Oracle interview experience Real time questions & tips from candidates to crack your interview

Member of Technical Staff

Oracle
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2 rounds | 5 Coding problems

Interview preparation journey

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Preparation
Duration: 3 months
Topics: Oops, Data Structures, DBMS, Spring, Hibernate
Tip
Tip

Tip 1 : while going through oops, think of real time scenarios where these concepts can be used. Try to use the concepts while programming.
Tip 2 : Mention only topics that you are confident in.

Application process
Where: Naukri
Eligibility: Min 1year of experience was required.
Resume Tip
Resume tip

Tip 1 : Better to have relevant projects and be thorough with the projects. Expect a lot of questions from the project you mentioned.
Tip 2 : Don't mention the skills that you are not aware of

Interview rounds

01
Round
Easy
Video Call
Duration60 Minutes
Interview date19 Feb 2022
Coding problem3

It was in the morning. The interviewer was good

1. Balanced parentheses

Moderate
10m average time
90% success
0/80
Asked in companies
SalesforceAmazonMicrosoft

Given an integer ‘N’ representing the number of pairs of parentheses, Find all the possible combinations of balanced parentheses with the given number of pairs of parentheses.

Note :

Conditions for valid parentheses:
1. All open brackets must be closed by the closing brackets.

2. Open brackets must be closed in the correct order.

For Example :

()()()() is a valid parentheses.
)()()( is not a valid parentheses.
Problem approach

Step 1: Discussed the problem statement and possible edge cases with the interviewer.(you will get sometime to think about the solution as interviewer will be communicating with you and he won't feel like you have taken lot of time)
Step 2: Discussed possible solutions.
Step 3: One possible solution that he agreed was using a stack to solve the problem.
Step 4: Used stack to store the opening paranthesis and if I get any closing paranthesis matching this opening just pop them out.

Try solving now

2. Square Root Of An Integer

Easy
20m average time
80% success
0/40
Asked in companies
OraclePharmEasyShareChat

You are given an integer ‘A’. Your task is to find the greatest non-negative integer whose square is less than or equal to ‘A’.

Square of a number is the product of the number with itself. For e.g. square of 3 is 9.

Problem approach

Step 1: I have him a brute force approach by running a for loop for numbers 1 to n.
Step 2: I thought of binary search and gave him the solution ( you can find the same through above link).

Try solving now

3. Project based Questions

Discussion regarding current project and on the skills I have worked on. Discussion on b tech project was also there.

Problem approach

Tip 1 : Go through the graduation project thoroughly.
Tip 2 : Be thorough with the skills you have mentioned in the cv

02
Round
Medium
Video Call
Duration60 Minutes
Interview date19 Feb 2022
Coding problem2

This round consisted of one coding problem and a lot of questions on oops and networks.

1. Left View Of Binary Tree

Moderate
30m average time
60% success
0/80
Asked in companies
WalmartSalesforceDelhivery

You have been given a Binary Tree of 'n' nodes, where the nodes have integer values



Example :
If the input tree is as depicted in the picture: 

alt text

The Left View of the tree will be:  2 35 2 
Problem approach

I have solved the problem using queue. You can check the solution in the above link.It is similar to my approach. My code hasn't got compiled. He was okay with the code I have wrote.

Try solving now

2. OOPS based Questions

Oops questions included encapsulation and polymorphism in depth. A lot of networking questions were asked which I wasn't able to answer. All questions were mostly regarding osi model.

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Skill covered: Programming

How do you remove whitespace from the start of a string?

Choose another skill to practice
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