10+ Hexaware Technologies Software Developer Interview Questions and Answers

Graph coloring problem where vertices need to be colored with two colors such that no adjacent vertices share the same color.

• Check if the graph can be colored using two colors without any adjacent vertices sharing the same color.

• Use graph coloring algorithms like Greedy Coloring or Backtracking to solve the problem.

• If there are odd-length cycles in the graph, it is not possible to color the graph with two colors.

• If the graph is bipartite, it is always possible to color it wit...read more

Given an integer N, determine if two teams with equal members can be formed based on the divisors of N.

• Iterate through all divisors of N and assign members to two teams based on whether the divisor is even or odd.

• Keep track of the number of members in each team and check if they are equal at the end.

• Return true if the number of members in both teams is equal, false otherwise.

Find all possible paths for a rat in a maze from start to finish.

• Use backtracking to explore all possible paths in the maze.

• At each cell, check if it is a valid move and mark it as part of the path.

• Explore all four directions (up, down, left, right) recursively.

• When reaching the destination cell, add the path to the result.

• Return all valid paths found in the maze.

BJTs are three-terminal semiconductor devices used for amplification and switching of electronic signals.

• BJTs have three regions - emitter, base, and collector.

• They can be NPN or PNP type, depending on the arrangement of semiconductor materials.

• BJTs are current-controlled devices, where a small current at the base terminal controls a much larger current between the collector and emitter.

• Common BJT examples include 2N2222 (NPN) and BC557 (PNP).

Stacks are data structures that follow the Last In First Out (LIFO) principle, while Graphs are data structures that consist of nodes and edges to represent relationships.

• Stacks are used for implementing functions, backtracking, and expression evaluation.

• Graphs are used for representing networks, social connections, and shortest path algorithms.

• Stacks can be implemented using arrays or linked lists.

• Graphs can be directed or undirected, weighted or unweighted.

• Examples of stack...read more

Abstract classes are used when we want to provide a default implementation, while interfaces are used when we want to enforce a contract.

• Abstract classes can have constructors, while interfaces cannot

• A class can implement multiple interfaces, but can only inherit from one abstract class

• Interfaces are used for loose coupling and flexibility in design

• Abstract classes are used for code reusability and to provide a common base for related classes

• Example: An abstract class 'Animal...read more

Delete removes rows one by one, while truncate removes all rows at once.

• Delete is a DML command, while truncate is a DDL command

• Delete can be rolled back, while truncate cannot be rolled back

• Delete fires triggers, while truncate does not fire triggers

Timber is a logging library for Android development.

• Used for logging messages in Android applications

• Helps in debugging and monitoring the app's behavior

• Provides different log levels like DEBUG, INFO, ERROR, etc.

• Can be customized to log specific information or filter out certain logs

Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.

• Initialize an array of strings to be sorted

• Repeat until no swaps are needed: Compare adjacent elements and swap if necessary

• Continue until the entire array is sorted

Java is used for its platform independence, object-oriented programming, robustness, and large community support.

• Platform independence allows Java programs to run on any device with a Java Virtual Machine (JVM)

• Object-oriented programming allows for modular and reusable code

• Robustness with features like automatic memory management and exception handling

• Large community support with extensive libraries and frameworks available

• Examples: Android apps, enterprise applications, web ...read more