Computer MCQs for Competitive Exams

A scanner is an input device used to convert physical documents or images into digital data, unlike hard disks, flash drives, and DVDs which are storage media.

BCD is an encoding system where each decimal digit is represented by its own 4-bit binary code, hence Binary Coded Decimal.

Worm viruses replicate rapidly, consuming system resources like memory and network bandwidth, eventually leading to system slowdowns or crashes due to resource exhaustion.

J.V. Atanasoff, along with Clifford Berry, developed the Atanasoff-Berry Computer (ABC), often credited as the first electronic digital computing device.

MAN stands for Metropolitan Area Network, a computer network interconnecting users within a geographic area larger than a LAN but smaller than a WAN.

Digital computers represent data using discrete signals, typically binary digits (0s and 1s), which are distinct and separate values, unlike analog computers.

In Microsoft Word, Vertical Alignment is the specific page layout feature that allows you to position text evenly between the top and bottom margins of a page. While horizontal alignment (left, right, center, or justify) manages text placement between the side margins, vertical alignment is essential for documents like title pages, cover letters, or flyers where you want the content to be centered perfectly from top to bottom. To access this, you navigate to the Page Setup dialog box (found under the Layout tab), select the Layout tab, and choose "Center" from the "Vertical alignment" drop-down menu. This feature automatically calculates the necessary white space above and below your content, ensuring a professional and balanced look without the need for manual spacing or excessive carriage returns, which can easily be disrupted if the text is edited later.

Management Information Systems (MIS) are specifically designed to provide relevant information and support effective decision-making processes primarily for managers.

Analogue computers process continuous data directly without converting it to discrete digital signals, maintaining their original form.

A compiler translates an entire high-level program into machine language before execution, creating an executable file.

The Central Processing Unit (CPU) is considered the brain of the computer, performing all arithmetic, logical, and input/output operations.

In a computer spreadsheet, a block of cells, whether contiguous or not, is commonly referred to as a range.

The ENTER key is universally used to confirm selections, execute commands, or move to the next line in text input.

In a computer spreadsheet, rows are conventionally labeled with sequential numbers, typically displayed along the left side of the worksheet.

System software manages computer hardware and software resources, providing a platform for application programs to run effectively.

Mac refers to macOS, Apple's proprietary graphical operating system that powers its Macintosh line of personal computers.

RAM (Random Access Memory) is a type of primary memory, directly accessible by the CPU for quick data retrieval and storage.

Clicking three times with the right mouse button in a spreadsheet typically opens a context menu, not selecting all cells.

The motherboard is the main circuit board that connects and allows communication between the CPU, memory, and other hardware components.

Fugaku, developed by Fujitsu and RIKEN in Japan, was officially recognized as the world's fastest supercomputer in June 2020.

The Brain virus, recognized as the first computer virus for MS-DOS, was indeed created by two brothers from Pakistan in 1986.

Hyphenation options, which control how words break at the end of a line, are consistently located within the Page Layout tab in most word processing applications.

An operating system is precisely the collection of system programs responsible for controlling and coordinating the overall operations and resources of a computer system.

ALU is an acronym that stands for Arithmetic Logic Unit, which is a crucial component of a computer's central processing unit.

A network is correctly defined as a combination of hardware and software components that enables the efficient sharing of information among various computing devices.