Logic learning 02

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 mathematics formulae . (integration , inverse trignometry , limits ) 

 organic questions (alkane, alkene, alkyne, aromatic compounds) pdf of the above questions here 👇👇👇👇   click here

 WHAT IS PARTITIONING ? Certain operating system use partitioned memory management to allow multiprogramming . • Partitioning means dividing main memory into various sections.  • These section are called as partitions.  • There are two types of partitions: 1) fixed partition .    2) variable partition.   Fixed partition  .  • In this method partitions are fixed at the time of system generation . At this time , system manager has to declear partition time.  • Fixed partition are also called static partition . On declearing fixed partition , the operating system create partition description table.  • It reduces the uses the CPU utiliisation .  • It reduces the degree of multiprogramming. .    variable partition .     In variable partition number of partition and their size are variable  • They are not defined at the time of system generation .  • These partition are created by operating systems...

  Question Bank Standard:- 12th Subject:- Computer Science (D9) Paper I March 2021 सूचना 1. फक्त शवद्यार्थ्यांना प्रश्नप्रकारांचा सराव करून देण्यासाठीच 2. सदर प्रश्नसंचातील प्रश्न बोर्डाच्या प्रश्नपशिके त येतीलच असे नाही याची नोंद घ्यावी. QUESTION BANK XII COMPUTER SCIENCE (D9) – PAPER I CHAPTER 1 – OPERATING SYSTEM MCQ – 1 Mark Q.No. Question Marking scheme 1. Operating system is a __________ i) hardware ii ) software iii) printer iv) input device 1 mark for correct alternative 2. ‘Open files’ is a system call provided under _________ of operating system. i) Information management ii) Process management iii) Memory management iv) GUI 1 mark for correct alternative 3. Program under execution is known as __________. i) File ii) Information iii) Data iv ) Process 1 mark for correct alternative 4. _______is a service of memory management of operating system. i) Copy a file ii) Suspend a Process iii) Allocate a chunk of memory iv) Open a directory 1 mark for correct alternative...

  Some important MCQ . Ans. :- a)-i) , b)- i) , c)- iii) , d)- iii)                        Ans. :- a)- ii) , b)- iii) , c) - iii) , d)- ii)                         Ans.:- a)- ii) , b) - i), c) - iii) , d) - ii)                        And. :- a)- iii) , b)- ii) , c)- iii) , d) - iii)                       Ans. :- a) - ii) , b) - i), c)- iii) , d) - iii)                      Some important previous year questions of programming. 1) 2) 3) 4)

  Surface tension.         Intermolecular forces:- The forces of attraction and repulsion between their molecules . These forces ,are called intermolecular . Their is to forces 1) cohesive force.  2) adhesive force. Cohesive force:- the force of attraction between 2 molecules of same substance called as cohesion. Adhesive force:- the force of attraction and repulsion between the two different substance like liquid and solid ,solid with gas etc. is called adhesion. Range of molecular forces:- The maximum distance between 2 molecules upto which intermolecular forces are effective (also called as short range forces). Distance (10 to the power -9). Sphere of influence :- an imaginary sphere drawn with given molecule as centre and radius equal to the molecular range . Surface film :- The layer of surface of liquid whose thickness is about equal to range of molecular attraction. Surface energy :- when a molecular is taken from the inside to the surface layer work...

 1. ALU  2. STACK POINTER 3. PROGRAM COUNTER 4. INSTRUCTION REGISTER AND DECODER ALU ( ARITHMATIC AND LOGIC UNIT ) It is 8 bit unit  In this arithmetic and logical operation are carried out . ALU contain the binary adder to perform addition substracion by 2’s complement method Data is supplied by memory devices and input ouput devices The result is typically stored in the accumulator. STACK POINTER:- Stack poiointer is a 16 bit register which contain the address of top of stack With the help of incrementer and decrementer stack pointer perform their work The stack pointer is incremented when data is push  The stack pointer is decrementd when data is pop. INSTRUCTION REGISTER AND DECODER :- During the instruction fetch, the first 8 bit of instruction is transfer to the 8 bit instruction register The content of instruction register are available to the instruction decoder The output of decoder get by timing signals, ALU & data buffer. PROGRAM COUNTER:- Program coun...

The elements of this nitrogen group is collectively called  PNICOGENS and their compounds are PNICONIDES.                                  Nitrogen is the most aboundant gas in atmosphere.                                                               Phosphorus is most reactive elements in these group and its colour is yellow ,these form is more reactive form of phosphorus. Which always kept under the water.                  General electronic configuration :- ns2,np3.                In these group the elements have np3 which is outermost orbit and have exactly halffilled so these elements have fairly stability and hence these are inert elements. Eg . N is b...