Pando Interview Questions and Answers

2 coding questions related to arrays, strings and matrix.

Q1. Given an expression string exp, write a program to examine whether the pairs and the orders "{"."}","(",")","[","]" are correct in the expression given.
Ans. 
Check if brackets in a string are correctly paired and ordered.
• Use a stack to track opening brackets.

• For each closing bracket, check if it matches the top of the stack.

• If the stack is empty at the end, brackets are balanced.

• Example: '{[()]}': balanced, '{[(])}': not balanced.
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Q2. The Next greater Element for an element x is the first greater element on the right side of x in the array. For elements for which no greater element exists, consider the next greater element as -1. Input:...read more
Ans. 
Find the next greater element for each element in the array.
• Iterate through the array from right to left.

• Use a stack to keep track of elements with no greater element found yet.

• Pop elements from the stack until a greater element is found or stack is empty.

• Store the next greater element for each element in a result array.
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Q1. Features of python, difference between java and python, modules in python, oops concepts, classes and objects,etc.
Ans. 
Python is a versatile programming language known for its simplicity and readability. It supports multiple programming paradigms and has a vast standard library.
• Python features include dynamic typing, automatic memory management, and support for multiple programming paradigms like procedural, object-oriented, and functional programming.

• Python is known for its readability and simplicity, making it a popular choice for be...read more
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Q2. Types of databases, sql queries,etc.
Ans. 
Types of databases include relational, NoSQL, and NewSQL. SQL queries are used to interact with relational databases.
• Relational databases store data in tables with rows and columns, using SQL for querying (e.g. MySQL, PostgreSQL)

• NoSQL databases store data in flexible, non-tabular formats and do not require a fixed schema (e.g. MongoDB, Cassandra)

• NewSQL databases combine the scalability of NoSQL with the ACID properties...read more
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Two questions that I solved in JavaScript: one on arrays and the other on binary search.

Q1. In the DSA round, I was asked to write code to determine whether two rectangles intersect, given the top left corner, length, and breadth of both rectangles.
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Q2. Next was to check whether two circles intersect, given their radii and centers?
Ans. 
To check if two circles intersect, compare the distance between their centers to the sum of their radii.
• Calculate the distance between the centers of the two circles using the distance formula: sqrt((x2 - x1)^2 + (y2 - y1)^2)

• If the distance between the centers is less than the sum of the radii, the circles intersect

• If the distance between the centers is equal to the sum of the radii, the circles touch at one point

• If th...read more
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Q1. Python questions
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Q2. Sql questions Query
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Q3. Functions, oops
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2 simple coding question

Q1. Introduction and procjects and internships any previous
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Q2. DSA PREPARE WELL BASIS LEVEL
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