SAMPLE QUESTIONS AND ANSWERS BOOKS(WBCHSE)

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visual Basic Assignment #1

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Biswajit Bhunia Assistant Teacher, Bankura Banga Vidyalay my mail: biswajit62418@gmail.com  Question: Write a Program in VB to check whether a given number is Prime or Not. Ans. Open Visual Basic 6.0 Start → Programs/All Programs → Microsoft Visual Studio 6.0 → Microsoft Visual Basic 6.0 Select Standard EXE → Open Take one Label(Label1) → Press F4 → Caption → Enter any Number Take one  TextBox(Text1) → Press F4 → Text → Press SpaceBar Take on CommandButton(Command1) → Press F4 → Caption Double Click on Command1 Write the following Code- PRIVATE SUB COMMAND1_CLICK() DIM N,R,I AS INTEGER N=VAL(TEXT1.TEXT) R=0 FOR I=2 TO N/2 R=N MOD i IF R=0 THEN    MSGBOX “NUMBER IS NOT PRIME”   Exit sub END IF NEXT I IF R=0 THEN  MSGBOX “THE NUMBER IS NOT PRIME” ELSE MSGBOX “THE NUMBER IS PRIME” ENDIF END SUB Save the Project File → Save Project → Save in → Select Desktop → xi69.frm → Save → xi69.vbp → Save Run The Project Press F5
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OSI Model

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ISO/OSI Model By-Biswajit Bhunia, Education Helper  OSI or Open System Interconnection হলো একটি Networking এর মডেল। Why Model  required for Networking?[ Networking এর জন্য কেনো Model দরকার?]      বাড়ি বানাতে গেলে যেমন Plan তৈরি করতে হয়, Bridge বানাতে গেলে যেমন Plan তৈরি করতে হয়,                সেরকম Networking এর জন্য দরকার Plan or Model.
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Computer Memory, Bus and Printer

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 Memory : A storage place where we can store and execute data and program. Memory Hierarchy: Memory: 1. Primary Memory A. Random Access Memory(RAM) or Main Memory i) Static Random Access Memory(SRAM) ii) Dynamic Random Access Memory(DRAM) [SDRAM(Sychronous DRAM) DDR 3/4 : Double Data Rate SDRAM] B. Read Only Memory (ROM) i) Programmable Read Only Memory(PROM) ii) Erasable Programmable Read Only Memory(EPROM) iii) Electrically Erasable Programmable Read Only Memory(EEPROM) iv) Ultra Violet Read Only Memory(UVROM) 2. Secondary Memory Magnetic Tape Harddisk SSD(Solid State Device) Pendrive Floppy Disk Memory Card Zip Drive 3. Cache Memory(High Speed SRAM) : In between CPU and Main Memory L1 Cache L2 Cache Question: 1. What is Memory? 2. Differentiate between Primary and Secondary Memory. 3. Draw the Memory Hierarchy. 4. RAM, ROM, SRAM, DRAM, DDR, SDRAM, SSD, PROM, EPROM EEPROM, UVROM- ...
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