Computer MCQs for Competitive Exams

The correct answer is Paste (not None of the above as designated in the original key).

In digital literacy and word processing pedagogy, understanding keyboard shortcuts is critical for workflow optimization and software proficiency. The key combination Ctrl + V serves as the universal command to execute a Paste operation in Microsoft Word and across the broader Windows environment. When a user copies or cuts text, images, shapes, or tables, that data is temporarily housed in the system clipboard. Pressing Ctrl + V retrieves that exact cached data block and inserts it immediately at the current location of the blinking text cursor.

The alternative distractor choices in this prompt introduce technical inaccuracies or arbitrary spatial constraints. While Option 1 implies it is only used to Paste Texts, the shortcut actually pastes any supported media object, including graphics and charts. Option 3, Paste Tables at the middle of Document, is entirely fabricated; shortcuts do not possess specialized layout logic to alter document geometry automatically. Because the shortcut reliably inserts clipboard contents, correcting the key to Option 2 ensures the test bank maintains the rigorous factual accuracy needed for valid student assessments.

Editors are system software applications specifically designed to facilitate the creation, modification, and management of text and data.

The correct answer is Double-click the right border of the column header (truncated as Double click in the original dataset).

In spreadsheet design and data literacy pedagogy, mastering workspace optimization techniques is vital for maintaining clear data visibility. Excel's AutoFit feature automatically resizes a column's width to precisely match its longest text string or numerical value, preventing truncations or "###" overflow errors. To trigger this behavior with a mouse shortcut, the cursor must be placed on the boundary line dividing the target column header from the column directly to its right. Double-clicking this specific intersection commands the software to evaluate all populated cells in that single column and adjust the boundary instantly.

The alternative distractor configurations present severe text truncations and inaccurate operational steps. For example, double-clicking the left border of a column header would inadvertently AutoFit the *preceding* column, not the active one. Simply clicking the center of the column header merely selects the entire vertical layout, without initiating any resizing calculations. In an optimized software assessment, providing fully descriptive operational pathways ensures that student metrics accurately evaluate practical interface proficiency rather than guesswork.

A document can typically be saved in three primary ways: using the Save command, Save As command, or the Ctrl+S keyboard shortcut.

Vertical alignment for a page in Microsoft Word, offering options like top, center, bottom, or justified, is configured within the Page Setup dialog box.

The maximum number of columns that can be inserted into a single table within Microsoft Word is precisely 63, due to software limitations.

Gutter margin in MS Word is extra space added to the side of a document intended for binding, ensuring text isn't obscured when printed.

AGP is an acronym for Accelerated Graphics Port, a high-speed interface specifically designed for connecting graphics cards to a computer's motherboard.

An executable program is a compiled file containing machine code that can be directly run by a computer's operating system without further modification or interpretation.

CD ROM is an acronym for Compact Disk Read Only Memory, a type of optical disc that stores data and can only be read, not written to.

Supercomputers are the most powerful and fastest computers, designed for complex calculations and processing massive amounts of data quickly.

Microsoft officially launched its Windows 10 operating system to the public on July 29, 2015, as a free upgrade for eligible Windows 7 and 8.1 users.

Mainframe computers are powerful systems used by large organizations for critical applications, processing vast amounts of data, and supporting many users simultaneously.

Editing is the specific process of reviewing and making necessary changes or corrections to the existing content within a document.

Visual Basic for Applications (VBA) is the programming language primarily used within Microsoft Excel to create and automate macros.

OCR stands for Optical Character Recognition, a technology that converts images of text into machine-encoded text, making it editable and searchable.

Bar codes are optical machine-readable representations of data, using varying widths and lengths of parallel lines to store information.

The correct answer is Super Computer (not Mainframe Computer as designated in the original key).

In computer architecture and classification taxonomies, systems are graded by physical footprint, processing throughput, and scaling metrics. A supercomputer represents the absolute apex of scale, designed as a massive, parallel-processing cluster that frequently occupies entire server halls or custom-built facility wings. These systems combine tens of thousands of individual processors working concurrently on monolithic tasks, such as fluid dynamics, molecular modeling, and complex scientific simulations. Their physical layouts demand warehouse-sized industrial footprints and specialized liquid-cooling infrastructures, making them the largest computers on Earth.

The alternative distractor options fall significantly below this threshold of scale and computational design. While a mainframe computer is exceptionally large, it is engineered for simultaneous high-volume transactions and database management for enterprises, making its physical footprint smaller than a distributed supercomputer. Below mainframes sit mini computers (mid-sized servers supporting small business networks) and micro computers (individual personal desktops and consumer laptops). Therefore, adjusting the target key to supercomputer establishes the factual accuracy required for strict educational compliance.

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard, providing 128 unique characters for representing text in computers.

Compilers and interpreters are specialized software applications, which are themselves programs designed to translate or execute other computer code.

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.