The correct answer is 'B. UNIX' because UNIX was specifically designed by scientists and engineers at AT&T Bell Labs in the 1970s for their own use. It was created to be a powerful and flexible operating system that could meet the needs of technical professionals in various fields. This aligns with the description provided in the question of an operating system designed by scientists and engineers for use by scientists and engineers.
The correct answer is 'C. CPU' because the ALU (Arithmetic Logic Unit) and Control Unit together make up the Central Processing Unit (CPU) of a computer. The CPU is responsible for executing instructions, performing calculations, and controlling the overall operation of the computer system.
The correct answer is 'C. hyperlink' because a hyperlink is a clickable element on a web page that directs the user to another document or webpage. This is the only option that accurately describes the function of a hyperlink in relation to opening another document when clicked. Therefore, 'hyperlink' is the correct answer for this question.
The correct answer is 'C. Port' because a port is a physical or virtual connection point on a computer where external devices can be plugged in or connected. Ports allow for the transfer of data between the computer and external devices such as keyboards, mice, printers, and USB drives. Therefore, a port is the place specifically designed for connecting various external devices to the computer.
The correct answer is 'A. Software' because a computer program is a set of instructions or commands that tell a computer what to do, which falls under the category of software. Software refers to any program or set of programs that tell a computer how to perform specific tasks, making it the most appropriate term to describe a computer program.
The correct answer is 'Artificial intelligence (AI)' because AI is the field of study dedicated to creating machines that can exhibit human-like intelligence. AI involves developing algorithms and technologies that enable machines to learn, reason, and solve problems in a way that mimics human cognitive abilities. Therefore, AI is the science that specifically focuses on producing intelligent machines similar to humans.
The correct answer is 'B. Identity theft' because stealing passwords allows the perpetrator to access personal information and accounts, posing as the victim and potentially causing financial harm or damage to their reputation. This type of crime involves stealing someone's identity by using their passwords to impersonate them online, making it a form of identity theft.
The correct answer is 'B. voice and non-voice' because fourth generation mobile technology enables the transfer of both traditional voice communication as well as non-voice data such as full-motion video, high-speed internet access, and video conferencing. This option accurately captures the comprehensive capabilities of fourth generation mobile technology in handling various types of data transmission.
The correct answer is 'C. Ctrl Space bar' because pressing Ctrl and Space bar simultaneously selects the entire column in Excel. This specific shortcut key combination is designed to quickly select all cells in a column without having to manually click and drag. This makes it an efficient way to work with data in Excel.
The correct answer is 'C. Image' because PNG is a file extension commonly used for image files. The PNG format is known for its ability to support transparent backgrounds and high-quality images, making it a popular choice for web graphics and digital photography.