Software, Binary, Bits/Bytes

Which of the following is a task that the operating system is NOT responsible for?

• Manages hardware such as a mouse.

• Keeps track of files and folders.

• Supplies power to peripherals such as a printer.

• Secures the computer with user accounts and passwords.

Answer explanation

The operating system manages hardware, files, and security, but it does not supply power to peripherals like printers. Power supply is handled by electrical systems, not the OS.

Which of the following is a mobile operating system?

• Android

• Microsoft Windows

• Linux

• Embedded OS

Answer explanation

Android is a mobile operating system designed specifically for smartphones and tablets. In contrast, Microsoft Windows and Linux are primarily desktop operating systems, while Embedded OS refers to specialized systems for devices.

Which type of operating system is permanently programmed into a hardware device?

• Embedded OS

• Firmware

• Mobile OS

• Hypervisor

Answer explanation

Firmware is a type of software that is permanently programmed into a hardware device, providing low-level control for the device's specific hardware. It is essential for the device's operation, unlike other OS types.

What is software?

• Programs that can be run on a computer

• The physical components of a computer

• A type of hardware

• A computer virus

Answer explanation

Software refers to programs that can be run on a computer, enabling users to perform tasks. The other options describe hardware or malicious software, which are not definitions of software.

What is the primary function of an operating system (OS)?

• To run applications and manage hardware, memory, and other software

• To provide internet access

• To protect the computer from viruses

• To design graphics

Answer explanation

The primary function of an operating system (OS) is to run applications and manage hardware, memory, and other software, ensuring that all components work together efficiently.

What is the binary number system based on?

• 0 and 1

• 1 and 2

• 0 and 9

• 1 and 10

Answer explanation

The binary number system is based on two digits: 0 and 1. This system is fundamental in computing and digital electronics, where data is represented using these two states.

Which option is NOT an operating system?

• Microsoft Windows

• Linux

• Chrome

• iOS or MacOS

Answer explanation

Chrome is a web browser, not an operating system. In contrast, Windows, Linux, iOS, and MacOS are all operating systems that manage computer hardware and software resources.

What does it mean to encode information?

• Convert data into a specific format

• Delete data

• Store data

• Display data

Answer explanation

Encoding information means to convert data into a specific format, making it suitable for storage, transmission, or processing. This is essential for ensuring that data can be accurately interpreted by different systems.

Which is the largest decimal number you can represent with 8 bits?

• 127

• 128

• 255

• 256

Answer explanation

The largest decimal number representable with 8 bits is 255. This is because 8 bits can represent values from 0 to 255 in unsigned binary (2^8 - 1 = 255). Therefore, the correct answer is 255.

What is the binary representation of the largest number you can represent with 8 bits?

• 11111110

• 11111111

• 11111101

• 11111100

Answer explanation

The largest number representable with 8 bits is 255 in decimal, which is 11111111 in binary. This is achieved by setting all bits to 1, making it the maximum value for an 8-bit binary number.