Tag: programming languages

Questions Related to programming languages

A lock can be acquired in a class.

  1. True

  2. False


Correct Option: A

What is the purpose of the Runtime class?

  1. To provide access to the Java runtime system.

  2. To avoid run time exception.

  3. To provide the capability to execute code no matter whether or not an exception is thrown or caught.

  4. Both 2 & 3


Correct Option: A

Can a Byte object be cast to a double value?

  1. True

  2. False


Correct Option: B

AI Explanation

To answer this question, we need to understand the concept of casting and the data types involved.

In Java, casting is the process of converting a value from one data type to another. However, there are certain restrictions on which types can be cast to each other.

A byte is an 8-bit signed integer data type, while a double is a 64-bit floating-point data type. These two data types are not directly compatible, and casting a Byte object to a double value is not allowed.

Therefore, the correct answer is:

B. False - A Byte object cannot be cast to a double value.

  1. all sub-classes of Throwable

  2. not the sub classes of RuntimeException

  3. all sub-classes of Error

  4. None of these


Correct Option: B