Computer Science

When you point to a text entry in the Office Clipboard gallery, a ScreenTip appears showing the first several characters of the text, helping you identify the item without pasting or deleting it. The other options are incorrect because pointing does not delete or paste the entry.

MS-Word uses Visual Basic for Applications (VBA) to create macros, which allows users to automate tasks within the application. Visual Basic is the correct language associated with MS-Word macros.

Data and programs are stored in the main memory (RAM) when the processor uses them because main memory provides fast access needed for processing. Secondary memory and disk memory are used for long-term storage, and 'Programme memory' is not a standard term.

A macro virus uses computer hosts by embedding itself in documents and reproducing when the document is opened, effectively using the host computer to replicate. Worms self-replicate and spread over networks but do not necessarily use a host program to reproduce.

The Windows key is located between the Ctrl and Alt keys on most standard PC keyboards, making option C the correct answer.

The kernel is the core component of an operating system, responsible for managing system resources and communication between hardware and software. Other options like shell, commands, and scripts are not the core but rather interfaces or tools that operate on top of the kernel.

The Delete key removes the character to the right of the cursor in MS Word, whereas the Backspace key deletes the character to the left. End and Home keys move the cursor to the end or beginning of a line, respectively.

Scaling an image refers to resizing it by a certain percentage, either enlarging or reducing its dimensions proportionally. This distinguishes it from cropping (cutting parts out), flipping (mirroring), or stretching (distorting disproportionately).

An input device converts data and instructions into a form that a computer can understand and process. Output devices display or present data, storage devices save data, and memory temporarily holds data for processing.

The fifth generation of computers is characterized by the development of artificial intelligence and advanced computing technologies and is considered still under development, aiming to create machines that can process natural language and learn. Earlier generations are already established, and sixth or seventh generations are speculative or not widely recognized.

Intel is widely recognized as the largest and most influential company in the microprocessor industry, known for its dominant market share and innovation in CPU technology. While AMD is a significant competitor, Intel remains the biggest player. Motorola and IBM have much smaller roles in this specific market today.

In a client-server system, client computers are typically microcomputers, which are personal computers or workstations used by end users to access services provided by servers.

The layers of an operating system typically include the Kernel, Shell, and Application Program layers. The Critical Section is a concept related to process synchronization, not a layer of the operating system.

ROM (Read-Only Memory) is a type of non-volatile memory, meaning it retains data even when the power is turned off. RAM (Random Access Memory) is volatile and loses data when power is lost. BIOS is firmware stored in ROM, so it is not itself a memory type but stored in non-volatile memory.

A touch device, such as a touchscreen, allows computer operation without the use of a keyboard by enabling direct interaction with the display. While a mouse, joystick, and light pen are input devices, they typically complement rather than replace the keyboard.

The command to select all objects or items at once in most computer applications is Ctrl + A, not Edit, Select All. Ctrl + A is a standard keyboard shortcut for 'Select All'.

A port is a physical interface on a computer used to connect various external devices such as keyboards, mice, printers, and storage devices. This makes option C the correct answer.

The Backspace key deletes the character to the left of the cursor, whereas the Delete key removes the character to the right. End and Home keys move the cursor to the end or beginning of the line, respectively.

To update data in an embedded worksheet range, you need to edit the data in the source document (the original Excel worksheet). Double-clicking the embedded object opens the source for editing, but the actual update happens in the source document, not just by double-clicking.

When a computer is switched on, it performs the Power-On Self-Test (POST) to check the hardware components and ensure they are functioning correctly before loading the operating system.

High-level languages are generally less efficient than low-level languages because they require translation into machine code, which can add overhead. They are machine independent and do not involve machine-level coding directly, making 'Lower efficiency' the main limitation.

The shortcut key for a manual line break (also known as a soft return) in most text editors and word processors is Shift + Enter. This inserts a line break without starting a new paragraph.

The shortcut Shift + Delete permanently deletes the selected data without moving it to the Recycle Bin, making option B the correct answer.

Caret Browsing allows users to navigate and select text on web pages using a keyboard cursor (caret), similar to navigating text in a word processor, enabling keyboard-only navigation.

Heuristic checking is a method used in virus scanning to detect new or unknown viruses by analyzing code behavior rather than relying solely on known virus signatures.