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Northcorp Software Java Developer Interview Questions, Process, and Tips
Top Northcorp Software Java Developer Interview Questions and Answers
- Q1. An abstract class can have method implements and abstract method, while an interface only contains abstract method (before Java 8) . Abstract classes support single inher ...read more
- Q2. What is the difference between abstract class and an interface in Java?
- Q3. What is the D/W Hashmap and ConcurrentHashmap in Java?
Northcorp Software Java Developer Interview Experiences
36 interviews found
Anonymous
(2 Questions)
- Q1. How can you create immutable class in Java?
- Ans.
Immutable class in Java cannot be modified after creation, ensuring data integrity.
Make the class final so it cannot be extended
Make all fields private and final so they cannot be modified
Do not provide setter methods, only getter methods to access the fields
If the class contains mutable objects, make sure to return a deep copy of them in getter methods
- Q2. 1 : Declare the class as final. 2 : Make all fields private and final. 3 : Provide no setter methods.
- Ans.
The question is asking to create a class with certain restrictions like being final, having private and final fields, and no setter methods.
Declare the class as final to prevent it from being subclassed.
Make all fields private and final to ensure encapsulation and immutability.
Provide no setter methods to enforce read-only access to the fields.
(2 Questions)
- Q1. What is the use of final Keyword in Java?
- Ans.
The final keyword in Java is used to restrict the user from changing the value of a variable, making a method not overrideable, or making a class not inheritable.
Final variables cannot be reassigned once initialized.
Final methods cannot be overridden in subclasses.
Final classes cannot be extended by other classes.
- Q2. The final keyword s used to declare: Final variables, Final methods and Final classes.
- Ans.
The final keyword is used to declare final variables, final methods, and final classes in Java.
Final variables cannot be reassigned once initialized.
Final methods cannot be overridden in subclasses.
Final classes cannot be extended.
(2 Questions)
- Q1. What is the purpose of static keyword in Java?
- Ans.
The static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
Static variables are shared among all instances of a class.
Static methods can be called without creating an instance of the class.
Static blocks are used to initialize static variables.
Static keyword can also be used to create static nested classes.
- Q2. The static keyword is used to create class-level variable and methods ............etc.
(2 Questions)
- Q1. What is the Java Language?
- Ans.
Java is a high-level programming language known for its portability, security, and object-oriented features.
Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM).
It is known for its robust security features, such as sandboxing and encryption.
Java is object-oriented, allowing for the creation of reusable code through classes and objects.
- Q2. Java is a High level programming language object oriented programming language.
Northcorp Software interview questions for designations
(2 Questions)
- Q1. What is the difference between ==and .equals() in java?
- Ans.
In Java, == compares memory addresses while .equals() compares the actual content of objects.
== compares memory addresses of objects, while .equals() compares the actual content of objects.
== is used to compare primitive data types, while .equals() is used to compare objects.
Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) will be true.
- Q2. ==compares object references, while .equals() compares object values in java.
- Ans.
In Java, == compares object references, while .equals() compares object values.
Use == to compare if two object references point to the same memory location.
Use .equals() to compare if two objects have the same values.
Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) will be true.
Interview Preparation Tips
Get interview-ready with Top Northcorp Software Interview Questions
(2 Questions)
- Q1. The Final Keyword is used to make variables, methods, or classes unchangeable?
- Q2. Final variable, Final method, Final class.
Interview Preparation Tips
(2 Questions)
- Q1. Can a java class extend multiple classes?
- Ans.
No, a Java class cannot extend multiple classes.
Java does not support multiple inheritance for classes.
A class can only extend one other class, but can implement multiple interfaces.
Example: class MyClass extends ParentClass implements Interface1, Interface2
- Q2. No, Java does not support multiple inheritance with classes.
Interview Preparation Tips
(2 Questions)
- Q1. What is the stands for JAVA?
- Ans.
JAVA stands for Java Virtual Machine
JAVA stands for Java Virtual Machine, which is responsible for executing Java bytecode
It provides a platform-independent execution environment for Java programs
The JVM is a crucial component of the Java platform, allowing Java programs to run on any device or operating system
- Q2. Just another virtual accelerator
(2 Questions)
- Q1. What is the stands for JAVA?
- Ans.
Java stands for Just Another Virtual Machine
Java stands for Just Another Virtual Machine
It is a high-level programming language developed by Sun Microsystems
Java code is compiled into bytecode that runs on any Java Virtual Machine (JVM)
- Q2. Just Another virtual accelerator.
(2 Questions)
- Q1. What is the size of an int in Java?
- Ans.
The size of an int in Java is 4 bytes.
An int in Java is a 32-bit signed integer.
It can hold values ranging from -2,147,483,648 to 2,147,483,647.
The size of an int is fixed at 4 bytes on all platforms.
- Q2. The size of an int in Java is 4 bytes (32bits).
- Ans.
Yes, the size of an int in Java is indeed 4 bytes (32 bits).
An int in Java can hold values ranging from -2,147,483,648 to 2,147,483,647.
The size of an int can be confirmed using the 'Integer.SIZE' constant in Java.
Using 'Integer.BYTES' will give the size of an int in bytes.
Interview Preparation Tips
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Northcorp Software Java Developer Interview Process
based on 35 interviews
1 Interview rounds
- Technical Round
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Northcorp Software Java Developer Reviews and Ratings
based on 39 reviews
Rating in categories
|
Software Developer
10
salaries
|  ₹2 L/yr - ₹7.2 L/yr |
|
Devops Engineer
9
salaries
| ₹1.5 L/yr - ₹3.6 L/yr |
|
Data Scientist
8
salaries
| ₹1.8 L/yr - ₹7.2 L/yr |
|
Senior Java Developer
5
salaries
| ₹14 L/yr - ₹22 L/yr |
|
Senior Software Engineer
5
salaries
| ₹9.5 L/yr - ₹23 L/yr |
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