Practo Interview Questions and Answers

It was a 1.5-hour coding test. We were given three DSA questions to solve. Two of them were Easy to Medium problems and the third one was Medium to Hard question.

Q1. Kotlin interview questions what you'll find in medium posts. (Medium diff)
Add your answer
Q2. Android Interview Questions that you'll find the medium posts. (Medium Diff)
Add your answer
Q3. SOLID principle
Add your answer
Q4. DSA 1 (Whiteboard): A two-pointer array question.
Ans. 
Two-pointer technique efficiently solves array problems by using two indices to traverse and manipulate elements.
• The two-pointer technique is useful for problems involving sorted arrays, such as finding pairs that sum to a target.

• Example: Given an array [1, 2, 3, 4, 5] and target 6, use pointers to find pairs (1, 5), (2, 4), (3, 3).

• It can also be used for removing duplicates from a sorted array by maintaining one point...read more
Answered by AI
Add your answer
Q5. DSA 2 (Whiteboard): Leetcode jump-game question
Ans. 
Determine if you can jump to the last index of an array based on jump lengths.
• The problem involves an array where each element represents the maximum jump length from that position.

• You can use a greedy approach to track the furthest index you can reach as you iterate through the array.

• Example: For array [2,3,1,1,4], you can jump to index 4 (last index) from index 0.

• If at any point the current index exceeds the furthest...read more
Answered by AI
Add your answer
Q6. Followup on space and time complexity and improvements.
Ans. 
Understanding space and time complexity is crucial for optimizing algorithms in Android development.
• Time complexity measures the time an algorithm takes to complete as a function of input size. Example: O(n) for linear search.

• Space complexity measures the amount of memory an algorithm uses relative to input size. Example: O(1) for in-place sorting.

• Improving time complexity can involve using more efficient algorithms, l...read more
Answered by AI
Add your answer

Q1. Design a video streaming app's search page
Ans. 
The search page of a video streaming app should allow users to easily search for and discover content.
• Include a search bar at the top for users to enter keywords or phrases

• Display relevant search results in a grid or list format

• Provide filters or sorting options to refine search results

• Include thumbnails, titles, and brief descriptions of the search results

• Allow users to click on search results to view more details or ...read more
Answered by AI
Add your answer

Q1. General behavioural questions. No tech questions.
Add your answer
Q2. Past experiences/Past projects/Past achievements
Add your answer

2 DSA questions with in one hour.

Q1. Merge two binary trees
Ans. 
Merge two binary trees by summing up the values of corresponding nodes
• Traverse both trees simultaneously and sum up the values of corresponding nodes

• If a node exists in only one tree, add it to the merged tree as is

• Recursively merge the left and right subtrees
Answered by AI
Add your answer
Q2. Explain project
Ans. 
Developed a web application for tracking personal fitness goals and progress
• Used HTML, CSS, and JavaScript for front-end development

• Implemented a RESTful API using Node.js and Express for back-end functionality

• Utilized MongoDB for database storage and retrieval

• Incorporated user authentication and authorization using JWT tokens
Answered by AI
Add your answer

Q1. Tell me about yourself.
Add your answer
Q2. Why should we hire you.
Ans. 
I am a dedicated and quick learner with strong problem-solving skills and a passion for software development.
• Strong problem-solving skills demonstrated through previous projects and coding challenges.

• Quick learner who can adapt to new technologies and tools efficiently.

• Passionate about software development and constantly seeking to improve my skills.

• Dedicated to delivering high-quality code and meeting project deadline...read more
Answered by AI
Add your answer

Q1. What is your role in the company?
Ans. 
As a Senior iOS Developer, I lead app development, mentor junior developers, and ensure high-quality code and user experience.
• Lead the design and development of iOS applications, ensuring they meet user needs and business goals.

• Mentor junior developers, providing guidance on best practices and code reviews to enhance team skills.

• Collaborate with cross-functional teams, including designers and product managers, to defin...read more
Answered by AI
Add your answer
Q2. Automatic Reference Counting
Add your answer

Q1. How do you scale a business
Ans. 
Scaling a business involves strategic planning, efficient resource allocation, and continuous growth.
• Identify key growth opportunities and target markets

• Invest in technology and automation to streamline processes

• Build a strong team and delegate responsibilities effectively

• Establish partnerships and collaborations to expand reach

• Monitor performance metrics and adjust strategies accordingly
Answered by AI
Add your answer
Q2. PRIOR EXPERIANCE
Add your answer

Q1. Similar to round one
Add your answer