Computer Description Cost Performance Reliability Size Installed In Numbers
Super Computer Very Costly in Millions Good (Pak Automic Energy) Reliable but less then main frame More than 25 Acres Land Required These are in few numbers
Main Frame Costly but less than super computer Very Good (used in PIA, etc) More Reliable than super computer Less size than super computer These are in more numbers than super computer
Personal Computers Less costly than main frame Very Very Good (used in Offices, business org. etc) More Reilable than main frame Small size than main frame These are in large numbers
PDA’s Costly than Personal Computers Exception Performance(used in multipurpose) More Reliable than Personal Computer Very small size than personal computer These are also available in large numbers
Question 2 (Marks=5)
Differentiate Between Static RAM and Dynamic RAM in Tabular form. ANY TWO Differences
( 2.5 + 2.5 = 5)
SRAM (static RAM). This type of memory maintains data in storage as long as it is powered. Because it is faster and more reliable and expensive than DRAM, SRAM is most often used as cache memory. Earlier forms of SRAM were classified as Async or Sync RAM if they were synchronized with the system clock. The most common type of SRAM today is pipeline burst SRAM, which can operate at higher bus speeds.
DRAM (dynamic RAM). This type of RAM retains its data by being continuously rewritten every few milliseconds. Like SRAM, the data in storage is volatile, meaning it is lost when the system is not powered. DRAM is the most common type of expandable company memory in workstations and servers today, but there are several different types of DRAM.
Another Solution:-
Static RAM (SRAM)
1. 4 times more expensive
2. Very low access time
3. Can store ¼ as much
4. Information stored on RS flip-flops
5. No need for refreshing
Dynamic RAM (DRAM)
1. Low cost
2. Consumes less power
3. Can store 4 times as much
4. Information stored on FET transistors
5. Needs to be refreshed
Another Solution:-
STATIC RAM vs DYNAMIC RAM
Firstly we anxious with static RAM
1)it does not loose signal strength.
2)no refreshing.
3)They made of transistors.
Where as Dynamic RAM
1)looses its signal 1 becomes 0
2)periodic refreshing of memory is needed.
3)These are mostly made of capacitors.
Tuesday, October 26, 2010
PHY101 Assignment 1 - Solution
Q # 1: Consider a box that is placed on different surfaces. Marks = 10
a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
Various possible situations are as under:
I. The box is at rest on a rough horizontal surface.
II. The box is at rest on a rough tilted surface.
III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.
IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.
V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing a hill, and the box is sliding towards the back of the truck.
Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5
Solution:-
In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them.
Q # 3: A traffic light of weight W hangs from two light cables; one on each side of the light. Each cable hangs at a 450 angle from the horizontal. What I the tension in each cable? Marks = 5
a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
Various possible situations are as under:
I. The box is at rest on a rough horizontal surface.
II. The box is at rest on a rough tilted surface.
III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.
IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.
V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing a hill, and the box is sliding towards the back of the truck.
Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5
Solution:-
In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them.
Q # 3: A traffic light of weight W hangs from two light cables; one on each side of the light. Each cable hangs at a 450 angle from the horizontal. What I the tension in each cable? Marks = 5
Saturday, October 16, 2010
What is MDB & GDB?? Carries Marks??
We are still receiving many email from 1st semester students regarding GDB & MDB.
It is to informed you that in your Graded Discussion Board (GDB) VU will announce a topic & you have required to give the answer of that topic/question within due time (2-4 days from announcement). After due date VU announce result and give you marks, these marks included in your CGPA in the end of that course.
On the other hand, Moderated Discussion Board (MDB) is the environment in which you'll ask the questions (in which you are facing problem to understand) to your instructor and after some time your instructor give you answer of that question. Its just a discussion board for all of you and has NO MARKS. In this board you are encourage to ask maximum Questions in which confused.
Best of luck..
VuFlankerz HelpDesk..
It is to informed you that in your Graded Discussion Board (GDB) VU will announce a topic & you have required to give the answer of that topic/question within due time (2-4 days from announcement). After due date VU announce result and give you marks, these marks included in your CGPA in the end of that course.
On the other hand, Moderated Discussion Board (MDB) is the environment in which you'll ask the questions (in which you are facing problem to understand) to your instructor and after some time your instructor give you answer of that question. Its just a discussion board for all of you and has NO MARKS. In this board you are encourage to ask maximum Questions in which confused.
Best of luck..
VuFlankerz HelpDesk..
Monday, September 27, 2010
Subscribe to:
Posts (Atom)