Decipher Zone Technologies Interview Questions and Answers

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.

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.

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.

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.

The default value of an int in Java is 0.

• In Java, when an int variable is declared but not initialized, it is automatically assigned the default value of 0.

• For example, int num; // num is assigned the default value of 0.

Yes, the default value of an int in Java is 0.

• In Java, when an int variable is declared but not initialized, it will have a default value of 0.

• For example, int num; will have a default value of 0.

• This default value is assigned by the Java Virtual Machine (JVM) when memory is allocated for the variable.

In Java, == compares memory addresses while .equals() compares the actual content of objects.

• == is used to compare memory addresses of objects, while .equals() is used to compare the actual content of objects.

• == is used for primitive data types comparison, while .equals() is used for object comparison.

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will return false, but str1

The difference between == and equals() in Java for comparing object references and values.

• Use == to compare object references (memory location)

• Use equals() to compare object values

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) will be true

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)

Java is a high-level, object-oriented programming language known for its portability and versatility.

• Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM)

• It is object-oriented, allowing for modular and reusable code

• Java is known for its robust standard library, which includes tools for networking, data structures, and more