O LEVEL- IT TOOLS & BUSINESS SYSTEM

TRICKS TO CRACK FIRST PAPER:   

                            M1-R4: IT TOOLS & BUSINESS SYSTEMS

     

        SOME IMPORTANT TOPICS WHICH FREQUENTLY ASKED EVERY            YEAR:--

                  

Difference between  follwings---

SPAM , VIRUS , MALWARE,  INTERPRETER,  COMPILER , IMPACT ,NON IMPACT PRINTER , RAM , ROM ,DDL , DML ,SYSTEM SOFWARE , APPLICATION SOFTWARE , PRIMARY KEY , FOREIGN KEY ,MICR , OCR , MULTROCESSING , MULTIPROGRAMMING , CACHE AND REGISTER MEMORY TEMPLATE AND WIZARD----

Impact printer / Dot-matrix Printer	Non impact Printer / Laser  Printer
1. It prints characters or images by striking print hammer or wheel against an inked ribbon.	1. It prints characters and images without striking the papers.
2. Its speed is slower.	2. Its speed is faster.
3. Its printing quality is lower.	3. Its printing quality is higher.
4. It normally uses continuous paper sheet.	4. Its normally uses individual paper sheet.
5. It generates noise during printing.	5. It does not generate noise during printing.
6. It uses inked ribbon for printing.	6. It uses toner or cartridge for painting.
7. It is less expensive.	7. It is more expensive.
8. Dot matrix is an impact printer.	8. Laser printer is a non-impact printer.

RAM vs ROM difference	RAM	ROM
Data	The data is not permanent and it can be altered any number of times.	The data is permanent. It can be altered but only a limited number of times that too at slow speed.
Speed	It is a high-speed memory.	It is much slower than the RAM.
CPU Interaction	The CPU can access the data stored on it.	The CPU can not access the data stored on it. In order to do so, the data is first copied to the RAM.
Size and Capacity	Large size with higher capacity.	Small size with less capacity.
Usage	Primary memory (DRAM DIMM modules), CPU Cache (SRAM).	Firmware like BIOS or UEFI. RFID tags, microcontrollers, medical devices, and at places where a small and permanent memory solution is required.
Cost	It doesn’t come cheap.	Way cheaper than RAM.

BASIS FOR COMPARISON	DDL	DML
Basic	DDL is used to create the database schema.	DML is used to populate and manipulate database
Full Form	Data Definition Language	Data Manipulation Language
Classification	DDL is not classified further.	DML is further classified as Procedural and Non-Procedural DMLs.
Commands	CREATE, ALTER, DROP, TRUNCATE AND COMMENT and RENAME, etc.	SELECT, INSERT, UPDATE, DELETE, MERGE, CALL, etc.

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