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Question { 1717 }

what are bit fields in c?

Answer

Bitfields allow allocation of a specific number of bits to structure members.

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Question { 1425 }

What is the final keyword in java?

Answer

The term final is a predefined word in Java that is used while declaring values to variables. When a value is declared using the final keyword, then the variable's value remains constant throughout the program's execution.

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Question { 1267 }

What is the difference between struct and class in c#?

Answer

• struct: Members are public by default.
• class: Members are private by default.

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Question { 1265 }

What are loops in java?

Answer

You would use a loop to execute a statement or a block of statements repeatedly.

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Question { 1255 }

What is an infinite loop?

Answer

An endless loop never stops running and has no conditions. By defining any breaking logic in the body of the statement blocks, you can end an infinite loop.

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Question { 1267 }

What is inheritance in java?

Answer

In Java, inheritance refers to the idea that a class's properties can be passed down to another class. It facilitates code reuse and builds connections between various classes.

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Question { 1896 }

What is a class loader?

Answer

The classloader is a component of the Java Runtime Environment (JRE) that is produced or executed when the bytecode is running.Java classes and interfaces must be dynamically loaded into the JVM (Java Virtual Machine) using the class file classloader. The Java runtime system does not require knowledge of files and file systems due to classloaders.

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Question { 1153 }

What is a marker interface?

Answer

An empty interface in Java is referred to as a Marker interface. Serializable and Cloneable are some famous examples of Marker Interface.

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Question { 1536 }

Why packages are used?

Answer

Java uses packages to manage access, avoid naming conflicts, and facilitate finding and using classes, interfaces, and other components.

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Question { 2198 }

When a byte datatype is used?

Answer

An 8-bit signed two-complement integer is called a byte. Bytes support a minimum value of -128 and a maximum value of 127. It is employed when memory conservation is required and the required range of numbers is -128 to 127.

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Question { 1567 }

What is a pointer in c?

Answer

A pointer is a variable that stores the memory address of another variable.

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Question { 1861 }

What is the difference between malloc() and calloc()?

Answer

 malloc(): Allocates a single block of memory without initializing it.
 calloc(): Allocates multiple blocks of memory and initializes them to zero.

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Question { 2074 }

What is the difference between new() and malloc()?

Answer

• new: Calls constructor, returns an object of the correct type.
• malloc(): Does not call constructor, returns void*.

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Question { 2074 }

What is the difference between new() and malloc()?

Answer

o new initializes the object and calls its constructor.
o malloc allocates memory but does not call constructors.

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Question { 1011 }

What is error 503?

Answer

The 503 error is referred to as 503 Service Unavailable. The server is not available to process the request, according to this HTTP status. It occurs while the server is undergoing maintenance or experiences high traffic.

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