Iit Jee Interview Questions and Answers in 2025 (100+ Q&A)

Iit Jee

Ques:- how much charge on one electron?

Asked In :-

Right Answer:
The charge on one electron is approximately -1.6 x 10^-19 coulombs.

Comments

Admin May 17, 2020

-1.6*10(-19)C

Admin May 17, 2020

1.6*10^-19 e.v

Iit Jee

Ques:- Write a C++ program using user defined functions to reverse every word of a string: eg:My name is should output yM eman si

Asked In :-

Right Answer:
```cpp
#include <iostream>
#include <sstream>
#include <algorithm>

void reverseWord(std::string &word) {
std::reverse(word.begin(), word.end());
}

int main() {
std::string str;
std::cout << "Enter a string: ";
std::getline(std::cin, str);

std::istringstream iss(str);
std::string word;
std::string result;

while (iss >> word) {
reverseWord(word);
result += word + " ";
}

std::cout << "Reversed words: " << result << std::endl;
return 0;
}
```

Iit Jee

Ques:- 1.why there is 365 or 366 days in a year.? 2.and also why there is 30 days in a month? 3. and 23 hours 56 minutes 4 second in a day ? 4 . why there is 28 or 29 days in February?

Asked In :-

Right Answer:
1. There are 365 days in a year because it takes the Earth approximately 365.25 days to orbit the Sun. To account for the extra 0.25 days, we add an extra day every four years, resulting in 366 days in a leap year.

2. Months have 30 or 31 days due to historical decisions made by ancient civilizations, primarily the Roman calendar, which was later modified.

3. A day is defined as 24 hours, but it is based on the Earth's rotation relative to the stars, which takes about 23 hours, 56 minutes, and 4 seconds (a sidereal day).

4. February has 28 days in a common year and 29 days in a leap year to align the calendar with the Earth's orbit around the Sun.

Iit Jee

Ques:- what is the colour of dry silica

Asked In :-

Right Answer:
The color of dry silica is typically white or colorless.

Comments

Admin May 17, 2020

blue

Iit Jee

Ques:- What is the qualification/illegblity And When fillup forms

Asked In :-

Right Answer:
The eligibility criteria for IIT JEE typically include:

1. Candidates must have completed or be appearing for their Class 12 (or equivalent) examination with Physics, Chemistry, and Mathematics.
2. Age limit: Generally, candidates must be born on or after October 1, 1998 (for general category), with some relaxations for reserved categories.
3. Candidates can attempt the exam a maximum of two times in consecutive years.

Forms are usually filled out in December or January for the JEE Main exam, and the JEE Advanced forms are filled out after the JEE Main results are announced.

Comments

Admin May 17, 2020

You must be 12th qualified candidate to appear in IIT JEE Exam.

Iit Jee

Ques:- The book "cricket my style" is written by
1. Sunil gavaskar
2. Sachin tendulkar
3. Kapil dev
4. K. Srikant

Asked In :-

Right Answer:
1. Sunil Gavaskar

Comments

Admin May 17, 2020

Kapil Dev

Admin May 17, 2020

THE BOOK"CRICKET MY STYLE" IS WRITTEN BY " kapil dev"

Iit Jee

Ques:- what is the difference in using 440V ac with 50 HZ and 110 V ac with 60 Hz

Asked In :-

Right Answer:
The main differences are:

1. **Voltage Level**: 440V AC is a higher voltage suitable for industrial applications, while 110V AC is lower and often used in residential settings.
2. **Frequency**: 50 Hz (440V) is commonly used in many countries, while 60 Hz (110V) is used in others, affecting the operation of electrical devices and motors.
3. **Power Transmission**: Higher voltage (440V) allows for more efficient power transmission over long distances with less current, reducing losses.
4. **Device Compatibility**: Equipment designed for 50 Hz may not operate correctly on 60 Hz and vice versa, affecting performance and lifespan.

Iit Jee

Ques:- I wrote letters to four different people and wrote their addresses on four envelopes. But while inserting each letter into an envelope. I was careless. Either I put three letters in right envelopes, or I put two letters in right envelopes or I put one letter in wrong envelope, what did I do?

Asked In :-

Right Answer:
You put all four letters in the wrong envelopes.

Comments

Admin May 17, 2020

you put 2 letters in the right envelope and 2 in the wrong
as it is not possible to put 3 right letters or 1 wrong
letter because if 3 letters are put correctly then the
fourth one has to be in the right envelope

Iit Jee

Ques:- can u make this program simpler

Asked In :-

Right Answer:
To simplify the program, please provide the code you would like to simplify.

Iit Jee

Ques:- what is the measuring principle of o2&co

Asked In :-

Right Answer:
The measuring principle of O2 is typically based on electrochemical sensors or paramagnetic sensors, while CO is commonly measured using non-dispersive infrared (NDIR) sensors or electrochemical sensors.

Iit Jee

Ques:- 4 persons K L M N are initially at 4 corners of a square of side d. each person starts movin with uniform speed v such that K always moves directly towards L, L towards M, M towards N, and N towards K, at what time will they meet???

Asked In :-

Right Answer:
The four persons will meet after a time ( t = frac{d}{v} ).

Comments

Admin May 17, 2020

they will meet due symmetry in thier motion

Admin May 17, 2020

they will meet after d/v time

Iit Jee

Ques:- 3_3_3_3_3=31???????

Asked In :-

Right Answer:
3 + 3 + 3 + 3 + 3 = 15, but if you interpret the question as needing to use operations or concatenation creatively, the answer could be 3 * 3 + 3 * 3 + 3 = 31.

Comments

Admin May 17, 2020

3/3+3^3+3=31
3/3=1
3^3=27
1+27+3=31

Iit Jee

Ques:- who is the current cheif of army staff

Asked In :-

Right Answer:
General Manoj Pande

Iit Jee

Ques:- Which is the largest district in India in terms of population?

Asked In :-

Right Answer:
Thane district in Maharashtra.

Comments

Admin May 17, 2020

Midnapur in West Bengal

Admin May 17, 2020

thane

Iit Jee

Ques:- what if terrorist attack sastra university..will nikil saves the university or not..

Asked In :-

Right Answer:
The question is hypothetical and cannot be answered definitively.

Iit Jee

Ques:- A constant voltage is applied between two ends of a metallic wire. If the length is halved and the radius of the wire doubled, the rate of heat developed in the wire will be:

Asked In :-

Right Answer:
The rate of heat developed in the wire will be doubled.

Iit Jee

Ques:- int x=10,y=6 so guess output of x++/y

Asked In :-

Right Answer:
The output of `x++/y` is `1`.

Comments

Admin May 17, 2020

10/6=1.66666666666666666666666666666666666666666666666666666

Admin May 17, 2020

10/6=1

Iit Jee

Ques:- what do mean by object oriented programming

Asked In :-

Right Answer:
Object-oriented programming (OOP) is a programming paradigm that uses "objects" to represent data and methods. It focuses on concepts like encapsulation, inheritance, and polymorphism, allowing for code reusability and modularity.

Comments

Admin May 17, 2020

Object Oriented Programing is a programming based on the concept objects and using them appropriately.

Admin May 17, 2020

A object oriented programing language is non procedural
language.The problems are derieved into object oriented
program.Data is hidden and can not be accessed by external
function.object may communicate with each other through
functons.New data and functions can be easily added
whenever neccessory.It follof bottom- up design approch in
programming.

Iit Jee

Ques:- write a program to flip the 2nd bit of the 32 bit number

Asked In :-

Right Answer:
```python
def flip_second_bit(n):
return n ^ (1 << 1)

# Example usage
number = 10 # Binary: 1010
flipped_number = flip_second_bit(number)
print(flipped_number) # Output will be 8 (Binary: 1000)
```

Comments

Admin May 17, 2020

{
x = x^2;
}
:-)

Iit Jee

Ques:- Find Square root(2+Sqrt(2+Sqrt(2……..

Asked In :-

Right Answer:
The answer is 2.

Comments

Admin May 17, 2020

answer is correct upto x^2-x-2=0
then (x-2)(x+1)=0
then x=2 or x=-1
only admissible value is x=2

Admin May 17, 2020

let Sqrt(2+Sqrt(2+Sqrt(2+.....=x;
So, x=Sqrt(2+x);
Squaring both side
we get, X^2=x+2
or, x^2-x-2=0
or, x^2-2x+x-2=0
or,x(x-2)+1(x-2)=0
or,(x-2)(x+1)=0
Hence, x=2 or x=-1(Since x cant be negative. )
So x=2 Ans.

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