Memory Management Techniques: Swapping, Paging, and Virtual Memory
Memory Management Techniques
Main Memory: Necessary for operations to reduce the number of I/O operations to secondary storage.
OS Memory Management: Function: to keep the largest number of resident processes, enabling the maximization of resource sharing between processes and other computational tasks.
Strategies for Loading Programs into Main Memory
- Best-fit: The best partition is chosen, selecting a partition where the program leaves the smallest amount of unused space.
- Worst-fit: The worst partition
Essential Industrial and Construction Terms
Construction and Engineering
Jib (Brazo): The arm of a mechanical crane.
Ballast (Lastre): Heavy material placed in the hold of a ship or the gondola of a balloon to enhance stability.
Beams (Viga): Any rigid member or structure loaded transversely, e.g., a wooden, metallic, or stone bar to support a building’s roof.
Borderline (Línea Divisoria): A line that establishes or marks a border.
Buffering (Amortiguación): The act of lessening or absorbing the shock of an impact.
Crane (Grúa): A device for
Read MoreAutomotive and Mechanical Terminology: A Comprehensive Glossary
Automotive and Mechanical Terminology
AIRBORNE (aerotransportado, en el aire): Carried by or through the air.
AT FULL THROTTLE (a todo gas): The state in a vehicle engine when there is the maximum acceleration power.
BLOW UP (estallar): To explode.
BRAKE PADS (pastillas de freno): A thin block which presses on to the disc in a disc brake.
BUMP (choque): A blow or collision.
CAM (leva): An eccentric or multiply curved wheel mounted on a rotating shaft, used to produce variable or reciprocating motion in
Read MoreMFS File System Functions: Write, Inode Retrieval, and Directory Operations
MFS File System Functions
mfs_write Function
Function Signature: int mfs_write(int fd, void *buf, size_t count)
This function writes data to a file within the MFS file system. It takes a file descriptor fd, a buffer buf containing the data to write, and the number of bytes count to write.
Functionality:
- Checks if the file descriptor is valid.
- Verifies if the file is opened.
- Adjusts the write count if it exceeds the file’s remaining capacity.
- Calculates the starting position and block number for writing.
PL/SQL Code Examples: Procedures, Functions, and Cursors
PL/SQL Code Examples
Always do:
set serveroutput on;declare a number; b number; suma number;begina:=5;b:=4;suma:=a+b;dbms_output.put_line(suma);end; set serveroutput on declare a number; b number; nom varchar2(40); suma number; begin nom:='&nombre'; a:=&numero1; b:=&numero2; suma:=a+b; dbms_output.put_line(nom); dbms_output.put_line('The sum is: '||suma); end;declare a number; b CCNA Security Commands: Configuration and Best Practices
Chapter 2: CCNA Security
******** MD5 Authentication Configuration ********
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Configure OSPF MD5 Authentication for all routers in area 0:
R1(config)# router ospf 1
R1(config-router)# area 0 authentication message-digest
R1(config)# interface s0/0/0
R1(config-if)# ip ospf message-digest-key 1 md5 MD5pa55(Password) -
Configure NTP:
R1(config)# ntp server 192.168.0.1
R1(config)# ntp authenticate
R1(config)# ntp trusted-key 1
R1(config)# ntp authentication-key 1 md5 NTPpa55(Password) - Configure