Computer MCQs for Competitive Exams

In Microsoft Excel, pressing the Shift+Space key combination is the correct shortcut to select an entire row.

Satya Nadella is the current Chief Executive Officer of Microsoft, leading the company's strategic direction and innovation since 2014.

Computer programs are sets of instructions that guide a computer to perform specific tasks and operations, enabling its functionality.

File transfer is moving a digital file copy from one computer to another over a communication channel.

Multitasking allows an operating system to run multiple tasks or programs simultaneously by rapidly switching CPU attention.

Spam is unsolicited bulk email, primarily an annoyance, unlike hackers, viruses, or identity theft which are direct security risks.

Random Access Memory (RAM) is the primary working memory where the CPU first accesses data and instructions for active processing.

A DVD (Digital Versatile Disc) is a type of optical disc storage medium, utilizing lasers to read and write data.

A master file holds permanent data about an entity, updated by transaction files to reflect its current status.

A computer virus is a malicious program designed to replicate itself and spread from one program or disk to another, causing disruption.

A digital clock is a device that displays time numerically, representing data in discrete digits, which is characteristic of digital devices.

A UPS (Uninterruptible Power Supply) provides temporary battery power to a computer system, preventing data loss during unexpected power failures.

A CPU (Central Processing Unit) fundamentally contains a control unit, which manages and coordinates all operations within the computer system.

A touch screen functions as both an input device for user interaction and an output device for displaying visual information simultaneously.

UNIVAC stands for Universal Automatic Computer, which was one of the earliest commercial computers designed primarily for business and administrative data processing.

Hybrid computers combine the capabilities of analog computers for measuring and digital computers for counting, offering versatile functionality.

Line spacing refers to the vertical distance between lines of text in a document, which can be adjusted to improve readability and layout.

A network server is the most powerful computer in a typical network, managing resources and providing services to connected clients.

DMA stands for Direct Memory Access, a feature that allows certain hardware subsystems to access main system memory independently of the CPU.

Microprocessors, integrating entire CPUs onto a single chip, are the defining characteristic and switching devices for fourth-generation computers.

The motherboard is the main printed circuit board in a computer, connecting all components like the CPU, memory, and peripherals.

The title bar in MS-Excel prominently displays the name of the currently open workbook, allowing users to easily identify the active file.

The '.mpg' file extension is commonly associated with video files, specifically those encoded using the MPEG (Moving Picture Experts Group) standard.

In many document editors, when a comment is inserted, it typically appears in a small, pop-up "balloon" next to the text.

An effective antivirus program is designed to comprehensively scan devices, identify malicious viruses, and then eliminate them to protect the system.