Computer — All MCQs
4795 questions available
Q3881.Once installed on a mobile device, each individual Android application executes within what isolated environment to preserve security?
Correct Answer: A
Android assigns a unique User ID (UID) to each app, forcing it to execute inside an isolated Security Sandbox to prevent unauthorized data access.
Q3882.Which cellular standard is historically characterized by using very small cell towers to maximize frequency reuse in densely populated cities?
Correct Answer: A
2.5G networks (such as GPRS) optimized bandwidth in dense urban centers by employing micro-cells with very small geographic coverage.
Q3883.The fundamental GSM cellular standard is based on which type of traffic channels?
Correct Answer: C
Basic GSM telephony is circuit-switched and connection-oriented, allocating dedicated radio traffic channels to users during calls.
Q3884.In which cellular multiplexing technology is the total frequency spectrum divided into distinct, smaller frequency bands allocated to each user?
Correct Answer: B
FDMA (Frequency Division Multiple Access) divides the available channel bandwidth into distinct non-overlapping frequency bands assigned to users.
Q3885.The fading of received radio signals in mobile communication environments is primarily caused by which phenomenon?
Correct Answer: A
Multipath propagation occurs when radio signals reflect off structures and reach the receiver at different times, causing phase cancellation and fading.
Q3886.At a structural level, how is data organized within a standard computer spreadsheet?
Correct Answer: C
Spreadsheets organize numerical and textual data inside structured grids of horizontal rows and vertical columns.
Q3887.Which logical function in Microsoft Excel does NOT output the boolean words 'TRUE' or 'FALSE' as its direct evaluation result?
Correct Answer: B
The IF function returns custom values specified by the user for true/false states, unlike AND/OR which output boolean values.
Q3888.Which Microsoft Excel function is used to transpose rows of data into columns, and columns into rows?
Correct Answer: B
The TRANSPOSE function rotates the orientation of cell ranges, converting vertical arrays to horizontal arrays and vice versa.
Q3889.What does the coordinate notation 'C7:C9' indicate in a Microsoft Excel worksheet?
Correct Answer: A
The colon (:) represents a continuous range of cells, meaning C7:C9 selects cells C7, C8, and C9.
Q3890.Which category of Excel functions is used to calculate asset depreciation, future investment values, and loan payments?
Correct Answer: A
Financial functions (such as FV, PV, PMT, and SLN) handle calculations regarding loans, investments, interest rates, and depreciation.
Q3891.Which of the following terms are directly associated with computer network architectures?
Correct Answer: D
Network structures are defined by topologies (like Star), connecting hardware points (Nodes) via transmission links.
Q3892.Within a computer processor architecture, in which execution unit are all calculations and logical comparisons performed?
Correct Answer: A
The ALU is the digital processor core designed to perform calculations and process logical comparisons on binary data.
Q3893.How many different character representations can be coded using the 8-bit EBCDIC encoding standard?
Correct Answer: A
EBCDIC is an 8-bit character encoding system, allowing it to represent up to 2^8 = 256 unique characters.
Q3894.The semiconductor chip used to build computer CPUs is primarily manufactured out of which natural element?
Correct Answer: C
CPU microchips are fabricated on silicon wafers due to silicon's properties as an abundant, highly stable semiconductor element.
Q3895.What is the decimal equivalent of the hexadecimal number 1D7F16?
Correct Answer: B
1D7F in hex = (1 * 16^3) + (13 * 16^2) + (7 * 16^1) + (15 * 16^0) = 4096 + 3328 + 112 + 15 = 7551.
Q3896.In what year was the X Window System (a windowing system for bitmap displays on Unix) first developed?
Correct Answer: C
The X Window System was initially developed at MIT in 1984 as a graphical user interface framework for Unix-like operating systems.
Q3897.Which historical figure is widely recognized as the 'Father of Punched Card Processing'?
Correct Answer: B
Dr. Herman Hollerith invented punched-card tabulating machinery for the 1890 US Census, founding the company that later became IBM.
Q3898.What is another collective name for computer input and output devices that are external to the core system unit?
Correct Answer: C
Input and output devices (keyboards, scanners, printers, monitors) connect externally and are termed Peripheral Devices.
Q3899.Which of the following represents a correct association between hardware and its primary system operation?
Correct Answer: A
The computer monitor is an output hardware device used to display visual data. Mouse is input, and hard drive is storage.
Q3900.Which command line utility in MS-DOS and Windows is used to associate a drive letter with a local directory path to create a virtual logical drive?
Correct Answer: B
The SUBST command associates a folder path (e.g., C:\MyFolder) with a virtual drive letter (e.g., X:), simplifying file access.