C++ Basics Review Class XI

Questions and Answers

What are the fundamental units of C++ language?

Character set

What are tokens in C++?

Keywords

Identifiers

Literals

All of the above (correct)

What do keywords convey in C++?

Specific meaning to the language compiler.

What are literals in C++?

Tokens that do not change their value during the program run Signup and view all the answers

Identifiers are user-defined words in C++.

True Signup and view all the answers

What is the purpose of operators in C++?

To perform operations on data. Signup and view all the answers

Which of the following is an example of a special operator in C++?

cin Signup and view all the answers

How can you perform multiple inputs in C++?

By using cin with multiple variables. Signup and view all the answers

In C++, floating point constants are expressed in ______.

fractional form and exponential form Signup and view all the answers

Study Notes

Overview of C++ Concepts

Understanding basic C++ concepts is crucial for advancing in subsequent programming topics.
The chapter serves as a refresher on C++ language skills learned in Class XI.
Core topics include selection statements, looping statements, nested loops, and control statements like break and continue.

Basics of C++

C++ utilizes a character set as the fundamental unit of its language.
Character set includes letters (a-z, A-Z), digits (0-9), special characters (#, ;, :, etc.), and whitespace characters.

Tokens in C++

Tokens are the building blocks of C++ programs, made up of one or more characters.
Types of tokens:
- Keywords: Reserved words with special meaning.
- Identifiers: User-defined names for variables, functions, etc., governed by specific rules.
- Literals: Constants that remain unchanged during execution, classified into:
  - Integer constants: Digits with optional sign.
  - Floating-point constants: Numbers expressed in fractional or exponential forms.
  - Character constants: Single characters in single quotes.
  - String constants: Character sequences in double quotes.

Operators in C++

Operators signify operations in code and are categorized based on the number of operands:
- Unary: Operate on one operand.
- Binary: Operate on two operands.
- Ternary: Operate on three operands.
Types of operations include:
- Arithmetic: (+, -, *, /, %)
- Relational: (=, ==, !=)
- Logical: (&&, ||, !)

Input/Output Operations

Input operation in C++ employs the extraction operator (>>) with two operands:
- The first operand is cin, which identifies the keyboard as the input source.
- The second operand is a variable to store the input.
Multiple variables can be processed in one input statement, e.g., cin >> a >> b >> c;.

Program Structure and Essentials

Familiarity with fundamental program structure is necessary, including:
- Header file specifications.
- Data type sizes.
The GNU Compiler Collection (GCC) and Geany IDE are used for C++ program development.

Description

This quiz covers the essential concepts of C++ taught in Class XI. It includes key topics such as selection statements and looping statements, providing a refresher to help solidify your understanding. Engage with practical programs to enhance your skills in C++.