Green Apex Technolabs Interview Questions and Answers

Q1. You notice OSPF neighbors are stuck in the Exstart state. How would you troubleshoot this issue ?
Ans. 
To troubleshoot OSPF neighbors stuck in Exstart state, check for mismatched parameters, network connectivity issues, and potential network congestion.
• Verify OSPF parameters such as area ID, network type, and authentication match on both neighbors

• Check for network connectivity issues such as firewall blocking OSPF traffic or physical link problems

• Investigate potential network congestion causing packets to be dropped or ...read more
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Q2. If a BGP Session fails what steps would you take to troubleshoot the issue ?
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To troubleshoot a failed BGP session, check the configuration, verify connectivity, analyze logs, and check for any network issues.
• Check BGP configuration for any errors or misconfigurations

• Verify connectivity between the BGP peers

• Analyze BGP logs for any error messages or warnings

• Check for any network issues such as routing problems or firewall blocking BGP traffic
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Q3. How would you diagnose a STP loop in a switches network ?
Ans. 
Diagnosing a STP loop in a switches network involves checking for redundant links, analyzing STP configurations, and using network monitoring tools.
• Check for redundant links in the network that may be causing the loop.

• Analyze the STP configurations on the switches to ensure proper settings and priorities.

• Use network monitoring tools to identify the source of the loop and isolate the affected switches.

• Implement loop pre...read more
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Q1. Why are you leaving your current organization ?
Ans. 
Seeking new challenges and growth opportunities.
• Looking for a new challenge to further develop my skills and knowledge.

• Interested in exploring new technologies and methodologies.

• Seeking opportunities for career advancement and growth.

• Desire for a change in work environment or company culture.
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Q2. Are you comfortable with Night shifts ?
Ans. 
Yes, I am comfortable with night shifts as I have prior experience working during those hours.
• I have previous experience working night shifts in my previous roles.

• I am able to adjust my sleep schedule to accommodate night shifts.

• I understand the importance of being alert and focused during night shifts.

• I am willing to work night shifts as needed to support the team and operations.
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Q1. What is the default index type
Ans. 
B-tree index is the default index type in Oracle database.
• Default index type in Oracle is B-tree index

• B-tree index is suitable for range queries and equality searches

• Other index types in Oracle include bitmap index and function-based index
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Q2. What is the causes of query slowness
Ans. 
Causes of query slowness can include inefficient queries, lack of indexes, outdated statistics, hardware limitations, and network latency.
• Inefficient queries - poorly written queries that do not utilize indexes or join tables unnecessarily

• Lack of indexes - missing indexes on columns frequently used in queries

• Outdated statistics - outdated or inaccurate statistics can lead to poor query execution plans

• Hardware limitatio...read more
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Q3. How to resolve query slowness
Ans. 
To resolve query slowness, analyze query execution plan, optimize indexes, update statistics, consider partitioning.
• Analyze query execution plan to identify bottlenecks

• Optimize indexes to improve query performance

• Update statistics to ensure the query optimizer has accurate information

• Consider partitioning large tables to improve query performance
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Q1. What are closures in javascript
Ans. 
Closures in JavaScript are functions that have access to variables from their outer scope even after the outer function has finished executing.
• Closures allow for maintaining state in an asynchronous environment

• They are created whenever a function is defined within another function

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Q1. Is NaN === NaN
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Q1. How do you handle stressful situations?
Ans. 
I handle stressful situations by staying calm, prioritizing tasks, and seeking support when needed.
• I prioritize tasks to focus on what needs to be done first

• I take breaks to clear my mind and refocus

• I communicate with team members or supervisors for guidance and support

• I practice mindfulness techniques such as deep breathing or meditation
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Q1. Introduction yourself
Ans. 
I am a dedicated PL/SQL developer with 5 years of experience in designing and implementing database solutions.
• Experienced in writing complex PL/SQL queries and stored procedures

• Proficient in performance tuning and optimization of SQL queries

• Skilled in database design and normalization principles

• Familiar with Oracle database technologies such as triggers and packages
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Q2. What is join and its types
Ans. 
Join is used to combine rows from two or more tables based on a related column between them.
• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from the right table

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table

• FULL JOIN r...read more
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Q1. Definition. node js , callback, eventloop
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Q2. What is callback hell
Ans. 
Callback hell is a situation in asynchronous programming where multiple nested callbacks make the code difficult to read and maintain.
• Occurs when multiple asynchronous operations are nested within each other

• Can lead to deeply nested code which is hard to understand and debug

• Can be mitigated using promises, async/await, or libraries like async.js
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Q3. What is react and workingwhich site
Ans. 
React is a JavaScript library for building user interfaces.
• React is used for creating interactive UI components.

• It allows developers to build reusable UI components.

• React uses a virtual DOM for efficient rendering.

• React is commonly used in web development for single-page applications.
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Q4. What is loops and how we use
Ans. 
Loops are used in programming to repeat a block of code multiple times until a certain condition is met.
• Loops help in automating repetitive tasks

• Types of loops include for, while, and do-while

• Example: for loop to iterate over an array and perform an operation on each element
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Q5. What is child process
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A child process is a process created by another process, known as the parent process.
• Child processes inherit resources and attributes from the parent process.

• Child processes can communicate with the parent process and other child processes.

• Examples include when a program spawns multiple processes to perform different tasks.
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Q1. Basic exp details
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Q2. Salary expectations
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Inventory based task for web app

Q1. Overall exp discussion with CEO
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Q1. Storage types, structures, padding
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Q2. Bit operations in C language
Ans. 
Bit operations in C language involve manipulating individual bits within a data structure.
• Bitwise AND (&) - sets a bit to 1 only if both input bits are 1

• Bitwise OR (|) - sets a bit to 1 if either input bit is 1

• Bitwise XOR (^) - sets a bit to 1 if the input bits are different

• Bitwise NOT (~) - inverts all bits in a number

• Left shift (<<) - shifts bits to the left by a specified number of positions

• Right shift (>>) - shifts
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Q1. Educational Background
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