose an appropriate word which should be matching with all sentences
eg: A person --------------the child
The government---------------the people options may be 1)saved 2)preserve (this is not the exact question)