Intellect Design Arena Interview Questions, Process, and Tips

Q1. Javascript questions
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Q2. HTML, CSS, questions
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Q1. Java related concept and coding questions
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Tested on quantitative aptitude along with technicala java mcqs

3 Java questions were given

Q1. Angular basic questions
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Q2. Latest version of angular
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Q1. Previous work experience
Ans. 
I have over five years of experience in software development, focusing on web applications and backend systems.
• Developed a web application for e-commerce using React and Node.js, improving user engagement by 30%.

• Led a team of 4 developers in creating a healthcare management system, streamlining patient data processing.

• Implemented RESTful APIs for mobile applications, enhancing data retrieval speed by 25%.

• Worked with Ag...read more
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Q2. Latest version in angular
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The latest version of Angular is Angular 15, released in November 2022, featuring enhanced performance and new features.
• Angular 15 introduced standalone components, simplifying module management.

• Improved image optimization with the new 'ngOptimizedImage' directive.

• Enhanced developer experience with better error messages and debugging tools.

• Support for 'reactive forms' has been improved for better performance.

• New featur...read more
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Q1. 1.What is final class
Ans. 
A final class is a class that cannot be extended or subclassed.
• Final classes are often used to prevent inheritance and ensure that the class cannot be modified or extended.

• Final classes are typically marked with the 'final' keyword in Java.

• Example: 'String' class in Java is a final class, meaning it cannot be extended.
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Q2. 2.Sort Students List using stream api
Ans. 
Sort a list of students using Java Stream API
• Use the sorted() method to sort the list based on a comparator

• Use the Comparator.comparing() method to specify the sorting criteria

• Use the collect() method to collect the sorted elements back into a list
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Q3. 3. Hashmap vs Hashtable
Ans. 
Hashtable is synchronized and thread-safe, while Hashmap is not synchronized.
• Hashtable is synchronized and thread-safe, while Hashmap is not synchronized.

• Hashtable does not allow null keys or values, while Hashmap allows one null key and multiple null values.

• Hashtable is slower than Hashmap due to synchronization.

• Hashmap is preferred for non-thread-safe applications, while Hashtable is used in multi-threaded environmen
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Q1. What is difference between == and .equals in java
Ans. 
In Java, == is used for comparing reference equality, while .equals() is used for comparing object equality.
• == compares memory addresses of two objects

• .equals() compares the actual contents of the objects

• For primitive data types, == compares values, while for objects, it compares references

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) wi
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Q2. What is difference between hash map and hash table
Ans. 
HashMap is non-synchronized and not thread-safe, while HashTable is synchronized and thread-safe.
• HashMap allows null values and one null key, while HashTable does not allow null keys or values.

• HashMap is faster than HashTable as it is non-synchronized, but HashTable is safer for use in multi-threaded environments.

• HashMap is part of the Java Collections Framework, while HashTable is a legacy class.
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Q3. HashMap is not synchronized so its allow the null values and one null key on other hand hash table not null values
Ans. 
HashMap allows null values and one null key, while HashTable does not allow null values.
• HashMap allows null values and one null key, while HashTable does not allow null values.

• HashMap is not synchronized, while HashTable is synchronized.

• HashMap is faster than HashTable.

• Example: HashMap<String, String> map = new HashMap<>(); map.put(null, "value");

• Example: HashTable<String, String> table = new HashTabl
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