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Java,dsa and algorithms
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I applied via Campus Placement and was interviewed before Oct 2023. There were 4 interview rounds.
Easy to crack. Just focus on the frequently asked topics
Just stay calm and put up your points also listen to others well.
Developed a web-based project management tool for tracking tasks and deadlines.
Used React.js for front-end development
Implemented RESTful APIs using Node.js and Express
Utilized MongoDB for database management
Again coding test on Hackerrank
posted on 20 Apr 2023
Array sorting in PHP is the process of arranging the elements of an array in a specific order.
PHP provides various sorting functions like sort(), rsort(), asort(), arsort(), ksort(), krsort(), etc.
sort() function sorts the array in ascending order based on the values.
rsort() function sorts the array in descending order based on the values.
asort() function sorts the array in ascending order based on the values while mai...
Merging two arrays in PHP
Use array_merge() function to merge two or more arrays
The resulting array will have all the values from the input arrays
Keys are preserved unless they are numeric and there are duplicates
I applied via Walk-in and was interviewed before Nov 2022. There were 5 interview rounds.
A simple question paper in English
I applied via LinkedIn and was interviewed in Jun 2021. There were 3 interview rounds.
Distinct returns unique values while group by groups and aggregates data based on a column.
Distinct returns only unique values from a single column.
Group by groups and aggregates data based on a column.
Distinct can be used to count the number of unique values in a column.
Group by can be used to group data by a column and perform aggregate functions like sum, count, avg, etc.
Distinct is used to remove duplicates from a ...
Right join and right outer join are the same thing.
Right join and right outer join are interchangeable terms.
Both return all the rows from the right table and matching rows from the left table.
If there is no match, the result will contain NULL values for the left table columns.
Used to combine data from two tables based on a common column.
Syntax: SELECT * FROM table1 RIGHT JOIN table2 ON table1.column = table2.column;
Special characters in columns can be handled by replacing or removing them.
Identify the special characters in the column
Replace the special characters with a suitable alternative
Remove the special characters if they are not necessary
Use regular expressions to handle complex special characters
Ensure that the data type of the column is appropriate
I applied via Campus Placement and was interviewed in Nov 2021. There were 3 interview rounds.
DBMS normalisation and keys
Normalization is the process of organizing data in a database to reduce redundancy and dependency
Keys are used to uniquely identify a record in a table
Primary key is a unique identifier for a record
Foreign key is a field in a table that refers to the primary key of another table
Composite key is a combination of two or more fields that uniquely identify a record
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