10+ JK Tech Interview Questions and Answers

If the size of fs doesn't increase by chfs command, check for available storage space and ensure proper permissions. If issue persists, consider unmounting the filesystem before resizing.

• Check available storage space using commands like df or du

• Ensure proper permissions to modify the filesystem

• If still unable to increase size, consider unmounting the filesystem before resizing

• Example: df -h to check available storage space

Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.

• Use try-catch blocks to handle exceptions

• Use finally block to execute code after try-catch block

• Use throws keyword to declare exceptions in method signature

• Common exceptions include NullPointerException, ArrayIndexOutOfBoundsException, and IOException

Basic SQL queries such as delete, join, select are used to manipulate and retrieve data from databases.

• DELETE: Removes data from a table based on a condition

• JOIN: Combines data from two or more tables based on a related column

• SELECT: Retrieves data from one or more tables based on a condition

• Examples: DELETE FROM table_name WHERE condition; SELECT * FROM table1 JOIN table2 ON table1.column = table2.column;

SQL queries using joins and window functions

• Use INNER JOIN to combine rows from two or more tables based on a related column

• Use WINDOW functions like ROW_NUMBER() to assign a unique sequential integer to each row within a partition

• Example: SELECT column1, column2, ROW_NUMBER() OVER(PARTITION BY column1 ORDER BY column2) AS row_num FROM table_name

Yes, I am comfortable with the location.

• I am familiar with the area and have no issues commuting to work.

• I have researched the neighborhood and feel safe and comfortable there.

• I have visited the office location and found it convenient for me.

Documentation capability should be sufficient to capture all requirements and changes.

• Documentation should be comprehensive and organized.

• It should capture all requirements and changes throughout the project lifecycle.

• Documentation should be easily accessible and understandable by all stakeholders.

• Tools such as JIRA, Confluence, and SharePoint can be used to manage documentation.

• Regular reviews and updates should be conducted to ensure accuracy and completeness.

To plan repeat business, focus on building strong relationships, providing excellent service, offering incentives, and staying in touch.

• Build strong relationships with clients to encourage loyalty

• Provide excellent service to exceed customer expectations

• Offer incentives such as discounts or rewards for repeat business

• Stay in touch with clients through regular communication and follow-ups

First and find first are both used to locate the first occurrence of a value in a collection, but they have different syntax and behavior.

• First is a LINQ extension method that returns the first element of a sequence that satisfies a specified condition, or the first element if no condition is specified.

• Find first is a method in some programming languages, such as Java and C++, that returns the index of the first occurrence of a value in an array or list.

• First throws an except...read more

Yes, I am familiar with queries in databases.

• Queries are used to retrieve specific data from a database.

• They can be written in SQL (Structured Query Language).

• Examples of queries include SELECT, INSERT, UPDATE, and DELETE.

Implementing a targeted marketing campaign, improving customer service, and expanding product offerings.

• Develop a targeted marketing campaign to reach potential customers

• Improve customer service to retain existing customers and attract new ones

• Expand product offerings to appeal to a wider range of customers