Infotech is a choice of many when it comes for a job and we understand you well that’s why in this post we have come up with important interview questions which will help you a lot in your preparation.
Technical Interview Questions for 3i Infotech
Below are the 15 most important technical interview questions for 3i infotech which will give your preparation a boost.
Question 1. What is the problem with this code?
Answer. final Path path = Paths.get(…);
Answer. The problem is that the Stream returned by Files.lines() is not closed.
This should be used instead:
final Stream<String> stream = Files.lines(path);
Stream extends BaseStream, and BaseStream extends AutoCloseable. While this has no influence on streams you obtain from collections for instance, the stream returned by Files.lines() is I/O bound. Neglecting to close it correctly may lead to a resource leak in the event of an error occurring while processing the stream.
Question 2. What is the difference between Supervised Learning an Unsupervised Learning?
Answer. If an algorithm learns something from the training data so that the knowledge can be applied to the test data, then it is referred to as Supervised Learning. Classification is an example for Supervised Learning. If the algorithm does not learn anything beforehand because there is no response variable or any training data, then it is referred to as unsupervised learning. Clustering is an example for unsupervised learning.
Question 3. Do gradient descent methods always converge to same point?
Answer. No, they do not because in some cases it reaches a local minima or a local optima point. You don’t reach the global optima point. It depends on the data and starting conditions
Question 4. What is the goal of A/B Testing?
Answer. It is a statistical hypothesis testing for randomized experiment with two variables A and B. The goal of A/B Testing is to identify any changes to the web page to maximize or increase the outcome of an interest. An example for this could be identifying the click through rate for a banner ad.
Question 5. What is the difference between the Void and Null Pointer?
Answer. Null pointers generally do not point to a valid location. A pointer is initialized as NULL if we are not aware of its value at the time of declaration.
Whereas, Void pointers are general-purpose pointers which do not have any type associated with them and can contain the address of any type of variable. So basically, the type of data that it points to can be anything.
Question 6. Which are the different layers that define cloud architecture?
Answer. Following are the different layers that are used by cloud architecture:
CLC or Cloud Controller
SC or Storage Controller
NC or Node Controller
Question 7. What is PHP?
Answer. PHP stand for Hypertext Preprocessor. PHP is a Server Side Scripting Language. PHP is an Open Source Software. PHP is free to download and use. PHP scripts are executed on server. PHP supports many databases such as MYSQL, Informix, Oracle, Sybase, Solid,PostgreSQL, Generic ODBC, etc.
question 8. What are the differences between GET and POST methods in form submitting?
Answer. On the server side: the main difference between GET and POST is where the submitted is stored. The $_GET array stores data submitted by the GET method. The $_POST array stores data submitted by the POST method.
Question 9. What is the method available in form submitting?
Answer. GET and POST.
Question 10. How many ways we can pass the variable through the navigation between the pages?
Answer. Register the variable into the session Pass the variable as a cookie Pass the variable as part of the URL
Question 11. Difference between const char* p and char const* p
Answer. In const char* p, the character pointed by p is constant, so u cant change the value of character pointed by p but u can make prefer to some other location.
In char const* p, the ptr p is constant not the character referenced by it, so u cant make p to reference to any other location but u can change the value of the char pointed by p.
Question 12. When was C language developed?
Answer. C language was developed in 1972 at bell laboratories of AT&T.
Question 13. What do you mean by half-duplex and full-duplex communication? Explain briefly.
Answer. Half-duplex: either sender or receiver can use the channel at one time eg walky-talky and full-duplex: sender or receiver or both can use the channel at one time eg telephone)
Question 14. How can a Pseudo Random Noise Code be usable?
Answer. To be usable for direct sequence spreading, a PN code must meet the following conditions:
Sequence must be built from 2 leveled numbers.
The codes must have sharp auto correlation peak to enable code synchronization.
Codes must have a low cross-correlation value, the lower it is, more are the number of users which can be allowed in the system.
The codes should be “balanced” i.e. the difference between ones and zeros in code may only be one.
Question 15. What is the principle of microwave?
Answer. Microwave essentially means very short wave. The microwave frequency spectrum is usually taken to extend from 1GHZ to 30GHZ. The main reason why we have to go in for microwave frequency for communication is that lower frequency band are congested and demand for point to point communication continue to increase. The propagation of the microwave takes place in spacewave in view of high gain and directivity in the form of a bean and is similar to that of light.
Top 10 HR interview questions for 3i infotech
Go through these top 10 HR interview questions for 3i infotech also.
- What in your opinion is the greatest strength of our company?
- Tell about yourself
- Are you willing to work in any location in India?
- What is/are your area/areas of interest?
- Why our company?
- Where do you see yourself in the next five years?
- Tell me about your Strengths
- What do you know about our Company?
- How will you fit into this Role?
- Why did you apply for this Role?
We have given some very important questions of the Technical and HR interview above. If you have still any queries then you can comment below or you can contact us. We here at Alpigni are always happy to help you.