Variables and Data Types in C# - Kurdistan Technical Institute

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What is the purpose of variables in programming?

To display output on the screen

To create loops in the program

To perform mathematical operations

To store multiple values in a single container (correct)

Which type of variable stores text values in Java?

float

char (correct)

int

bool

What is the correct way to create a variable in Java?

var variableName = value;

create variableName = value;

variableName = value;

type variableName = value; (correct)

If you want to store a number with decimals in Java, which type of variable would you use?

float Signup and view all the answers

What happens when you assign a new value to an existing variable?

The new value overwrites the previous value Signup and view all the answers

Which type of variable stores values with only two states: true or false?

bool Signup and view all the answers

Which of the following is NOT a rule for naming variables in C#?

Variables can start with a digit Signup and view all the answers

What keyword is used in C# to declare unchangeable and read-only variables?

readonly Signup and view all the answers

Which method is often used to display variable values to the console window in C#?

WriteLine() Signup and view all the answers

In C#, when using the + character with numeric values, it functions as a:

concatenation operator Signup and view all the answers

Which keyword was introduced in C# to declare method-level variables without explicitly specifying a data type?

var Signup and view all the answers

An identifier in C# is used to identify a class, variable, function, or namespace and must start with:

a letter Signup and view all the answers

Which of the following is NOT a legal identifier in C#?

-abc Signup and view all the answers

When declaring more than one variable of the same type in C#, what can be used to separate the variables?

, (comma) Signup and view all the answers

In C#, what happens if a variable is not assigned a value before using it?

It will give a compile-time error Signup and view all the answers

Which of the following cannot be used as an identifier name in C#?

<code>this_is_a_very_detailed_name_for_an</code> Signup and view all the answers

What do Information and Communications Technology cover?

Any product that store, retrieve, manipulate, transmit or receive information electronically in a digital form Signup and view all the answers

When did the Digital Age (Information Age) begin?

During the 21st century Signup and view all the answers

What does the term 'Digital Revolution' refer to?

The advancement of technology from analog electronic and mechanical devices to digital technology Signup and view all the answers

What is the main characteristic of the Information Age?

Rapid shift from traditional industry to an economy based on information technology Signup and view all the answers

Which devices are considered parts of Information and Communications Technology (ICT)?

Computers, cellphones, televisions, radios, and satellite systems Signup and view all the answers

What is the historic period characterized by the rapid shift to an economy based on information technology?

Information Age Signup and view all the answers

What is the main purpose of a computer?

To process input data into useful output information Signup and view all the answers

Which term is used for unprocessed characters or instructions in a computer?

Data Signup and view all the answers

What component of a computer is responsible for analyzing the input data from users at high speed?

System Unit Signup and view all the answers

Which type of device is a microphone in the context of a computer system?

Input Device Signup and view all the answers

What is the primary function of an output device in a computer?

To present processed data to users Signup and view all the answers

Which of the following is NOT considered one of the main components of a computer?

Scanner Signup and view all the answers

'Monitor' and 'Printer' are examples of which type of component in a computer system?

Output Device Signup and view all the answers

'RAM' is an example of a component belonging to which category in a computer system?

Storage Device Signup and view all the answers

'Barcode reader' is an example of which type of device?