Cactus Communications Full Stack Software Developer Interview Questions, Process, and Tips

Round duration - 90 minutes
Round difficulty - Medium

It was Technical + Aptitude MCQ round.The technical section consisted if MCQ related to DSA,OS,DBMS.The aptitude section consisted of questions related to basic mathematics.

Q1. 
Candies Distribution Problem Statement
Prateek is a kindergarten teacher with a mission to distribute candies to students based on their performance. Each student must get at least one candy, and if two s...read more
Ans. 
The task is to distribute candies to students based on their performance while minimizing the total candies distributed.
• Create an array to store the minimum candies required for each student.

• Iterate through the students' ratings array to determine the minimum candies needed based on the given criteria.

• Consider the ratings of adjacent students to decide the number of candies to distribute.

• Calculate the total candies req...read more
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Round duration - 30 minutes
Round difficulty - Medium

It was a technical interview testing the basic skills of OS and DBMS of candidates along with few project discussions from your CV.

Q1. Can you write 15 Linux commands along with their functions?
Ans. 
List of 15 Linux commands with their functions
• ls - list directory contents

• pwd - print working directory

• cd - change directory

• mkdir - make a new directory

• rm - remove files or directories

• cp - copy files and directories

• mv - move or rename files and directories

• grep - search for patterns in files

• chmod - change file permissions

• ps - display information about running processes

• top - display and update sorted information about pr...read more
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Q2. What are DDL (Data Definition Language) and DML (Data Manipulation Language)?
Ans. 
DDL is used to define the structure of database objects, while DML is used to manipulate data within those objects.
• DDL includes commands like CREATE, ALTER, DROP to define database objects like tables, indexes, etc.

• DML includes commands like INSERT, UPDATE, DELETE to manipulate data within tables.

• Example of DDL: CREATE TABLE employees (id INT, name VARCHAR(50));

• Example of DML: INSERT INTO employees VALUES (1, 'John Doe
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First Round was Aptitute Test having Aptitute Question And Java Questions.

Second round was coding round having two DSA problems

Q1. 1. Difference between .equals() and == function. 2. Fibonacci series 3. MultiThreading
Ans. 
Questions on Java basics - .equals() vs ==, Fibonacci series, and MultiThreading.
• The .equals() function compares the values of two objects, while == compares their memory addresses.

• Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.

• MultiThreading is a technique where multiple threads of execution run concurrently within a single program.

• Examples: 5 == 5 is true, but new Str...read more
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Q1. 1. Javascript code to find the frequency of characters in a sentence. 2. Difference between dynamic and static intialization.
Ans. 
Javascript code to find frequency of characters in a sentence and difference between dynamic and static initialization.
• To find frequency of characters in a sentence, create an object and iterate over each character in the sentence. Increment the count of each character in the object.

• Dynamic initialization refers to initializing a variable at runtime, while static initialization refers to initializing a variable at comp...read more
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