Celstream Technologies Senior Software Developer Interview Questions and Answers

Q1. What are the solid principal
Add your answer

Q1. Basic css,js,reactjs questions
Add your answer
Q2. Reactjs coding questions related to array, mapping
Add your answer
Q3. Difference between ecma6 and ecma5
Ans. 
ECMA6 introduced new features like arrow functions, classes, and let/const declarations compared to ECMA5.
• ECMA6 introduced arrow functions for more concise syntax: const add = (a, b) => a + b;

• ECMA6 added classes for object-oriented programming: class Person { constructor(name) { this.name = name; } }

• ECMA6 introduced let/const declarations for block-scoped variables: let x = 5; const y = 10;
Answered by AI
Add your answer
Q4. Form in reactjs
Ans. 
Form handling in ReactJS involves creating controlled components to manage form data and handle user input.
• Use state to manage form data and update it with user input

• Handle form submission with onSubmit event handler

• Use controlled components to ensure form data is synced with state
Answered by AI
Add your answer
Q5. Box-modal, arrow function, DOM
Add your answer

Give 10 questions from node js backend

Q1. Ask about angular and node js
Add your answer
Q2. What is package.json
Ans. 
package.json is a file used in Node.js projects to manage dependencies, scripts, and metadata.
• It is a JSON file that contains information about the project, such as name, version, dependencies, and scripts.

• It is used to manage project dependencies by listing them in the 'dependencies' and 'devDependencies' fields.

• It allows developers to define scripts for tasks like building, testing, and running the project.

• Example: {...read more
Answered by AI
Add your answer
Q3. What is components in angular,how share data to component
Ans. 
Components in Angular are building blocks of an application. Data can be shared between components using input properties and output events.
• Components in Angular are reusable, self-contained units of code that define a part of the user interface.

• Data can be shared to a component using input properties, where data is passed from the parent component to the child component.

• Data can also be shared from a child component t...read more
Answered by AI
Add your answer
Q4. What is === and == ,and wher use === is real time projects
Ans. 
=== is strict equality operator, while == is loose equality operator. === is commonly used in real-time projects for accurate comparisons.
• === is a strict equality operator that checks both value and type of operands

• == is a loose equality operator that only checks the value of operands

• === is commonly used in real-time projects to ensure accurate comparisons and prevent unexpected type coercion issues
Answered by AI
Add your answer
Q5. Write arrow function syntax
Ans. 
Arrow function syntax in JavaScript
• Arrow functions are concise syntax for writing function expressions in JavaScript

• They have a shorter syntax compared to traditional function expressions

• They do not have their own 'this', 'arguments', 'super', or 'new.target' keywords
Answered by AI
Add your answer
Q6. What is difference between arrow function and anonymous function
Ans. 
Arrow functions are concise syntax for writing function expressions, while anonymous functions do not have a name.
• Arrow functions have a shorter syntax compared to anonymous functions.

• Arrow functions do not have their own 'this' keyword, while anonymous functions do.

• Arrow functions do not have 'arguments' object, while anonymous functions do.

• Arrow functions are not hoisted, while anonymous functions are hoisted.
Answered by AI
Add your answer

Full c concept MCQ with IQ and Computaional Thinking

Q1. Number system convertion in c
Ans. 
Number system conversion in C involves converting numbers between different bases, such as decimal to binary or hexadecimal.
• Use functions like itoa() to convert integers to strings in different bases

• Use strtol() to convert strings to integers in different bases

• Remember to specify the base when converting numbers
Answered by AI
Add your answer
Q2. Pointers, struct, Data Structure
Add your answer

Q1. Decimal to Binary Convertion
Add your answer
Q2. Hexa Decimal to Binary convertion
Add your answer

Aptitude questions with some basic coding questions

They have given 3 coding questions and some pseudo codings

Q1. Tell about your self
Add your answer
Q2. Some coding questions
Add your answer

Q1. What are the main principles of the Java
Ans. 
Main principles of Java include object-oriented programming, platform independence, and automatic memory management.
• Object-oriented programming: Java is based on classes and objects, allowing for encapsulation, inheritance, and polymorphism.

• Platform independence: Java code can run on any platform that has a Java Virtual Machine (JVM) installed.

• Automatic memory management: Java uses garbage collection to automatically m
Answered by AI
Add your answer
Q2. What is the different between == and equals method
Ans. 
The == operator compares the memory addresses of two objects, while the equals method compares the content of two objects.
• The == operator is used to compare the memory addresses of two objects in Java.

• The equals method is used to compare the content of two objects in Java.

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will return false, but str1.equals(str2) will return true
Answered by AI
Add your answer

Q1. DSA question (Competitive programming)
Add your answer
Q2. LLD question (Competetive)
Add your answer

Aptitude, reasoning,java MCQS

Q1. Technical round
Add your answer

Q1. Second technical round
Add your answer

Q1. HR and package discussion
Add your answer