Data Types And Variables - Study Mode

[#36] Which of the following is a primitive data type in Java?
Correct Answer

(D) Char

Explanation

Solution: The correct answer is Option D: char . In Java, a primitive data type is a basic data type that is not an object. char is one of the primitive data types in Java, used to store a single character, such as 'A' or '5'. Here's the breakdown: Option A: String - String is not a primitive data type in Java. It is a class for representing sequences of characters. Option B: Integer - Integer is not a primitive data type, but int (lowercase) is a primitive data type used to store whole numbers. Option C: Boolean - Boolean is not a primitive data type, but boolean (lowercase) is a primitive data type used to represent true or false values. Option D: Char - This is the correct answer. char is a primitive data type in Java used to store a single character. So, the primitive data type in Java among the given options is char .

[#37] Java is a ........... language.
Correct Answer

(B) strongly typed

Explanation

Solution: The correct answer is Option B: strongly typed In Java, it is recognized as a strongly typed language. A strongly typed language enforces strict type checking, meaning that the data type of a variable is checked at compile time and any type mismatches are not allowed without explicit typecasting. Here's an explanation of the other options: - Option A: weakly typed does not apply to Java. Weakly typed languages are those that allow for automatic type conversions and do not enforce strict type checking. - Option C: moderate typed is not a standard term in programming language classification. Java is typically classified as strongly typed. - Option D: None of these is not the correct choice as Java is indeed classified as a strongly typed language.

[#38] How many primitive data types are there in Java?
Correct Answer

(C) 8

Explanation

Solution: Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double .

[#39] In Java byte , short , int and long all of these are
Correct Answer

(A) signed

Explanation

Solution: In Java, byte , short , int , and long are all signed integer data types. Here's the breakdown: Option A: signed - This option is correct. byte , short , int , and long are all signed integer data types in Java, which means they can represent both positive and negative whole numbers. Option B: unsigned - This option is not correct. Java does not have built-in unsigned integer data types. Unlike some other programming languages, all integer data types in Java are signed by default. Option C: Both of the above - This option is not correct because only Option A is true. Java integer data types are signed, not unsigned. Option D: None of these - This option is not correct because Option A is the correct answer. Java's byte , short , int , and long are all signed integer data types. So, in Java, byte , short , int , and long are all signed integer data types.

[#40] Size of int in Java is
Correct Answer

(B) 32 bit

Explanation

Solution: The size of an int in Java is 32 bits . Here's the breakdown: Option A: 16 bit - This is not correct. The int data type in Java is 32 bits in size, not 16 bits. Option B: 32 bit - This is the correct size of an int in Java. An int occupies 32 bits of memory in Java, allowing it to represent a wide range of whole numbers. Option C: 64 bit - This size is not correct for an int in Java. A 64-bit data type is larger and typically used for long integers. Option D: Depends on execution environment - The size of an int in Java is standardized and is always 32 bits regardless of the execution environment. It is not dependent on the platform or execution environment. So, the correct size of an int in Java is 32 bits .