Year 11 Software Engineering Year exan revision 1

Which number system does a computer use internally?

• Decimal

• Octal

• Binary

• Hexadecimal

Answer explanation

Computers use the binary number system internally, which consists of only two digits: 0 and 1. This system is fundamental for processing and storing data, making 'Binary' the correct answer.

Which of the following is a high-level programming language?

• Machine Code

• Opcode

• C++

• Assembly

Answer explanation

C++ is a high-level programming language that provides abstraction and is user-friendly, unlike Machine Code and Assembly, which are low-level languages. Opcode is a part of machine language, making C++ the correct choice.

What does IDE stand for?

• Internal Development Environment

• Integrated Development Environment

• Interactive Debugging Editor

• Integrated Design Environment

Answer explanation

IDE stands for Integrated Development Environment, which is a software application that provides comprehensive facilities to programmers for software development, including code editing, debugging, and building.

Which of the following is an example of an object-oriented programming concept?

• Recursion

• Iteration

• Encapsulation

• Linear Search

Answer explanation

Encapsulation is a core object-oriented programming concept that involves bundling data and methods that operate on that data within a single unit, or class, while restricting access to some of the object's components.

Which symbol is used in Python for a single-line comment?

• //

• #

• !

• /*

Answer explanation

In Python, the symbol used for a single-line comment is '#'. The choice '//' is incorrect as it is used in languages like C++ and Java. Therefore, the correct answer is '#', not '//', which is not valid in Python.

What is the role of a compiler?

• Store variables

• Translate machine code to high-level code

• Run code line by line

• Translate high-level code to machine code

Answer explanation

A compiler's primary role is to translate high-level code, which is human-readable, into machine code, which is executable by a computer. This process allows programs written in languages like C++ or Java to run on hardware.

Which data structure stores data in key-value pairs?

• List

• Stack

• Tuple

• Hash Table

Answer explanation

A Hash Table is a data structure that stores data in key-value pairs, allowing for efficient data retrieval. In contrast, Lists, Stacks, and Tuples do not use key-value pairs for data storage.

Which of the following is NOT a characteristic of OOP?

• Iteration

• Inheritance

• Encapsulation

• Polymorphism

Answer explanation

Iteration is not a characteristic of OOP. The main principles of OOP include Inheritance, Encapsulation, and Polymorphism, which focus on organizing code and data, while Iteration pertains to looping constructs in programming.

What is the main purpose of an algorithm?

• To execute code

• To solve a problem step by step

• To debug a program

• To store data

Answer explanation

The main purpose of an algorithm is to solve a problem step by step. It provides a clear set of instructions to follow, ensuring that the problem is addressed systematically and efficiently.

Which of the following is a runtime error?

• Dividing by zero

• Wrong formula

• Missing semicolon

• Indentation mistake

Answer explanation

Dividing by zero is a runtime error because it occurs during program execution, causing the program to crash. The other options are syntax errors that can be caught at compile time.