10+ Appknox Interview Questions and Answers

Use memory-mapped files or stream the file in chunks.

• Use memory-mapped files to access the file in chunks.

• Stream the file in chunks using a buffer.

• Use compression techniques to reduce the file size before opening.

Count consecutive characters in a string and return the count next to the character.

• Iterate through the string and keep track of consecutive characters and their counts.

• Use a dictionary to store the characters and their counts.

• Return the characters and their counts in the desired format.

Find the second highest repeated integer in a list.

• Iterate through the list and count the frequency of each integer.

• Sort the frequencies in descending order and return the second highest frequency.

• Handle edge cases like when there is no second highest frequency.

A playlist can be implemented using an array of strings to store the list of songs.

• Use an array of strings to store the list of songs in the playlist

• Implement functions to add, remove, and shuffle songs in the playlist

• Consider using a linked list data structure for more efficient insertion and deletion operations

Linked list code for tasks

• Create a linked list class

• Implement add, remove, and search methods

• Use the linked list to perform the tasks

Check for cycle in a linked list by using two pointers approach.

• Use two pointers, one moving at double the speed of the other.

• If there is a cycle, the two pointers will eventually meet.

• Alternatively, use a hash set to keep track of visited nodes.

Good practice of data structures, algorithms, and operating systems is essential for software engineers.

• Regularly practice coding challenges to improve problem-solving skills

• Understand the time and space complexity of algorithms

• Learn about different data structures and when to use them

• Familiarize yourself with operating system concepts like processes, threads, and memory management

Black box testing focuses on testing the functionality of a system without knowledge of its internal code, while white box testing involves testing the internal code structure.

• Black box testing is based on external expectations and requirements

• White box testing is based on internal code structure and logic

• Black box testing is more focused on user perspective

• White box testing is more focused on developer perspective

• Examples: Black box testing - functional testing, acceptance t...read more

Docker is a containerization platform that allows developers to package, deploy, and run applications in isolated environments.

• Docker uses containerization technology to create isolated environments for applications to run in.

• It allows developers to package an application and all its dependencies into a single container.

• Containers can be easily deployed and run on any system that supports Docker.

• Docker provides a way to manage and scale applications more efficiently.

• Examples ...read more

Python is a popular choice for automation testing due to its simplicity, readability, extensive libraries, and cross-platform compatibility.

• Python has a simple and readable syntax, making it easy to write and understand test scripts.

• Python has a large number of libraries and frameworks specifically designed for automation testing, such as Selenium and PyTest.

• Python is cross-platform compatible, allowing tests to be run on different operating systems.

• Python integrates well wit...read more

Design a parking lot system

• Consider the size and layout of the parking lot

• Include features like ticketing system, payment options, and security cameras

• Implement a system for tracking available parking spaces

• Allow for easy entry and exit for vehicles

• Consider implementing a reservation system for premium parking spots

Networking layer model is a conceptual framework that defines the different layers of communication in a network.

• Networking layer model is typically represented by the OSI (Open Systems Interconnection) model or the TCP/IP model.

• The OSI model consists of 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and protocols that enable communication between devices in a network.

• For example, the Network layer (...read more

Top view of binary tree is the nodes visible when viewed from the topmost node.

• Top view shows the nodes visible from the root node's perspective.

• Nodes are printed in the order of their horizontal distance from the root node.

• If two nodes have the same horizontal distance, the node that appears first in the level order traversal is printed first.

I have experience with a variety of technologies including Java, Python, SQL, and JavaScript.

• Java

• Python

• SQL

• JavaScript

Test cases for a pen to ensure functionality and quality.

• Verify that the pen writes smoothly on different types of paper

• Check if the pen's ink is waterproof and does not smudge

• Test the durability of the pen by dropping it from a certain height

• Ensure that the pen's cap can be securely attached and removed

• Verify that the pen's clip is strong enough to hold the pen in place

• Check if the pen's ink dries quickly to prevent smudging

Robot Framework is a powerful open-source automation framework that offers easy-to-use syntax and supports keyword-driven testing.

• Robot Framework provides a simple and readable syntax, making it easy to write and maintain test cases.

• It supports keyword-driven testing, allowing for high-level test case design and reusability.

• Robot Framework has a rich ecosystem with a wide range of libraries and tools, making it highly extensible.

• It supports various test automation approaches,...read more