Difference between RAM and Cache: (O Level Previous Year Solutions)
RAM is general purpose memory, used to store programs, data, graphics, etc. You want 64meg or so these days.
Cache is specialized memory used by the CPU to speed up access to the RAM. It acts as a buffer, “looking ahead” and trying to anticipate the next item needed from RAM. When it guesses right, the CPU keeps on running, full sped ahead. When it guesses worng, then the whole machine stops and waits while the right data is found and brought to the CPU. 512K is a decent amount of cache these day’s avoid machines with zero cache (e.g., the early Celerons).
One twist on the cahce front is that the CPUs also have cahce embedded right on the chip itself, these cahce amounts are generally in the 16K – 64 K range. This cache is called LI (Level 1) cache, as opposed to the cache mentioned above (1.2).
Ans. 5(c)
CPU Registers: The central processing unit contains a numbner of memory locatiosn which are a number of memory locations which are individually addressable and reserved for specific purpose. These memory locations are called registers. Some of these registers are accessible to the programmer while some others are for the exclusive use of CPU. This latter set of registers is used for storage, interpretation and and execution of instructions and execution of instructiosn and the intermediate results. Total number of these registers varies among different computers.
Widely used microprocessors have got eighteen 32-bit daa registers which are used for storing instructiosn and operand of various size. One of these seven are 32-bit general purpose registers. These registers are accessible to the programmer and are used for holding addreses or as index registers for indexed memory addressing. We describe below some important central processing registers. The first one is the program counter. This is 16-16 bit register. Its only function is to hold the memory address of the next instruction to be fetched, after executing the current instruction it is also called instructions address register, control register or sequence control register. The second one is instruction registers. It is 32bit register. It is used to store the current instructions which are being executed. These registers are the part of the computer
Ans. 5(d)
The illusions used in the film, television, theater, or entertainment industries to simulate the imagined events in a story are traditionally called special effects (offen abbreviated as SFX, SPFX, or simply FX).
Special effects are traditionally divided into the categories of optical effects and mechanical effects. With the emergence of digital film-making tools a greater distinction between special effects and visual effects has been recognized, with “visual effects” referring to digital post-production and “special effects” referring to on-set mechanical effects and in-camera optical effects.
Optical effects (also called photographic effects), are techniques in which images or film frames are created photographically, either “in-camera” using multiple exposure, matters, or the Schufftan process, or in post-production process using an optical printer. An optical effect might be used to place actors or sets against a different background.
Mechanical effects (also called practical or physical effects), are usually accomplished during the live-action shooting. This includes the use of mechanized props, scenery, scale models, pyrotechnics and Atmospheric Effects: creating physical wind. Rain, fog, snow, clouds etc. Making a car appear to drive by itself, or blowing up a building are examples of mechanical effects. Mechanical effects are often incorporated into set design and makeup. For example. A set may be built with break-away doors or walls. Or prosthetic makeup can be sude to make an actor look like a monster.
Since the 1990s. computer generated imagery (CGI) has come to the forefront of special effects technologies. CGI gives film makers greater control, and allows many effects to be accomplished more safely an convincingly – even, as technology marches on, at lower costs. As a result, many optical and mechnical effects techniques have been superseded by CGI.
Ans. 6(a)
Disk cleanup (O Level M1 R4 Solutions)
Disk Cleanup (cleanmgr.exe) is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computers’ hard drive for files that are no longer of any use, and then removes the unnecessary files, there are a number of different file categories that Disk Cleanup targets when performing the initial disk analysis:
